Kratax 760mAh High Capacity USB 9V Rechargeable Lithium Batteries Wide Compatibility: Our 9v lithium battery is suitable for various electrical appliances such as Wireless Microphone, Multimeter, Electric Guitars, Walkie-talkie, Toy Remote Controls, Smoke Alarm, Smoke Detectors, Cameras, Massagers, Alarm Clocks, Portable Radios, Transistor Radio. High Capacity: 760mAh Kratax 9V Rechargeable Batteries, 1500+ Cycles ultra long lasting, equivalent of 1500 disposable batteries. 27% more capacity than other USB 9 Volt square 6F22 lithium batteries, 2 hours fast charging, maximum output current 2.3A. Multi-Protection: Our batteries and chargers have passed ROHS, CE, CQC, PSE, etc. certification. Built-in protection device to prevent Overcharge, Overvoltage, Overcurrent, Over Discharge, Reverse Charge and Short-circuit protection, can protect the battery and charger very good. USB Type-C charging port: 5V-2A input, can fully charge the battery in 2 hours. The battery has a built-in USB charging port for charging from laptops, mobile power, car chargers, and other USB devices anywhere, anytime. The battery also can be charged with a 9V battery charger, which is not possible with most products on the market. Low-carbon and environmental: It does not contain any toxic and harmful heavy metal elements and substances, such as lead, mercury, and cadmium. Low self-discharge, is about 0.03% per month, which is less than 1/100 of Ni-MH batteries, the weight of our battery is 30% lower than Ni-MH batteries. Type-USB to Type-C cable Charging via USB cable, as long as there is a USB interface can be charged. Constant current mode to prevent current fluctuations on the impact of the battery. The positive and negative electrodes of the battery adopt high-quality conductive metal caps, which are anti-rust and anti-oxidation. Suitable for various electrical appliances such as Wireless Microphone, Multimeter, Electric Guitars, Walkie-talkie, Toy Remote Controls, Smoke Alarm, Smoke Detectors, Cameras, Massagers, Alarm Clocks, Portable Radios, Transistor Radio.