I researched Lithium Ion Batteries after getting this as a gift, they are the best rechargeable batteries, especially in cold weather. My first trip with it was a 5 night river float in November, we had some snow, some rain, some sun and I used it for about 3 hours each night, expecting to have to solar charge it but didn't have too. It worked great even on the cold nights it snowed. Another thing
This review was written in the old system and had content requirements that are different than reviews written today.