kevtherev wrote: thing is if you don't fully discharge it regularly (lower than 11 volts) then it will last for a while
Agreed, but I bet many of us have done as I have, left summat on by mistake and flattened it
They must sell a lot of batteries to folks (like me in the past) that have done that ! If you want to avoid flattening it (and having to buy a new leisure every year !) fit a "low voltage cut off" unit. @ ~£20. They are well worth the money if it means your leisure battery lasts 6 years instead of one
They isolate the battery from any loads when the voltage falls below a pre-set value, I have mine set to 11.9 volts. Info here By the way, if anyone reading this buys one of those, the instructions re-wiring up are a bit vague. I have a background in electronics, so I figured it out. If anyone needs to know how, ask me.