Replacement Electric Bike Batteries Guide
You can tell when a battery is nearing the end of its life when it does not provide you with much range. Some high-quality batteries that come on the top e-bikes such as a Bosch battery have a battery management system (BMS) integrated into the battery that actually tells you the current capacity and also how many charge cycles it has gone through.
But no matter what type of battery you have you’ll sooner or later be asking yourself the all-important question: how can I replace my e-bike battery?
Down below Electric Bike Report dives into this question and more in greater detail.
- Are E-bike Batteries Interchangeable?
- Where Should I Go to Get a Replacement E-Bike Battery?
- Replacement Batteries from Original Manufacturers
- E-bike Manufacturers Own Brand Batteries
- Batteries for Out-Dated Motor Systems
- Non-Removable Frame Integrated Batteries
- Third-Party Replacement E-Bike Batteries
- What Should I Do With My Old E-bike Battery?
Are E-bike Batteries Interchangeable?
The reason is that the original e-bike or kit manufacturer has the responsibility to ensure that the battery pack, charger, and e-bike all work safely together, and using a ‘non-original’ replacement pack potentially introduces all sorts of uncontrolled risks.
It’s a little more complicated than this in some situations. For example, some Bosch batteries of different capacities are explicitly made to be interchangeable and there will be many instances where an original supplier and/or manufacturer of the e-bike cannot be traced or has gone out of business – in such cases we look at your options below.
*As an important side note: you should always, if possible, use a charger that comes from the original manufacturer too. The one that comes with your battery should sync up well and not overload the battery. Pairing your battery with a different charger adds in risk of malfunction during charging.*
Let’s first look at the basics of getting a replacement battery for your e-bike, then we will look at some of the major manufacturers of e-bike batteries and some of the main e-bike manufacturers to see which common battery types are still replaceable. Let’s consider the options for replacement in terms of desirability.
Where Should I Go to Get a Replacement E-Bike Battery?
- Go back to the original retailer. If you have a complete electric bike you should buy the replacement battery from that e-bike company via the original retailer if at all possible. Typically you can get a replacement from your local dealer, but in some cases you may need to contact the e-bike company directly.The same goes for electric bike kits. Always check with the electric bike kit company for replacement batteries for their products.
- What if the original retailer is no longer in business? Or what if they are not supplying replacement batteries? Try to source an identical one via the original manufacturer, with their website being the first port of call.
- If original brand batteries are no longer available. Source replacements with care. You may be able to get a direct replacement that says it is directly compatible with your old e-bike battery but use a reputable company (some are considered below, together with the service they offer).
On this last point it may help to note that there are a couple of manufacturing standards for rechargeable lithium-ion batteries used in e-bikes. Although it’s not a legal requirement, it may be that one of the standards is actually marked on the battery itself.
The standards are BS EN 50604‑1 and UN38.3, the latter required for lithium-ion battery transport by air, sea or land. Just because these standards are not marked on a battery doesn’t mean it does not comply with them – but it is a reassuring sign if a battery does bear one or both of these marks.
Note that using a replacement battery that does not come from the original manufacturer (whether a dealer is involved or not) may void the warranty of your electric bike or kit. Check with the e-bike or kit company to understand what their policy is regarding the use of aftermarket replacement batteries.
Replacement Batteries from Original Manufacturers
Bosch E-Bike Batteries
Only Bosch manufactured batteries will be used on any new Bosch e-bike – this has always been the case and so it makes advice on interchangeability a little more straightforward than with the likes of Shimano and Brose who have both allowed the use of third party batteries with their mid-drive motor systems.
There have been four basic designs made by Bosch over the years (good online overview here):
- Rack mounted batteries: PowerPack in 300, 400, and 500 Wh versions which are all interchangeable with each other.
- Down tube mounted batteries: PowerPack in 300, 400, and 500 Wh versions, current versions of which are all interchangeable with each other.
- Frame integrated batteries: PowerTubes in 400, 500, and 625Wh versions, with the 400 and 500 units being interchangeable with each other. The 625Wh may be retrofittable but it needs a compatible frame with a big enough space to house it (400 and 500 units are the same physical dimensions but 625 is bigger). 500 and 625 Wh units are used on the Dual Battery system to give a capacity up to 1250Wh.
- Frame Integrated ‘Smart’ Option batteries: This is a new 750Wh option for 2022 and will be only compatible with 2022+ e-bikes that feature the Bosch ‘Smart’ system and will not be compatible with other Bosch e-bikes that are ‘non-Smart’. Similarly, other types of PowerTube batteries (400, 500, and 625Wh versions) will not be compatible with e-bikes featuring Bosch’s ‘Smart’ system.
Some third-party batteries compatible with Bosch systems are available as detailed in the section below.
There are some suppliers of batteries that will fit older models, in some cases dating back to 2011 when the Bosch e-bikes first entered the market, for example, The Holland Bike Shop in Europe sells some batteries compatible with much older Bosch-powered models.
Shimano E-Bike Batteries
Shimano produces its own brand batteries for use on their systems, but you may also find new e-bikes powered by Shimano motor systems with batteries manufactured by their licensed partners Darfon and SMP. These third party batteries are not interchangeable with any Shimano batteries.
Shimano’s current range includes rack-mounted, downtube-mounted and frame-integrated batteries from 418Wh to 630Wh. You can see a brief overview with detailed links to each battery on offer here.
It’s important to note that each battery model has a limited number of specific battery mounts it will work with, so it is important to replace an old battery with one that is compatible with the mount on your e-bike. You can check out detailed compatibility info here and here.
Shimano says that ‘the oldest current battery we have is the BT-E6000 and the corresponding battery mount BM-E6000. These are compatible with all five of our current drive units (DU-EP8/E8000/E7000/E6100/E5000), but not earlier systems. For reference, DU-E8000 is the oldest in that list – it was introduced in 2016.’
Brose E-Bike Batteries
The only battery listed on Brose’s own website is a 630Wh frame-integrated option.
However, Brose systems are widely used by other manufacturers who also spec own-brand or third-party batteries. These include the likes of the widely respected battery manufacturer BMZ and well-known brands like Scott and BULLS.
For example, Specialized’s ‘full power’ range use Brose-based mid drives and a range of their own brand frame-integrated batteries. Although information on interchangeability is scarce, a Specialized FAQ page, in response to the question ‘Can I increase range by using the 604Wh aftermarket battery in any Turbo Vado/Como?’ says yes, all Vado batteries are cross-compatible as long as you are running the latest firmware (by implication so are Como and Turbo full power batteries are cross-compatible too).
The above appears only to address compatibility on current Specialized models and battery availability for older models appears a bit more complex with lots of debate online over the matter.
The fact that the latest Specialized e-bike batteries contain a Bluetooth chip to communicate with the latest Mission Control App certainly suggest both backward compatibility and availability of third party batteries will be very limited. Current e-bike batteries available from Specialized can be found here.
Yamaha E-Bike Batteries
Yamaha has integrated, rack-mounted and frame-mounted options ranging between 400Wh and 600Wh but information on backward compatibility is rather hard to find. Their systems appear on Haibike models and in the US on their own brand models too.
Giant use Yamaha motor systems but apparently have their own brand of battery – the EnergyPak range. The standard EnergyPak comes in rack-mounted and frame-integrated options whilst the Smart Compact variant allows for faster charging.
Finally, there is the Giant EnergyPak Plus, for use with the Smart Compact – a range extender style battery that fits onto the frame and effectively increases the capacity of the main Plus battery.
Giant’s Service web page states that there are EnergyPaks with 300, 360, 400, 500 and 625Wh capacities and also states ‘Giant EnergyPaks are interchangeable’.
Fazua E-Bike Batteries
This lightweight German-made system uses a frame-integrated 250Wh design and there have been two types of battery, Battery 250 and Battery 250X, the latter having the ability to be switched on and off remotely.
The latest Fazua Evation 250X battery is compatible with all Fazua electric bikes from 2019-22.
GRIN and Cytronex E-bike Kit Batteries
Canada’s GRIN is a true expert in producing a wide variety of e-bike kits. Whilst they do several designs of batteries, one of their best options from a replaceability point of view is their own brand LiGo batteries.
LiGo batteries are very unusual in being modular so that you can easily connect together as many as you like to increase or decrease battery capacity at will. They are particularly suitable for lightweight and folding bikes (I use them on a GRIN Brompton kit) and also for those who want to air travel with e-bikes as the individual battery units are only 98Wh and so are generally allowed on passenger aircraft (disconnect them from each other for travel and reconnect them on landing to make a useful e-bike battery).
The design has been around for several years and is backward compatible.
The UK’s Cytronex produces both European and US spec lightweight kits which use a unique own-design of ‘bottle battery’.
Cytronex says all their lithium bottles are compatible forwards and backward from the first version in 2017. They have different firmware for the new Bluetooth variant but both this and the non-Bluetooth version allow you to use the new 2-way – 5 level Boost Button or the previous one-way 3 level button.
In fact, if you have old and new kits on two bikes you can switch the bottle between both and it will recognize the two different button types automatically.
E-bike Manufacturers Own Brand Batteries
There are hundreds of e-bike manufacturers in the more budget space so it’s way beyond the scope of this guide to cover the options for each one; rather we’ll take a look at a couple of the market leaders.
Rad Power Bikes E-Bike Batteries
Rad Power Bikes first started producing e-bikes for the North American market in 2015 and now claims to be the US market leader. Their website lists several replacement batteries and their current lineup of bikes uses one of two battery designs.
There is the External Battery Pack (with the option for the smaller pack specific to the RadMission) which is compatible with all 2018 and newer model ebikes except the RadRover 6 Plus and RadCity 5 Plus, which use the Semi-Integrated Battery Pack.
Rad Power Bikes does offer legacy options for bikes older than that 2018 ‘cutoff’ and although some of these legacy batteries are currently out of stock Rad says they have plans to restock them.
The battery packs are consistent across their main sales areas of Canada, US and Europe.
The Rad Power website has a great filter system so you can track down the compatibility of what batteries are in stock against all current and previous models, right back to the original 2015 RadRover. All e-bike manufacturers’ websites should provide this service!
Pedego E-Bike Batteries
A longstanding US manufacturer with a clear set of battery specs for current models here. However, there doesn’t appear to be any info about legacy batteries or backward compatibility.
Interestingly, and it seems uniquely amongst the mainstream manufacturers, Pedego have recently introduced a serviceable battery (pictured above) – designed to be easily maintained at the local Pedego store. It features a rear light, brake light and indicators to boot.
Batteries for Out-Dated Motor Systems
There are a number of older motor and battery systems that are either not used or little used these days but there are still some suppliers out there who may be able to help out and if you are in this position a bit of internet research might just turn something up. Let’s take a look at a couple of examples.
BionX E-Bike Batteries
BionX operated between 1998 and 2018 and were once one of the leading e-bike system manufacturers in North America, with the likes of Trek and Kalkhoff using their systems.
There are still limited stocks of spare parts available here and there, including batteries, for example on this Ohm webpage.
Heinzmann E-Bike Batteries
German company Heinzmann had a great reputation for quality and produced the now obsolete Classic system and the newer Direct Power system. At various times both were available as kits or fitted to off-the-peg e-bikes.
In the UK Electric Vehicle Solutions are the main stockist of complete Direct Power kits and of spare parts for the Classic system.
What About Non-removable Frame Integrated Batteries?
A relatively small number of e-bike batteries are incorporated into the frame and not designed to be removed by the rider – they must be charged on the bike. Whilst perhaps inconvenient for some, the system has the benefit of a sleeker and simpler design and keeps the battery cells well-protected.
The Ebikemotion X35 system is one example of the most common lightweight systems out there to feature a frame-enclosed battery.
When it comes to replacing these batteries, to be clear, our official advice is that this is a job for the dealer, or expert shops to do only.
DIY in this area can get tricky in a hurry. Looking into service options to replace batteries in an integrated system is something to consider before purchasing the bike.
Third-Party Replacement E-Bike Batteries
For some older batteries – or even some current ones – there may be manufacturers other than the so-called OEMs (original equipment manufacturers) who made the original batteries. These third-party companies are not recognized by the original e-bike manufacturers so if possible it is always best to go back to your dealer or the manufacturer directly to source an original battery.
However, third-party batteries may be a solution where no original batteries appear to be available.
There are a growing number of companies that provide third-party batteries and here we take a look at a couple of the bigger operations.
Please note that on e-bikes that are still in their warranty period, replacing the battery with one from a third-party manufacturer will most likely void the warranty.
FTH Power has a good amount of experience in the electronics business and has diagnostics and assembly capabilities. They look to have good stocks of popular far eastern battery brands such as Reention (used by the likes of Juiced and Surface 604) and Hailong. They also have this handy battery/model finder to see if they have batteries for your particular model of e-bike.
Third-party battery provision (and recelling services) appear to be bigger business in mainland northern Europe than in the U.S. It makes sense, this is where e-bikes have been around much longer and where the average value of e-bikes is higher. The need to keep older bikes going longer is greater.
For example, Heskon is a major supplier of replacement batteries to dealers and Fiets Accu Revisie is the part of Heskon that sells direct to customers.
The UK’s Electric Transport Shop network offers battery diagnosis (refundable against a replacement battery or recell if required). The ETS says they also have stocks of Battery Management System chips that can be used on certain packs, usually on older e-bikes.
The ETS also says ‘There are so many shapes of e-bike batteries now that we cannot guarantee that we have cell packs to fit them all and it is usually cheaper to buy a factory-built replacement than to hand-build a replacement pack in the UK so we usually recommend buying a battery from the original supplier if the diagnosis proves that’s what is needed. If their supplier is no longer available to supply a replacement pack in this instance we will help people find a suitable replacement or as a last resort we will offer to wire in an alternative pack which may be in a different position on the bike.’
What Should I Do With My Old E-bike Battery?
If at all possible the ideal solution is to take it back to the dealer you bought it from who will send it on for recycling.
In the US the industry is in the midst of setting up its own recycling scheme. It was organized by People for Bikes and will be directly coordinated under the auspices of Call2Recycle. There will be a network of battery drop-off locations from the nation’s roughly 3,000 independent bike shops. Manufacturers and retailers can sign up here.
The batteries will be sent on to ‘processing partners’, four of which are domestic and two of which are foreign—one in South Korea and one in Belgium.
The consortium brands are funding the recycling service, which will be free to riders; of course, consumers will still have to pay for replacement batteries. There are also plans for a consumer-direct mail-in recycling option in the summer – EBR will keep you posted on its development.
There are already such ready-made recycling networks in mainland Europe and the UK is just beginning to establish such a network.
This guide to replacement electric bike batteries hopefully covered the basics of what is out there for you. It’s certainly just the tip of the iceberg though. If there is anything else that wasn’t covered here, let us know in the comments below and we’ll update this guide with the info our readers are looking for!
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I recently received a message from you concerning folding electric bikes and the feasibility of bringing them aboard passenger planes as I want to do go to a number of countries and carry an electric bike with me. Usually the lithium battery is the problem and not the bike in the baggage regulations. I notice that in your answer and in this replacement battery report that it seems to be almost completely related to lithium batteries. I have 4 electric bikes and I believe all four use SLA batteries. I could not find anything in the airline regulations concerning SLA batteries or any real specifics in your battery replacement report concerning SLA batteries.
Don Gerhardt says
I noticed that Electric Rider also sells 12V sealed lead acid batteries that you can use to build 24V, 36V, 48V, 60 and 72V battery packs. I have built batteries using 7 AH and 12 AH lead acid batteries in addition to lithium iron phosphate batteries.
Thank you Don, yes I guess to replace my 24V 9AH battery pack, I would have to buy (2)12V 9AH batteries and hope that they will fit into the battery case that I have. I still don’t quite understand what the airlines require regarding transportation of SLA batteries. I have found that the double lithium battery pack on the electric brompton folding bike offered by NYCeWheels is allowed on most domestic and international flights in your carryon baggage. I still have not found what the requirements are for folding bikes with SLA batteries.
Gordon Kostal says
HI I need a battery for a airstream 905 e bike
Detlef Krause Lolas says
Wow you mixed lead an lithium batteries??
Did it work???
How do you charge ???
What about charging curve ?? And difference in nominal voltage??
If it works I’m really impressed.
Kevin Andreassend says
Has helpful info and laws re shipping batteries https://www.ups.com/content/gb/en/resources/ship/packaging/guidelines/batteries.html
I have a prodecotech stride 500 e bike that needs a battery repaired,,, can call or text me at 281-785-4870
tom perry says
I got my allcell 48 volt 13ah battery pack from Chicago electric bicyles website. It came in about a week and works awesome with my recumbent bike build.
terry brink says
hi pete, i finally received my swiss cruiser, happymaker bike from europe but it has a dead battery?! the builder says i have to take it to a battery shop and they can “kit start” it to start the battery charging again….do u/know of such a shop in arizona??? id love to have u/do a write up on the bike but cant until i get the battery working…its a lithium battery.
I would do a Google search for “electric bike store” in your city or “batteries plus” and you should be able to find a store that can help you.
Saikou Omar khan says
Hi I am from the Gambia west Africa I have a giant electric bike and I really need the Battery but don’t know how to get one and the I cant find it in my country the Gambia can I use computers battery my watts app number is 00220 3577858 . Is shipment possible please and what is the process please I need help. My name is Saikou Omar khan.
If you had another battery of the same voltage you wire them together to help jump start the dead battery. It only takes a little charge in the dead battery to start accepting a charge from the charger.
Ping makes good batteries….very affordable. Keep them cool if you can.
richard banacek says
pete looking for a e trike for my wife lots of range big seat not to high of the ground .she is about 325 lbs like fat tires, basket for shoping cant seem to find any info. on e trikes or where i can see one. thanks pete.
ps . old people need three 3 wheels some have balance problems but love to ride.
Here is a guide that may be helpful: https://electricbikereport.com/electric-trikes/
My partner took the old batteries out but didn`t mark `where` he took the leads off etcetc. I have a 3wheel electric – yes have purchased new batteries but was hoping for a diagram – hm hm I love reading your very helpful column – good on you – yes I am an `oldie` yes you have guessed no doubt.Take care Msrgo
bill hates aowa bikes says
my 60 volt sla aowa bike destroyes the 5 batts in a few months. i use a timer to run charger so i dont believe im over charging them. one question, can this be caused by not using throttle while added gas motor powers it along. ive hooked a meter to motor wires and spinning produces say 20volts. the motor drives bike 25mph steadily. the power for battery system is on when riding it this way. the combination of the two makes for a peppy ride. also , if this is not why batts are dying, id like to try lithium type. if you can recomend where to get pack, combo of packs to make 60 volts and charger.
Dee Cino says
Just have to commend you on your site, Pete. Wish I’d found it sooner, but missed it somehow. Very rare, to find so much content and detail about ebike batteries, replacement methods & sources, etc. .
Moreover, appreciate having learned that installation of replacement batteries sometimes requires labor and labor costs.
Thanks so much for a reader-friendly, thorough, extremely helpful
Simple question…i just bought a used giant hybrid….but i cant seem to find replacement battery to fit in the rack on the back for any reasonable price…i was wondering if i could simply splice wires add a fuseable link and run a 12v motorcycle battery….?..12 v is 12v….right….lithiom ion and lead battries differ a little but i was under the impression they accomplished the same goal…12v
As long as your not trying to sell me 600$ battery.i trust your judgement.
Taylor Collings says
trying to have two of my e moto bike batteries repacked. Any sources:?
I have a Liberty stealth ebike. With pedalec and throttle,I can control speed on throttle but when I start pedalling icant control the speed and can’t go slower without freewheeling Any solution .
Murray McCall says
I want to know why when you offer a video aand you click on it to see it and the screen shows ”This Video Is Private” Why show it if we can’t see it?? case in point….video from Neil Saik0
CEO of NTS Works……………LOL 🙂
Ron fearn says
I’ve got a foldaway bike it needs new battery all it has on it is top- 3133 24/9 Ah is there anyway could get a replacement THKS Ron
I bought an electric bike at a yard sale and do not know the name brand of the bike. It needs a new motor and a new battery, maybe a new charger. Where may I find more information as to what parts to order and what parts to avoid?
Hello Pete ,
I am searching for an ebike for long time work use . You know to and from work . You get that kid in a candy store mentality and at the end leave with a headache.
My budget $750.00 max which includes shipping .
I know there are two options.
2. Conversion kit
I’ve spent the last month debating whether what’s practical and buy a ebike or get the conversion kit .
My question is why is it none of the “conversions ” come with the battery ? And when the cost of the conversion kit and battery costs as much as getting a ebike ?
Which one would you do if you had a mountain bike and get a conversion kit ? or get the new ebike and save maybe a few bucks or possibly spend the same amount .
I am looking for a replacement battery for an older GIANT Lite e-bike but understand that they are no longer manufactured and was wondering if anyone might know where I can find one?
I have 2 E-bikes and would like to buy extra battery’s for them
An Ancheer E-bike with 36V8AH250W
And an GoPlus also with a 36V8AH battery.
Where can I buy then for less then the price of the bike with a battery.
I have 2 E-bikes and would like to buy extra battery’s for them
An Ancheer E-bike with 36V8AH250W
And an GoPlus also with a 36V8AH battery.
Where can I buy then for less then the price of the bike with a battery.
Interested in Giant Quicke eBike and base street model has smallest battery (cost) and question if that’s sufficient or should be looking at larger battery or different make/model?
Tom Sutherland says
Do you have an outlet in Australia -preferably in Melbourne? If not would you oblige me with helpful suggestions please. My battery is caput. The on installed is 48volt(4×12 volt 14 ah in series) 200 Watt. Can I replace it with a lithium battery, and am I looking for trouble if its specifications provide for 750 Watts?
I am a WW2 veteran, 94,with eyesight that will soon cost me my driver’s licence, so getting the E-Trike in order is of paramount importance. I would appreciate anything helpful. Thankyou in advance.
Maggie Powers says
Help, I have a Sduro Haibike. The cheap plastic sleeve around
the 4 prongs on the yamaha battery broke. This sleeve had a
guide on it so it would only accept the battery charger cable
one way. With the sleeve gone, I plugged the cable in incorrectly
and blew up the battery and charger. Is there anyway to replace
this battery without spending a whole lot of money?
kaye hill says
I am trying to find a battery replacement company i can deal with from NZ. I purchased 3 x 36v 10ah batteries from Quantex Battery in China. they were reasonably priced courier was expensive but ok. problem is all 3 see to have distance issues like they were 8ah. 25km return trip max not good for NZ. can I import from Canada to NZ.
size i need is 36v 10ah or larger that fit in my battery compartment L 210 x W 100 x H 70.
I am a first time electric bike owner its a xiongying tdl2003 i am needing a cheap battery for it its a second hand bike and its my starter and ned to get it running but do not know a lot about it yet but intend to build up to something better at some stage could anyone please advise me apart from scrapping it lol Thank you Robbie
James Horning says
I have a Adventurer 20″ electric Bike it operates with a E-Bike Battery Li-ion 24 Volt 9000m Ah/216Wh Where do I go for a replacement?
This article was very informative which I enjoyed reading, Thank you.
Yes I brought third bike from NYCeWheels. Beside I recommend because The wonderful end result is a big box with a beautiful new bike arriving at the door in Florida. It is always a pleasure, NYCeWheels, thank you.
Michael Butkus says
NYCeWheels closed for good a few months ago
Great article, Richard.
This was very educational. In the future, the ebike industry needs to get some things standardized. In a few years, there are going to be landfills full of frames and motors because the parts replacement can’t be done because of non-standardized items. If I want a better Yamaha motor I can’t replace the PW-X with the newer PW-X2. It isn’t drop-in replaceable. I would have to buy a new ebike if I want the better spec’d PW-X2 motor. This has to change.
I agree, it is like everything else when some new item comes in and there is competition. Everyone has their standard and none of them are compatible with others. We need to get a standard to make ebikes last longer and hopefully have universal chargers along side the road.
Yes battery repair
Hi Pete I’m new to this blog interested in a planet gear issue with my izip e3 2015 ebike grinds when pedaling need info on replacement parts and manual since it is not under warranty and I cannot find someone local who can fix it if you or one of your readers can assist I would much appreciate it I live in Edison nj thanks