czvv 9V Lithium Batteries Rechargeable - High Capacity 850mAh Square Battery Li-ion 8.7V - 1300 Cycles, Leak-proof, Ultra Long Life 10 years for Smoke Detectors, Radios, Wireless Microphones (4 units)

Product description

• Higher Capacity, Lower Spend Upgraded 850mAh Lithium cobalt oxide battery with about 2.6x larger capacity than common 9V 320mAh batteries. The eco-friendly concept runs through manufacturing. Say NO to harmful substances together such as Hg Cd Pd. Less than 1% - self-discharge rate of CZVV 9v li-ion rechargeable battery ensures 85% capacity maintenance after 36 months of non-use. Longer 1300x service life - The Energy is About to Shift - a wonderful combination of electricity and chemistry.
• Wide Applications Compatible with most 9V battery-powered devices, like 9-volt smoke sensors, garage door openers, alarm clocks, wireless microphones, radios, electronic toys, flashlights, remote controls, massagers, transceivers, guitars, bass guitars, metal detectors, multi-function instruments, etc.
• Why 8.7V instead of 9V? As we all know, the nominal voltage of a lithium-ion battery is 3.7V, and the full-charged voltage is 4.2V - better known as the charge cut-off voltage. By connecting two groups of 3.8V High-Energy-Density l-i*th*i-um-polymer cells in series, we fabricated K007 with an EnergyCLSave frame. Under ideal conditions, a fully charged 9V battery will maintain a high voltage of about 8.7V(4.35V*2) - the highest voltage among all brands' L*i*ion 9V batteries can achieve so far.
• What You Get CZVV Ultra 850mAh 9V Batteries(2 Count Pack with Output DC 8.7V), our worry-free 12-month warranty, and friendly customer service
• Protect environment Rechargable 9V batteries is more environmentally friendly and efficient than disposable alkaline batteries; Using 9V batteries can reduce waste emissions and protect our environment