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Hi, I am building a LiPo 7S bike battery charger. Rather than taking the conventional approach of charging the bank from its two ends and bleeding individual cell banks if they rise above the average, I want to charge all cell banks individually with a TP4056 or similar charge controller. I am...

So I've salvaged a number of 18650s from unused laptop batteries. Their capacities range from 1,800 - 2,500 mAh. Their internal resistance varies from 50 - 150 mOhms. I want a 10AH 7S (nominal 24 - max 29.2V) battery. My question is how best to organise those cells. I've read that you can place...

Hi, I've been running a second-hand E-bike for 7 months. The battery had no BMS and was charged (not balance charged) using a power brick. It's a 24V system, the battery was homemade and is 7S5P. I've just stripped it down and can report that, when charged, the cell banks show 4, 3.9, 4, 4...

Hi folks, I have bought a second-hand E-Bike a 24V Dawes Boost City. It has a KZQW22A controller in it. All works well, except that the maximum speed is set to 13.4 instead of the legal maximum. I am wondering if there is anything I can do to nudge it up to the max. The manufacturer's website...