Pale Blue AA USB-C Rechargeable Batteries 4Pack. Lithium Ion rechargeable batteries with convenient USB-C charging port. Just plug in any USB-C cable or use the included cable to charge four batteries at once. Charge Time: 1 Hour, Voltage: 1.5V. Cycle Rating: 1000+ Charge Cycles. Build-in LED charging Indicator. On-Board smart technology provides safe charging no more batteries ruining expensive electronic devices.