Question about battery for Ebike

[Vikingimike01]

Thank you!

 

[Vikingimike01]

I am not planning on needing all that 5kw.

Nope. You are planning to need much more. You just don’t know yet.

Hey you were right I have my 5kw and it goes 50km/h lol, I got my drivers license and I can use it as a motorcycle now. The guy sent a 100Amp one instead of teh 120amp one in the kit!!!! Kinda mad!! Not sure if that would increase max speed... 20+ amps

 

[MadRhino]

You need lots of power to benefit full advantage of a big hub motor. If I was building with that motor, the battery would be suitable to feed 500A. This means that using low C rate cheap cells, you will have to carry them in a trailer after your bike is filled with all it can hold.

Stop buying cheap batteries, or replace your big motor with a smaller one. Compare with combustion engine performance: if you build with a 1000 hp motor, you must plan high octane gas and a big fuel tank.