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Type-C Rechargeable Battery Lithuim Ion 3.7V LED Indicator 1200mAh Capacity Batteries 18500ST Specification Battery Type: Lithium-Ion 18500 Capacity: 100mAh Voltage: 3.7V Charging: 5V Cycle Use: 1200 Times Full Charge: 1.5~2hours Type C USB CHARGING: Directly plug a Type C USB into the input for quick and easy charging. Use the included cable to connect simultaneously connect 2 batteries to any USB power supply. Connect to an AC adapter, power bank or computer, and fully charge in around 1.5 hours. Long lifecycle will allow over a 1200 uses LED INDICATORS: When charging, the red LED will blinks and will then LED remains on once it is fully charged. Conveniently see the charging status of each battery LARGE CAPACITY: 1200mAh capacity provides sufficient power for a wide range of products. Compatible with dog collars and electric meters, home security systems, baby movement monitors dogwatch,alarm systems,laser sight,laser pen and many more