3000mAh NiMH Rechargeable Battery POWO18B, 3.7V Large Capacity Batteries with Case, Perfect for Flashlight, Camera, Small Fan, Doorbell, Toys, Headlamp, and Other Battery Operated (4pack, Red): Amazon.co.uk: DIY & Tools
Nitecore 18650 3.7 V, 2600 mAh Lithium-ion Protected Battery (NL1826) – Torch Direct Limited
600mAh 10440 Rechargeable 3.7V Li-ion Battery For LED Flashlights
ICR18350 Rechargeable Battery 3.7V Li-ion 900 mAh Batteries for Torch, Toys,Pack of 4,PKCELL: Amazon.co.uk: Electronics & Photo
18650 Lithium-ion Rechargeable Cell - 3000mAh 3.7V 15A | The Pi Hut
3.7 Volt Rechargeable Battery, REACELL 3000mAh Rechargeable Battery, Button Top NiMH Battery High Power Long Lasting for Headlamp, LED Flashlight, Solar Light, Electronic Devices etc (4 Pack+Box): Amazon.co.uk: DIY & Tools