Hi. I am trying to maintain a lithium battery for an ebike I am not using. With other batteries I just plug a wire into the kettle and use them to boil water from time to time. But this battery has a very difficult to get at connection. So I have plugged in some USB power drainers - eg my phone - in order to draw some current off it little by little.
My question is, will this work? My concern is that the 5v is taken off one cell. My hope is that the 5v feed is taken from the BMS and so will gradually take charge from the whole system, and thus keep the battery in good shape.