The Efest Slim K1 is a portable single slot charger with micro usb input and 1amp charging capability. The Efest Slim K1 LED indicates when your battery is charging and when it is fully charged.

Features and Specs:

Compatible with: 10440, 14500, 14650, 16340, 16650, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 26500, 26650
Portable Design with Quality Piano Strings
Battery Life LED Indicator Light
Single 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"