❤9V Lithium-ion Rechargeable Battery: Recycle>500 times; Kratax new 9V 850mAh lithium-ion rechargeable battery provides longer use time per charge, with larger capacity and ultra long lasting. Last 3 times longer than NiMH Battery, Alkaline Battery ❤Multi-Protection: CE/RoHS Certified. Built-in Protection over-charge, over-discharge, short-circuit, reverse polarity, over-voltage, over-current and over-heated, to make sure the safety for over-night charging ❤Applicable equipment: Suitable for Transistor Radio, Walkie-talkie, Remote Control Toys, Smoke Alarm, Smoke Detectors, Guitar, Wireless Microphone, Multimeter, Cameras, Alarm Clocks, Portable Radios and other electronic and medical equipment ❤Independent charging Channels: One battery can be charged separately, without the need to charge in pairs. With USB Type-C charging cable that can fully charge 4 batteries in about 4 hours. The actual voltage of full charge is 8.4V-8.7V, not 9V, so that the output current can reach 2.3A ❤Package: 2 × 9v batteries(Charger not included)