4 x Battery Slots

Slim K4

Quad/Four Slot Battery Charger

Cost-effective and easy to use, the Efest SLIM K4 Charger is incredibly lightweight and conveniently portable.

Steel cathodes with low resistance and hard chromium plating processing to achieve a more precise charging voltage.

15,000+ Time spring testing quality warning. The K4 also has 6 protection levels: Short-circuit protection, Automatic over-charging protection, Automatic over-discharging protection, Reverse polarity protection, 0V activation recovery function, Hardware and software double protection.

LED Indicator

After inserting the battery into the slot correctly, the SLIM K4 will charge the battery automatically within a few seconds. The indicator while fully in standby / fully charged is a static blue, and turns white while charging.

Features:

Auto-detect charging current: 2 x 1.0A / 1 x 1.0A / 4 x 0.5A / 3 x 0.5A
Safe charging mode: CC & CV
Safe and convenient USB Charging (5V 2A)
Monitors and charges each slot independently
Low voltage smart activation recovery function
Incredibly lightweight and conveniently portable

Specifications:

Input Power: DC 5V 2A
2 x 1A CC Current: 2000mA +- 10%
1 x 1A CC Current: 1000mA +- 10%
4 x 0.5A / 3 x 0.5A CC Current: 500mA +- 10%
Auto Cut-Off Voltage: 4.2V +- 0.05V
CV Cut-Off Current:Standby Current:Activation Current: 50mA ~ 100mA
Auto Recharge Voltage: 4.1V +- 0.1V
Operation Temperature: 0C ~ 40C
Storage Temperature: -40C ~ +70Cli>Battery Types Supported: 10440 / 14500 / 16340 / 17340 / 18350 / 18490 / 18500 / 18650 / 26500 / 26650 / 20700 / 21700/ul>

EFEST Slim K4 USB-C Intelligent Battery Charger