【9V Lithium Battery】 Rechargeable 3960mWh long-lasting lithium batteries without memory effect, provide steady voltage until the whole cell is depleted. 【Quick Charge in 2.5 Hours】 LDSMNLI 9V Li-ion batteries with 3960mWh capacity, up to 500 times deep charging & discharging cycles which can be fully charged in 2.5 to 3 hours, saving time, and being more efficient. 【USB-C Charging Design】 The Lithium-ion rechargeable battery has a built-in Type-C port, which is convenient to charge anywhere directly with the provided 4 in 1 USB-C cable, no need extra battery charger. The built-in LED lights allow you to check the charging status. 【Safe Protection 】 The 9V lithium battery features overshoot, over-discharge, overcurrent, overvoltage, and short circuit protection. It can ensure your safety during use. 【Widely Application】 LDSMNLI 9V lithium battery is widely used in household devices, supports stable power and longer working time for highly frequently used devices, such as smoke/fire alarms, wireless microphones, toys, GPS, home security devices, medical devices, etc. LDSMNLI 1100mAh rechargeable 9V li-ion battery solves the problem of powering any device requiring 9V batteries. It withstands up to 500 charge cycles, so 1 LDSMNLI battery replaces 500 disposable ones, which would harm the planet with their chemicals! To charge it just plug USB Type-C cable into LDSMNLI lithium battery charging port and connect cable to any USB charger or port, and it will be fully charged within 2.5 to 3 hours. LDSMNLI rechargeable 9V li-ion battery is widely used for everyday devices, perfect for use in wireless microphones, wireless video game controllers, electronic toys, smoke/fire alarms, metal detectors, remote controller detectors, professional audio, GPS, LED lighting devices, walkie-talkie, multimeter, home security devices, medical devices, etc. Note: Not applicable to devices with power supply current demand greater than 400mA. You will get: LDSMNLI 1100mAh 9V Li-ion battery*4 + USB Type-C cable*1