2Pcs 18650 Battery Holder Li-ion Battery with Single Compartment, 18650 Battery Bank & Battery Backup, Support USB 5V/2A 3V/1A Battery Shield Charging Module with USB to MicroUSB Charging Cable

This 18650 lithium ion battery module serves as an 18650 power bank, battery bank, or battery backup. It incorporates a built-in 18650 battery holder and provides Type A USB output and micro USB input. The power module is compatible with 18650 rechargeable batteries and delivers 5V/2A and 3V/1A output, functioning as a 5V power source for a variety of devices. It contains overcharge and overdischarge protection for secure operation as an 18650 battery charger. Connect according to the positive and negative markings on the product; reverse connection is not allowed. The product contains 2 sets of the battery shield module and a USB cable, perfect for DIY projects involving components powered by 18650 batteries