I believe you can run your kettle with enough watch batteries but as they are DC and the kettle needs alternating current you will need to turn it on and off dead quick while it boils!
Euan
Economic migrant, cultural extremist and religious bigot.
Voltages more or less the same, its the rate at which each delivers this voltage that sets them apart. Yes you can use ordinary battery instead of leisure but it'll go flat a darned site quicker. Frankly there's a world of difference and I've run with both. Truck batts are usually 24volt so no comparison.
Roller paint your camper at home: http://roller.epizy.com/55554/" onclick="window.open(this.href);return false; for MP4 download.
Don't know whether it will fit under your seat, it was fitted in a box in a motorhome originally, you could always lay it down on its side if its too tall?
Spoon jar jar, spoon jar.....have I just entered another dimension?
Sutton Auto Factors ....in Nottingham
County Battery supplies
Boothby's
Maybe Nottingham trailer supplies if you want it to be specifically a leisure battery.
It's not the voltage that is different (between a lorry and a car) it's the overall amp hour rating (current)
A lorry typically has two 12 volt batteries linked in series making the output 24volts but these are normally very heavy duty 120-150ah not your typical 54ah car batteries.