"off-topic example: I've been told that it's best to recharge a computer or cell phone's battery by letting the computer or phone get to its lowest battery "juice" level, then charge it. someone had said that that's because the battery will "memorize" the last levels and get used to that & only charge to that, so you'll never get the battery to its full battery potential). I don't know if that's a bunch of bologna or if it's true, so I'm asking all you guys who can explain what's the BEST thing to do for recharging a battery. "

To a first approximation it's hooey for any battery. The original "memory effect" was observed in very specialized circumstances (NiCd, satellites, discharge to precisely the same level repeatedly). Mostly we see what *appears* to be this effect, because our devices (computer, cell phone, ebike) *estimate* the state of charge (which isn't directly observable! especially with LiON batteries) and the algorithm(s) we use have serious limitations. Unfortunately, vendors never seem to provide a "reset" which leads to advice to "fully discharge" ... this doesn't help the battery (as in the original NiCd situation) ...indeed it damages it! But it does reset the "learning algorithm".