Rechargeable 9V Lithium Batteries 4100mWh with 4-in1 Charging Cable - 6F22 9 Volt Batteries 4 Pack, Over 500 Cycles, for Smoke Detector Alarms, Microphones, Guitar

9V Lithium BatteriesRechargeable 4100Wh high capacity 9volt lithium batteries, no memory effect, provide a stable 9V voltage until the entire battery is exhausted.
3H Fast ChargingLDLDCHI rechargeable lithium 9v batteries have 500 cycles and can be fully charged in 3 hours, saving time and being more efficient.
USB-C Charging DesignLDLDCHI 9 volt lithium ion rechargeable battery has a built-in Type-C port, and the equipped 4-in-1 USB-C charging cable can charge four 9V batteries at the same time, without the need for an additional battery charger. The charging cable can be plugged into any USB power source, such as an adapter, USB plug-in, laptop, or car charger. ( Red light on when charging, green light on when fully charged. )
Multiple ProtectionLDLDCHI 9 volt batteries have a built-in intelligent safety chip to effectively prevent overcharging, overcurrent, overvoltage, overheating, and short circuits. Each LDLDCHI 9v battery has been tested multiple times to ensure safe use.
Widely UsedLDLDCHI 9V lithium batteries are widely used in household devices, providing stable power and longer working time for frequently used devices such as multimeters, microphones, smoke alarms, electric guitars, intercom, GPS, home security equipment, medical equipment, etc.