Model: 21700 Capacity: 3750mAh Constant Current: 40A Nominal Voltage: 3.7V Charging cut-off voltage: 4.20±0.05V Internal resistance: 30mΩ Safety protection: Based on UL1642 standard, no leaking or explosion in extreme tests of over charging, short circuit, over discharging, high temperature Standard charging current: cc/cv(<=3A) Fully charged time: down to 2 hours(by using Golisi charger Cycle times: >800 Operate temperature: Charging(0-45℃), Discharging(-20-60℃) Storage Temperature: Room temperature, dry place Battery Safety Basics Do not overcharge or over-discharge. To combat this, do not leave your batteries in any charger without supervision. Make sure that you are able to see or check on the charger every 15-30 minutes. This way when the charger indicates that the batteries have been fully charged, you can remove them from the charger. Leaving batteries in a charger all night long or longer can cause them to be overcharged, which can result in battery failure. Charging your battery over 4.25 volts can shorten its life-cycle and going over 4.5 volts can cause it to burst. Cease using your charger if this ever happens. Recharge batteries with a resting voltage below 3.6V as soon as possible. Leaving Lion batteries in a discharged state will incur irreversible damage – creating a loss in capacity and a loss in cycles. 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.
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