RELIABLE PERFORMANCE—No memory effect, improved low self-discharge (LSD) makes it still maintain 75% of capacity after 3 years. One LP 9V battery is greater than or equal to 1200 dry cells. By reusing batteries, you are reducing your carbon footprint and the waste caused by one-time use 9V battery. Li-polymer battery packs with maturer, higher denser, and more stable. PACKAGE INCLUDES— 4x 650mAh 9V Lipo rechargeable battery, 1 x USB charging cable. Convenient to charge anywhere directly with provided micro USB cable, no need extra battery charger. APPLICATION—Suitable for smoke detector/alarms, multimeter alarm systems, digital cameras, calculators, pencil sharpeners, portable radios, guitar pedals/pickups, walkie-talkie, microphones, toy remotes, clocks, flashlights, professional audio devices, medical devices and other high drain electronic devices. Ideal replacement for the everyday 9V battery. ALSO KNOWN AS—9V, PP3, HR22, MN1604, BLOC, 6LR61, 1604AU, X22, 1604, 1604A, 1604AC, 4022, 522, 6AM6, 6F22, 9VOLT, A1604, CLR6, K9V, KA9, ND65V, R22, RB100890 etc. QUALITY SERVICE—We take pride in providing the highest levels of customer satisfaction and we have over 20 years experience in lithium battery business. If you have any questions or concerns regarding our products, please send us a message and we will get back to you within 24 hours. PACKAGE INCLUDES— 4x 650mAh 9V Lipo rechargeable battery, 1 x USB charging cable. Convenient to charge anywhere directly with provided micro USB cable, no need extra battery charger.