Efest K1 Single Bay & Efest K2 Dual Bay Battery Slim USB Charger USB External Battery Charger. Each Charge slot is monitored independently by the internal chipset to ensure efficient and safe Charging, as well as this, the Chargers have a handy LED display that indicates the current level of charge in each Battery, helping to ensure that you know when a battery is at full charge. The Efest K Series features protection in the case of reverse polarity, short circuit and overcharge, adding that extra level of Safety whilst Charging On top of that the K Series Charges at a constant 1A. which also ensures that your batteries are being charged at the appropriate rate, providing a longer life for your Batterie.

Efest battery charger specifications
Compatible with: 10440, 14500, 14650, 16340, 16650, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 26500, 26650
Portable Design
Battery Life LED Indicator Light
Dual Slot 5V/1A Micro USB Charger
AC Input Power: AC 100~240V 50/60Hz
DC Output Power: DC 5V 1A
DC Input Power: DC 5V 1A
1A CC Current: 1000mA (+/-10%)
Auto Cut-Off Voltage: 4.20 (+/-0.05V)
CV Cut-Off Current: <100mA
Standby Current: <20mA
Activation Current: 50mA~100mA
Auto Recharge Voltage: 4.10 (+/-0.10V)
Operation Temperature: 0C ~ 40C
Storage Temperature: -40C ~ 70C

Package contents
1x Efest Slim K2 or K1 Charger
1x Micro USB Cable