Advantages of this XW-116 power bank:
Batteries are replaceable
Batteries are put in parallel, without the problem of battery balancing
Accommodates one to six 18650 batteries
MCU-based design with easy operation
Dual outputs: USB 5V 2100mA and DC jack (3.7V-12V selectable)
Four LED indicators showing capacity and charging status
Specifications:
Output 1:
USB 5V 2.1A (with voltage selector at 5V position)
Output 2:
5.5 * 2.1-2.5mm DC jack:3.6V/2.5A; 5V/2.1A; 6V/1.8A; 9V/1.1A; 12V/0.6A
Charging in via micro USB port
Dimensions: 16.2 x 8.2 x 2.2cm
Weight: 95 grams