Amazon.com: Tenergy 9V NiMH Battery, High Capacity 250mAh Rechargeable 9 Volt Batteries for Smoke Detector/Alarms, TENS Unit, Metal Detector, and More (4 Pack) : Automotive
Amazon.com: Amazon Basics 4-Pack Rechargeable 9 Volt NiMH Batteries, 200 mAh, Long Lasting Power, Recharge up to 1000x Times , Pre-Charged : Health & Household
Amazon.com: Tenergy 9V NiMH Battery, High Capacity 250mAh Rechargeable 9 Volt Batteries for Smoke Detector/Alarms, TENS Unit, Metal Detector, and More (4 Pack) : Automotive
Amazon.com: NEGON 2 Pack 9V Rechargeable Lithium Batteries, 1000mAh 9000mWh with 2-in-1 USB Charging Cable, high Capacity 6F22 Batteries for Smoke Alarms, Electric Guitars, Metal detectors, Microphones More. : Health & Household
Amazon.com: Tenergy 9V NiMH Battery, High Capacity 250mAh Rechargeable 9 Volt Batteries for Smoke Detector/Alarms, TENS Unit, Metal Detector, and More (4 Pack) : Automotive