Hello all, I have battery bank which I use to charge phone camera etc. I uses a usb cable which has four wires two for power and two for data. I would like to be able to charge small lead acid batteries from it. Has anyone got a way to do this as without the data cables the bank will not supply. I think that I would need to feed the data wires to the bank from a sensing circuit so that the bank knows the state of the battery. Anything on the market?. I must add that I am well over 80 and not fully up to speed on the modern electronics. Thank you all in advance.