9V Lithium battery: 6300mWh long lasting Li-Polymer battery without memory effect, provide steady voltage until the whole cell is depleted. 1500 times deep charging & discharging cycles with high quality ensured. Quick charge in 2 hours: Advanced iQuick charging technology with DC 5V/1A USB input, the batteries are full charged in 2 hours, save time and more efficient. Unique USB Charging Design: Convenient to charge anywhere directly using a Type C USB cable, no need extra battery charger. The build-in LED lights allow you to check the charging status. High Performance: Li-Po batteries with 6300mWh / 700mAh capacity, support stable power and longer working time for high frequently used devices, such as smoke/fire alarms, guitar, toys, GPS, home security devices, medical devices etc.