2024 New 9V 9900mAh lithium Rechargeable battery USB charging 9 v li-ion Square battery for Toy Remote Control KTV Multimeter Microphone walkie-talkie Main Features: High capacity and long service life Model: 9V USB Battery Type: Lithium battery Capacity: 9900mAh Rated Voltage: 9V Dimension:48*26*16mm Weight: <30g Widely used in RC Helicopter Multimeter Toy microphone intercom massager remote control metal detector smoke detector electric guitar