USB Rechargeable 9V Batteries Backup Replacement Square Battery Power Pack 650mAh Doorbell Batteries Microphone Batteries 8 packs

9V Battery: 650mAh long-lasting battery, without memory effect, can provide stable voltage until the entire battery is depleted. Up to 1800 charges: Compared to disposable alkaline batteries, these USB rechargeable batteries have a longer battery life, making them more economical and cost-effective. 3-hour fast charging: Advanced iQuick charging technology, using DC 5V/1A USB input. The battery can be fully charged within 3 hours, saving time and improving efficiency. Unique USB charging design: With the included 2-in-1 micro USB cable, you can easily charge directly from anywhere. No additional battery charger required. The built-in LED light allows you to check the charging status. High performance: With a battery capacity of 1200mAh, it can provide stable power and longer normal operation time for commonly used devices such as smoke/fire alarms, wireless microphones, toys, GPS, home security equipment, and medical equipment.