36V vs 48V vs 52V E-Bike Chargers
Quick answer
A 36V battery uses a 42V charger, a 48V battery uses a 54.6V charger and a 52V battery uses a 58.8V charger. These chargers can share the same plug, so check the volts on your old charger's label before you buy.
Why the charger number is higher than the battery number
A battery's name (36V, 48V, 52V) is its nominal voltage. A full lithium-ion pack sits higher than that, so the charger outputs the full-charge voltage: 4.2V per cell in series.
36V packs have 10 cells in series (10 × 4.2 = 42V). 48V packs have 13 (54.6V). 52V packs have 14 (58.8V).
What happens with the wrong voltage
A charger with too high a voltage can overcharge the pack. A charger with too low a voltage will never fill it. Many 48V and 52V chargers use the same 3-pin XLR or barrel plug, so a wrong charger can still plug in.
Amps
Amps (A) set charging speed. A charger with equal or lower amps than your original is the safe choice. Only use a faster charger if your bike's maker lists it for your battery.
Related pages
FAQ
- Can I use a 54.6V charger on a 52V battery?
- No. A 52V battery needs a 58.8V charger. A 54.6V charger will not fully charge it.
- Can I use a 58.8V charger on a 48V battery?
- No. That would overcharge a 48V battery. Use a 54.6V charger.
- Where do I find my battery voltage?
- On the battery label, in your manual, or on your old charger's label as the output voltage.