Features:
1. Place 4 batteries, detachable, with 4 charging cables, and solder free DIY battery case.
2. Widely compatible: suitable for 18650/18700/20700/21700 battery power supply. Not limited to 18650 (excluding batteries)
3. Unlike traditional non detachable battery cases, this push-pull design allows for repeated opening and easy replacement of battery cells.
4. With a digital display, you can see the battery level, making it convenient to replenish the battery in a timely manner. It comes with USB/Micro/TYPE-C/and an interface suitable for the iPhone.
5. Compact and convenient, it is a good companion for home/outing/outdoor sports.

Attention:
The purchase of this product does not include batteries and requires additional purchase. Batteries have a lifespan. Broken skin batteries should not be used again. If the internal resistance of the battery is too high after a long time, it will increase and affect the normal boosting of the motherboard and the current limiting of high-power output loads. It is recommended to use a new battery. Before purchasing, first confirm that the voltage is between 3.2V-4.2V. Do not place the battery upside down incorrectly.

Specifications:
Applicable battery: 3.2V-4.2V voltage/18650/18700/20700/21700 battery
Output voltage: 5.2V
Output current: 2.1A
Input voltage: 5V
Input current: 2.1A
Cycle life: ＞ 500 times
Working temperature: -10 ℃ -40 ℃
Storage and transportation temperature: -20 ℃ -50 ℃
Size: 125/85/30mm

Product List:
1 * Mobile power supply welding free sleeve material