Okay if it can't be explained in simple terms, could you at least suggest what would be the best ways to charge a phone and laptop? The phone is a MS Lumia and almost 2 years old. The laptop is from Acer and a year old. I follow luciddream's way of charging the devices that was mentioned in post 19, "The old batteries you mention, actually the best it to let them die completely, not just get low. I've had great results with laptop batteries letting them get low, but now dead, before recharging them. Altough 5% may be a bit too low, and 2% def. was. Maybe more like 10%. But I'd let it go lower than 20%." Is this a good way to charge the batteries of the phone and laptop?