The Cygnett AAA USB-C Rechargeable Li-ion Battery (4 Pack) (model CY5874CCCRB) is a modern, eco-friendly alternative to traditional single-use alkaline batteries. Unlike standard rechargeable batteries that require a separate wall cradle, these batteries feature a built-in USB-C port directly on the battery body for convenient charging. Power that comes back stronger No more last-minute trips to the store to replace old batteries; these batteries restore power to things that matter most such as toys, remotes, clocks & work peripherals. A smarter choice Recharge each battery up to 1,000 times. That means this four-pack replaces the need for up to 4,000 single-use batteries over its lifetime. Make the smarter choice for both your wallet and the environment. Charging cable included Recharge all four batteries at once using the 4x USB-C Charging Cable. Make it a bundle Pair with the Cygnett 20W USB-C Wall Charger and have everything you need for a smarter way to power your everyday. * Only use the included cable to charge. Only use with a suitably powerful wall charger from a reputable brand. Do not leave the batteries on charge once charging is completed. Do not leave the batteries unattended while charging.