SAMSUNG 40T 21700 4000MAH SPECIFICATIONS:
Approximate Diameter: 21.1mm (max)
Approximate Length: 70.4mm (max)
Manufacturer Rated Capacity: 4000mAh
Manufacturer Rated Standard Discharge Capacity: 3900mAh
Manufacturer Rated Max Discharge Current: 30A
Nominal Voltage: 3.6V
Peak Voltage: 4.2V
Style: Flat Top
Do not let your batteries touch each other or other metallic items. Keeping your batteries loose, such as in your pockets, is a good way to have your batteries fail and seriously harm you. There are battery holders and covers to keep your batteries safe. Get some – now.
Do not dispose any battery in a fire. There are dangerous chemicals in batteries. If you try to burn your batteries they’ll release dangerous fumes and will probably explode. Do yourself, and the rest of the world, a favor by taking your old batteries to a battery recycling center.