Trust USB-C 9V Battery Rechargeable, Built-in USB C Port, No Batteries Charger Necessary, 4.44Wh Capacity, Recharge via Phone Cable/Charger/USB Port, Square Battery for Smoke Alarm Detector

BATTERY, BOOSTED - Do yourself (and the planet!) a favour with this 9V battery. Rechargeable via any USB-C cable or phone charger, you'll never need disposable batteries again! READY TO RUN - Keep devices like smoke alarms, RC toys, and portable radios running with this battery's 4.44Wh capacity, ensuring reliable power when you need POWER HOUR - Don't wait to get your devices ready to go. Fully recharged within just four hours, these batteries ensure you're back in action in as little time as possible GET THE GREEN LIGHT - Stay in the know with the green LED battery status indicator. Flashing when charging and steady when charged, it immediately lets you know when your battery is ready to roll MORE THAN A MEMORY - Unlike conventional NiMH batteries, this battery has 1200 charging cycles and doesn't lose capacity from partial charges, meaning you always get full power