Amazon.com: Tenergy TN141 2 Bay 9V Smart Charger with 4 pcs Centura Low Self-Discharge 9V NiMH Rechargeable Batteries : Electronics
High Capacity NiMH Rechargeable 9 Volt Battery
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