> 1. how long they will continue to remain rechargable; and if they begin to hold less and less of a charge. if they are still recharging fine for you after 8 y

> 1. how long they will continue to remain rechargable; and if they begin to hold less and less of a charge. if they are still recharging fine for you after 8 years, that seems pretty good. > 3. how long do they last on a full charge? if use them for camp lights are we going to run out of light after a day ? The batteries last long enough that I can't answer these questions. I will say I don't own any devices like camp lights where battery life is a significant problem. The batteries in e.g. my Apple Bluetooth Keyboard last for months. One thing to be aware of is that the voltage curve is different than for alkaline batteries†, so devices like my keyboard will start giving low-battery warnings when they are still mostly charged. This is legitimately annoying on e.g. macOS where you can't disable the warning. Why I would ever want to replace the batteries before they're actually dead is beyond me. † I don't really know what I'm talking about, this is the explanation I found when I looked up the problem online years ago. > 2. what happens if the rechargable battery is left inside a forgotten toy or device for 7 years? if I find it 7 years later, is it a leaky mess or still viable? this is a big reason "AA's are disposable anyway, who cares" is appealing - we have forgotten batteries all the time. if we forget about a toy and our $3.50/each batteries are ruined we could be buying a lot of these pricey batteries I've been using the batteries continuously for that long and they haven't leaked. I'm not even sure these types of batteries can leak? I'd love for someone who knows more about battery chemistry to chime in here.