Originally posted by InlawBiker Eneloops are great but if you forget to charge them you're equally out of luck. They're hard to find retail, especially if you're far from a metro area.
If you forget to charge ANY battery you are out of luck. Unless you want to waste on always buying non-rechargable batteries and run out and buy more all the time. Then you can be really out of luck.
Eneloops actually hold the charge much longer than std rechargeable NiMh so, as long as there is charge in them you are fine.
As for availability - never had an issue. But then, you only need to buy 1 or 2 sets to start with. It isn't as if you'll go shopping for a set each week!!! 1 backup set charged and ready and exhaust 1 set and the extra life means you are more than covered.
Common sense comes into it.
Lithiums AA's: ok for an emergency if you need to buy them in a pinch. Poor efficiency and resultant high heat output. Not a good choice.