Package includes: 4 packs of 9 volt lithium batteries
Compatible model: 9V rechargeable battery is ideal for smoke detector, wireless microphone, LED lighting, electronic toy remote, multimeter, electronic guitar, walkie talkie, home security equipment, metal detector, etc
Durable: advanced fast charging technology with DC 5V/2A USB input, the batteries are fully charged in 1.5 hours, saving time and more efficient. Up to 1500 efficient charging cycles.
High performance: 1300mAh 9V polymer battery with improved low self-discharge and built-in multi-circuit and high-quality TI chip to protect against overcharging, short circuit, overheating and over voltage.