4-Pack Rechargeable 9V Lithium Batteries, 4400mWh 9 Volt Li-ion Battery for Smoke Detectors Alarms, 2H Fast Charging 4-in-1 USB-C, Long Lasting 10-Year Shelf Life

Lighter Weight, Higher Energy Density Compared to alkaline or other disposable batteries that are prone to losing efficiency, 9V lithium batteries are lighter, only about 24g ( 0.85 oz), but offer higher energy density, longer battery life, stable voltage output, and better performance in cold or extreme temperatures
Long-Lasting Battery Life Our 9 volt batteries uses lithium-ion cell, stable 9 volt output throughout lifespan. 4400mWh capacity that offers 20% more life than alkaline or NiMH 9V batteries. One 9V battery provides stable power for months, significantly outperforms. No more worries about smoke alarms malfunctioning
9V Battery - Widely Compatible These rechargeable 9v batteries with charger can stably power various 9V devices, such as wireless microphones, smoke detectors, guitar effects pedals, toys, smart door locks, multimeters/blood glucose meters, etc. It' s a reliable power solution for your home or office 9V devices
1200+ Cycles Life & SafeUSB-C Rechargeable 9V batteries with 1200+ cycle life is an cheap choice for long-term use. Disposable batteries must be replaced once fully discharged, more costs. And disposable batteries rely on chemical reactions, easy to leakage. Lithium batteries use metal lithium-ion, safe and environmentally friendly
2H Fast Charge with 4-in-1 USB-C The 9v lithium battery set includes a 4-in-1 USB-C charging cable, offering 2H fast charging. Power 4 pack 9 volt batteries simultaneously using any phone adapter/power bank. No bulky charger needed