One hour of charging time and a constant 1.5 V are groundbreaking. Say goodbye to disposable batteries and switch to a modern solution instead. Designed for performance, ease of use, and reliability. The AA rechargeable batteries reduce waste, save time, and money. Fast-charging lithium battery with over 1000 charge cycles. Convenient USB-C charging port. Use the included cable to charge 4 batteries simultaneously. Integrated LED charging indicator. The Paleblue batteries show when they are fully charged. The built-in smart technology ensures safe charging. No more batteries ruining expensive electronic devices.