Buying guide
Best replacement e-bike batteries
Chosen from what the Amazon listings state, not tested by us. How we pick
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Top picks at a glance
Compare them allBest overall
FEIMOKY HL-4813UK: 48 V 13 Ah, UKCA marked
The only listing here that states UKCA certification.
Check price on AmazonAffiliate linkBest value
SDTYYP XH370-10J Silverfish: 36 V 15.6 Ah
Connector details are clear: 2-pin discharge and XLR charging port.
Check price on AmazonAffiliate linkMost features
Xiseny 36 V 14 Ah 504 Wh: F.lli Schiano fit
The maker states over 78% capacity after 1,000 cycles.
Check price on AmazonAffiliate link
A replacement battery has to match your bike before anything else. Voltage must be the same as the original (36 V or 48 V), the mount must match the frame (Hailong down tube, Silverfish seat tube or rear rack) and the discharge connector must suit your controller. Capacity in amp hours then decides range: more Ah means more distance, but only if the battery's maximum current suits your controller. Measure your old battery and compare the stated size in mm before ordering. Certification marks such as CE, UKCA and UN 38.3 on the listing tell you what the seller claims; ask for the paperwork if it matters to you. Buy a charger matched to the pack. This guide compares seven batteries on those points, using only what each listing states.
All products compared
- FEIMOKY HL-4813UK: 48 V 13 Ah, UKCA marked
- Voltage
- 48 V
- Capacity
- 13 Ah
- Mount
- Hailong
- Connector
- Not stated
Check price on AmazonAffiliate link - SDTYYP XH370-10J Silverfish: 36 V 15.6 Ah
- Voltage
- 36 V
- Capacity
- 15.6 Ah
- Mount
- Silverfish (XH370-10J)
- Connector
- 2-pin discharge, XLR charge port
Check price on AmazonAffiliate link - Xiseny 36 V 14 Ah 504 Wh: F.lli Schiano fit
- Voltage
- 36 V
- Capacity
- 14 Ah (504 Wh)
- Mount
- Integrated tube, F.lli Schiano, ESKUTE
- Connector
- 2-pin discharge, DC 2.1 charge
Check price on AmazonAffiliate link - SDTYYP rear rack battery: 36 V 14 Ah
- Voltage
- 36 V
- Capacity
- 14 Ah
- Mount
- Rear rack (Mifa, Zündapp, Ansmann)
- Connector
- Not stated
Check price on AmazonAffiliate link - X-go Hailong: 36 V 13 Ah, Anderson and XT60
- Voltage
- 36 V
- Capacity
- 13 Ah
- Mount
- Hailong 4-pin down tube
- Connector
- Anderson plus XT60 adapter
Check price on AmazonAffiliate link - WR-TEAM 48 V 20 Ah: Samsung 50GB cells
- Voltage
- 48 V
- Capacity
- 20 Ah
- Mount
- Not stated
- Connector
- Anderson
Check price on AmazonAffiliate link - SZHKDC Hailong: 36 V 13 Ah, named bike fits
- Voltage
- 36 V
- Capacity
- 13 Ah
- Mount
- Hailong 4-pin down tube
- Connector
- Motor output cable included
Check price on AmazonAffiliate link
| Product | Voltage | Capacity | Mount | Connector | Link |
|---|---|---|---|---|---|
| FEIMOKY HL-4813UK: 48 V 13 Ah, UKCA marked | 48 V | 13 Ah | Hailong | Not stated | Check price on AmazonAffiliate link |
| SDTYYP XH370-10J Silverfish: 36 V 15.6 Ah | 36 V | 15.6 Ah | Silverfish (XH370-10J) | 2-pin discharge, XLR charge port | Check price on AmazonAffiliate link |
| Xiseny 36 V 14 Ah 504 Wh: F.lli Schiano fit | 36 V | 14 Ah (504 Wh) | Integrated tube, F.lli Schiano, ESKUTE | 2-pin discharge, DC 2.1 charge | Check price on AmazonAffiliate link |
| SDTYYP rear rack battery: 36 V 14 Ah | 36 V | 14 Ah | Rear rack (Mifa, Zündapp, Ansmann) | Not stated | Check price on AmazonAffiliate link |
| X-go Hailong: 36 V 13 Ah, Anderson and XT60 | 36 V | 13 Ah | Hailong 4-pin down tube | Anderson plus XT60 adapter | Check price on AmazonAffiliate link |
| WR-TEAM 48 V 20 Ah: Samsung 50GB cells | 48 V | 20 Ah | Not stated | Anderson | Check price on AmazonAffiliate link |
| SZHKDC Hailong: 36 V 13 Ah, named bike fits | 36 V | 13 Ah | Hailong 4-pin down tube | Motor output cable included | Check price on AmazonAffiliate link |
Details as stated in the Amazon listing or by the manufacturer. See the current price on Amazon.
The products in detail
No. 1 · FEIMOKY
FEIMOKY HL-4813UK: 48 V 13 Ah, UKCA marked
A 48 V 13 Ah Hailong-style down tube battery with a UK 3-pin charger and stated UKCA and CE marks. A direct swap for Hailong mounts.
In its favour
- The only listing here that states UKCA certification.
- Comes with a UK 3-pin plug charger and a 12-month warranty.
- Rated up to 1,000 cycles, according to the maker.
Good to know
- Discharge connector type is not stated, so check it matches your controller.
- The spec table lists 5.1 kg, which is heavy for a 13 Ah pack.
Listing title: Hailong 48V 13Ah Lithium E-Bike Battery, Up to 1000 Cycles,UKCA/CE Cer...
No. 2 · SDTYYP
SDTYYP XH370-10J Silverfish: 36 V 15.6 Ah
A 36 V 15.6 Ah Silverfish-style battery in an aluminium case for bikes using the XH370-10J pack. Clear connector details.
In its favour
- Connector details are clear: 2-pin discharge and XLR charging port.
- The listing states CE, RoHS and UN38.3 certification.
- Suits 36 V motors of 250 W to 500 W with a 30 A BMS, according to the listing.
Good to know
- Only fits bikes built for the Silverfish XH370-10J shape.
- Cycle life and warranty length are not stated in the listing.
Listing title: 36V 15.6Ah Ebike Battery, XH370-10J Sliver Fish Battery with Charger, ...
No. 3 · Xiseny
Xiseny 36 V 14 Ah 504 Wh: F.lli Schiano fit
A 36 V 14 Ah pack for F.lli Schiano, ESKUTE and similar bikes, with stated cycle life and certification.
In its favour
- The maker states over 78% capacity after 1,000 cycles.
- CE, RoHS and UN38.3 certificates are claimed in the listing.
- Compatible bikes are named, and it states it does not fit the Carrera Impel.
Good to know
- The 15 A BMS limits it to lower-current controllers.
- Fits only bikes built for this specific tube shape.
Listing title: Ebike Battery Pack 36V 14Ah 504Wh Lithium-ion Replacement Removable Ba...
No. 4 · SDTYYP
SDTYYP rear rack battery: 36 V 14 Ah
A rear rack battery for Mifa, Rehberg, Zündapp and Ansmann system bikes. Fits rack-mounted designs that down tube packs cannot.
In its favour
- Named fit for Mifa, Rehberg, Zündapp and Ansmann rear rack systems.
- CE, RoHS and UN38.3 certification is stated.
- Suitable for 36 V motors of 250 W to 500 W with a 20 A BMS, per the listing.
Good to know
- The discharge connector type is not given in the listing.
- The size is listed as a string of figures that is hard to read, so compare carefully.
Listing title: Ebike battery 36V 14h / 48V 10.5Ah Electric Bicycle Batteries Rear Rac...
No. 5 · X-go
X-go Hailong: 36 V 13 Ah, Anderson and XT60
A 36 V 13 Ah Hailong down tube battery with both Anderson and XT60 connectors in the box. Good for conversion kit owners.
In its favour
- Both Anderson and XT60 connections are included, which avoids extra wiring.
- A 4-pin base plate, lock and keys come with it.
- Built from 50 cells of 2,600 mAh with a 25 A BMS, according to X-go.
Good to know
- No certification marks such as CE or UN38.3 are stated.
- Charging takes around 6.5 hours with the supplied charger.
Listing title: X-go 36V 13Ah Ebike Battery, Hailong 1 4Pin Lithium Battery Pack for M...
No. 6 · WR-TEAM
WR-TEAM 48 V 20 Ah: Samsung 50GB cells
A high-capacity 48 V 20 Ah pack with Samsung 50GB cells and a 3 A charger. Aimed at conversion kits with Bafang, AW or KT controllers.
In its favour
- 20 Ah is the largest capacity in this guide.
- Samsung 50GB cells are named, plus a 30 A BMS and 3 A charger.
- The seller says opening the case does not void the 1-year warranty.
Good to know
- Mount type and certification are not stated.
- Battery capacity in the spec table conflicts with the title.
Listing title: R TEAM Ebike Battery 48v 20AH with 3A Charger, USB Port,Built in Samsu...
No. 7 · SZHKDC
SZHKDC Hailong: 36 V 13 Ah, named bike fits
A 36 V 13 Ah Hailong pack that names JASION EB3, Fafrees, Mifa, VAUN and Zündapp bikes, and Bafang or Tongsheng motors.
In its favour
- Lists compatible bike brands and motor makers by name.
- Clearly states it does not fit Bosch, Shimano or Yamaha systems.
- 30 A BMS, base plate, two keys and a motor output cable are included.
Good to know
- No certification marks such as CE or UN38.3 are stated.
- Exact connector type on the output cable is not named.
Listing title: Ebike Battery 36V 48V 10Ah 13Ah Hailong Electric Bike Lithium-ion Batt...
Read before you buy
- What size e-bike battery do you need?Work out what size e-bike battery you need: volts times amp hours gives Wh, then match it to your commute distance, hills and how often you can charge.
- Swytch vs Bafang conversion kitsSwytch front hub kits with a handlebar battery against Bafang mid-drives: fitting, hills, weight, UK 250 W versions and which bike and rider each suits.
- How to store an e-bike battery over winterStore an e-bike battery over winter at the right charge level and temperature, in a safe spot indoors, with a simple top-up routine to protect it.
- How to fit an e-bike conversion kitHow to fit an e-bike conversion kit: tools, dropout and rim checks, the motor wheel or mid-drive, sensors, brake cut-offs and tidy cable routing.
- How to charge an e-bike batteryHow to charge an e-bike battery safely, how long a full charge takes, and the UK fire service advice on chargers, supervision and where to charge.
More buying guides: Batteries, range and fixes
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