EBL Rechargeable 9V batteries High Volume 600mAh Li-ion 6F22 PP3 Rechareable Batteries Pack of 4: Amazon.co.uk: Electronics & Photo
Amazon.com: PKCELL 9 Volt Batteries- 9V Battery 2 Pack for Smoke Detectors and Carbon Zinc Monoxide Detector (2 Counts) : Health & Household
Amazon.com: Kastar 2 Pack Micro USB Rechargeable Li-ion Polymer 9V Battery LI9V Works with Toys, Clock, Multimeter, Digital Camera and Game Controller as 6F22 : Health & Household