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Those 7amphr gell batteries die pretty quick when attempting to run a compressor fridge. Remember you don't have 7 amp hrs at hand. In practise you have 3-3.5 amp hours at hand.

Any gell/agm...

Jeeze, I had to think for a minute where you were heading with that...but sweet now. Useful for soaking up blood etc:thumbsup:

20L is very small.

But OK, just make sure its a compressor fridge. Anything else (gas, absorption) is a compromise. Compressor can also let you keep stuff frozen if necessary.

If manufacturers...