E-bike battery
Replace an e-bike or scooter battery only with the maker's pack or a certified replacement it approves. Never use rebuilt packs, and recycle old ones properly.
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Battery and electrical safety. Lithium-ion batteries can catch fire if they're damaged or charged wrong. Never open a battery pack, and stop using any battery that's swollen, hot, wet or smells burnt. Every edit to this page is checked by a second person before it goes live.
The battery is the lithium-ion pack that powers the motor. It is the part where safety matters most.
Never open, rebuild or repair a battery pack, and don't use one that has been modified or reworked. CPSC warns against packs modified or reworked by unqualified people or built with used or repurposed cells (CPSC micromobility center). Bosch says the battery housing must not be opened and that defective packs can't be repaired or refreshed (Bosch battery safety). For battery problems, see Battery won't charge or find a shop.
What it's used for
It stores the energy for the motor and display. Range loss and charging trouble are covered in Battery drains fast and E-bike battery care.
What to look for
- The maker's pack or one the maker approves. CPSC says to use only a battery tested and approved to work safely with your device, with the device maker confirming it is suitable (CPSC).
- Certified to safety standards. CPSC advises batteries certified to the applicable voluntary safety standards (CPSC), and UL Standards and Engagement names UL 2849 as an example standard batteries may be evaluated to (UL Standards and Engagement).
- No packs reworked by unqualified people or built with used cells, whatever the price (CPSC). If the maker no longer sells your pack, see battery rebuilders and replacement pack builders for what to ask before you buy.
Using it safely
- Charge only with the maker's or an approved charger, stay nearby, and don't charge overnight (CPSC). See E-bike charger.
- Watch for damage such as dents, punctures, leaks or swelling, and for heat, odd smells, or hissing and popping (UL Standards and Engagement).
- Store it dry and ventilated, away from heat and sunlight. Bosch gives 32 to 68 °F for storage (Store your battery for winter) (Bosch).
End of life
Never put a lithium battery in the trash or household recycling. CPSC says to take it to a local battery recycler or hazardous waste collection center (CPSC), and Bosch says dealers take back used packs for recycling (Bosch). The Battery Network, the new name for Call2Recycle, runs an e-bike battery program with a drop-off locator and has a section on damaged or defective batteries (The Battery Network). If a pack is recalled, follow the disposal steps in the official notice (CPSC).
Guides that use it
Sources
Guides that use this
- Aventon Level.2, Pace, Sinch and Aventure: battery won't charge in the cold, or W04 on the display
- Aventon Level.2: parts and specs
- Aventon Pace 500.3: parts and specs
- Hiboy S2, S2 Pro and KS4: E5 low voltage error or the battery won't charge
- Juiced Scrambler HT and FS: charger light stays red and never turns green
- Lectric XP 3.0, XP Lite and XPedition: charger light stays red or never lights
- Lectric XP 3.0: parts and specs
- Lectric XP, XP Lite and XPedition: won't turn on, display stays blank
- Lectric XP4, XPeak 2 and XP Trike 2: E006 battery undervoltage, bike stops helping
- Rad Power Bikes RadCity 5 Plus: parts and specs
- Rad Power Bikes RadExpand 5: parts and specs
- Rad Power Bikes RadRover 6 Plus: parts and specs
- Rad Power Bikes RadRunner 1 and RadRunner 2: parts and specs
- Rad Power Bikes RadRunner 3 Plus: parts and specs
- Rad Power Bikes RadRunner Plus: parts and specs
- Rad Power Bikes RadTrike: error 30 or battery light flashing with a full battery
- Rad Power Bikes RadWagon 4: parts and specs
- Ride1Up Core-5, 500 Series, 700 Series and LMT'D: error 21 or power cuts out on long climbs
- Ride1Up Core-5: parts and specs
- Segway Ninebot E2 Pro: error 39, battery temperature abnormal
- Segway Ninebot Max G30P and G30LP: error 21 battery communication fault
- Super73: charger light flashes red, or stays green and the battery won't fill
- Velotric Discover 1: parts and specs
- Velotric Discover 2, Nomad 2 and Nomad 2X: battery indicator lights flashing
- Xiaomi M365, 1S and Pro 2: won't charge, or the charger light stays green when plugged in
- Xiaomi M365, 1S, Pro 2 and Mi 3: error 10 or error 21 communication fault on the display
If these steps didn't fix it, find a shop near you in our partner network. For battery or wiring trouble, look for shops marked Battery and electrical.
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