I have a Un-Interruptible Power Supply with a dead battery.
Am I correct in thinking that I could remove the dead 7AH gell-cell and run the wires outside to a bigger battery for longer stand-by time during an outage?
I have some 25AH batteries here I could use. The 7AH gave me about 5 minutes so would the 25AH give me roughly 3 times as long during an outage?
Would I also need to add a float charger to the 25AH to supplement any shortfall in keeping the 25AH fully charged until called upon.