?Widely Used?9V batteries without memory effect, provide steady voltage. Suitable for smoke fire alarms, metal detectors, microphone, electronic toys, game controllers, clocks, remote controller detector, GPS, LED lighting devices, walkie-talkie, multimeter, home security devices etc. ?High Performance?9 Volt Lithium battery long lasting Li-ion batteries provide steady voltage until the whole cell is depleted, can provide stable power and longer operating time for many devices used at high frequency. Wavypo 9V rechargeable batteries with longer battery life and fast charging capability. ?USB Charging Design?9V rechargeable batteries has built-in USB charging port and provided 2 IN 1 fast charging cable (which can be connected with most USB source like PC, car charger or power bank etc). Convenient to charge anywhere directly with provided USB cable, you don’t bring extra battery charger, the build-in LED lights allow you to check the charging status. ?High Quality?The 9 Volt rechargeable battery is uses high quality grade A battery and manufactured and tested under strict quality control standards. Build-in microchip to prevent over-charging, over-discharging, short-circuit and over-heating. Multiple-protection for safer operation for both user and devices. Environmental protection material reduce heavy metal pollution. ?High Capacity?The 9V rechargeable batteries have longer battery life than disposable alkaline batteries, economic and saving your money. Brand New 0 Cycle battery cell capacity to store more power, bring more standby time, it will provide you over 1300 charging cycles with high-speed and efficient charging.