3pcs 3.7V 4.2V 5V 100mA Micro-Lipo Charger USB Battery Charging Board Micro-B Connector Lithium for LiPoLiIon V1

Features:5V input via Micro-B USB connectorFor charging single 3.7/4.2v batteries (not for older 3.6/4.1v cells)100mA charge current, adjustable to 500mA by soldering a jumper closed3 charging phases:Stage 1: a preconditioning charge, then a constant-current fast charge and finally a constant-voltage trickle charge to keep the battery topped-up.Stage 2: The charge current is 100mA by default, so it will work with any size battery and USB port.Stage 3: If you want you can easily change it over to 500mA mode by soldering closed the jumper on the front, for when youll only be charging batteries with 500mAh size or larger.Package Includes:3 x module