That is a 14650 battery GH batteries are a 12650. In batteries smaller means less power. Don't trust Alibaba for power ratings they are always too high. I own 14650 batteries. They are the same size around as a AA and a bit longer. AA are 14500 sized. If GH had a battery technology that worked even a little better than existing li-ion batteries they would sell it and not vape devices and be very wealthy. First 2 numbers in battery size are diameter and next 2 are length. When they started this they already had batteries. Where did they come from?