9V 650mAh li-Ion Rechargeable Battery USB Charging Square for Toy KTV Multimeter | eBay
Amazon.com: EASTAR BTS 9V Batteries - Alkaline 9 Volt Batteries (2 Pack) for Smoke Detectors, Long-Lasting Power for Low Drain Devices, 6-Year Shelf Life, All-Purpose Square Batteries 6LR61 for Household Office :
Amazon.com: 9V Lithium Battery, High Capacity 1300mAh,with 2 in 1 USB Charging Cable, (2024 New Version)Rechargeable 9 Volt Square Batteries for Smoke Detector/Alarms,Metal Detector,Multimeter(4 Count 9V) : Health & Household