Great piece of equipment, especially if you don't run solar panels. Saves money on batteries throughout the year. Use them frequently on our non-permanent cameras.
I was going through both Alkaline and Lithium AA batteries like monthly. These rechargable one last me about a 2 to 3 months. The ones I have that work with a solar panel has been out in the field for 1 to 2 plus years without needing change!! Well worth the squeeze!!
The thing lasts forever. I don’t really know how long it lasts, because it’s never run down at all before I change camera locations every 3 weeks or so.
My camera snaps about 300 pics a day. Battery was depleted in less than 2 weeks of this kind of work. I don’t have a point of reference to compare it to anything besides AA which seems to have held up roughly the same.