Lithium Battery Charger - Boost Supply Output

Features:

Input voltage: 4.5-8V

Output voltage: adjustable 4.3-27V

Charging current: up to 1A

Discharge current: the maximum 2A (1A Constant)

Quiescent current: about 0.5 mA

Overshoot protection: Yes

Over-discharge protection: None (However, the boost supply has a 2V cut-off boost Input voltage)

Size: 3.3 x 2.3 x 0.9cm

Connecting example, VIN + connect 5V solar panel, BAT + terminal can output 4.2V to charging 3.7V 18650 battery, OUT + side can output an adjustable voltage.