Don't get caught with flat batteries, get a spare so you can keep powering on.  Connect a 12V car charger lead into the socket to power 15 Litre 12v GFS-A1 or as backup power for the 17 Litre 12v GFS-C1.

The Hydrocell 12 Volt Torch Spare Powerpack for non-Lithium units GFS-L1PP is a rechargeable battery pack designed for use with Hydrocell 12 Volt torches that use non-Lithium batteries. The power pack provides an efficient and reliable power source for the torch, allowing it to be used for extended periods of time without the need for constant battery replacements.

• The power pack has 9 powerful LED lights handy for hi powered light whilst outdoors.
• Charges up easily and holds a charge for months while not in use.
• Sealed Lead Acid Cell.
• Compatible with all 12volt non-lithium units.