{STANDARD 9V BATTERIES} LP 9V Rechargeable battery pack, 4 pack of 9V 600mAh rechargeable battery, lighter and more powerful lithium-ion battery. {MONEY SAVING} The rechargeable 9V battery in the combined set is more favorable and practical. One LP 9V battery is greater than or equal to 1200 dry cells. By reusing batteries, reduce waste of disposable 9V batteries. {Low Self-Discharge} The LP 9 volt batteries no memory effect, improved low self-discharge makes it still maintain 75% of capacity after 3 years of non-use. {ADVANCED SAFETY PROTECTIONS} LP 9V rechargeable Li-ion battery has Over-Charge Protection, Short-Circuit Protection, Over-heat Protection, Over-current Protection and Over-voltage Protection with CE and RoHS Safety Certifications. {SERVICES} 30 Days Free Refund & 1 year after-sales service. 24H Promptly and Friendly Response (Weekdays). LP 9V Rechargeable Battery Pack, 4-Pack 600mAh Li-ion 9 Volt Battery for Alarms, Wireless Microphones, Smoke Detectors, Toys, Flashlights, Guitar, Keyboard & More