Originally Posted by
noglider
I've had good service from several Cygolite Hotshot tail lights. One of them stopped holding a charge after less than two years, and that didn't seem right. I wrote to the company, and they said it would be $15 to replace the internal battery, so I said it's a deal. I sent in the light. They sent me a brand new light instead of fixing it. I'm satisfied!
LiIon batteries have a finite life, but overall, they're worth it.
I have to use Li Ion cells in my Canon camera, and it's best to backlight as much as possible and avoid using the flash or you're charging it again quickly.
Most cameras that use them have replacements available whether from the maker or a generic version. Like I said though, not in cold climates, regular and alkaline cells are probably best.