These are high quality, rechargeable 21700 batteries from Efest, rated to have a 3700mAh capacity and a discharge rate of 35A. These batteries are only for use in mods that explicitly state compatibility with these batteries.
Please note that 21700 batteries are not compatible with 18650 mods.
Check out our Battery Safety Guide for tips on keeping your batteries in tip-top condition.
35A Max Discharge Current