Charging Module Battery Charging Board Type-C Step-Up Boost Module 18650 Lithium Battery Charger Module( 4S 4A)
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$ 1.42
Specifications: Input voltage: DC 3-6V (Recommend DC 3.7V 5V) Input current: 4A(4A Version) Charging voltage: 16.8V Charging current: 1.12A LED Indicator: “CR”: Charging “OK”: Fully charged or constant voltage mode