24V DC 60W 72Wh 3000mah Rechargeable Lithium Ion, Li-ion Portable Battery Pack, Power Bank for CCTV Cameras, LED Strip Lights and more. With UK Plug Charger: Amazon.co.uk: Electronics & Photo
Nitecore 18650 USB Rechargeable 3500 mAh Li-ion Protected Battery – Torch Direct Limited
Polymer Lithium Ion Battery (3.7V, 1Ah) – Kitronik Ltd