Both my leisure batteries were replaced after 3 years under warranty. I took it in on the last day before the warranty expired and they tested them after I complained that they were discharging at the rate of 10% a day with nothing connected. we now make sure that they are topped up at least once a month with a 24hr charge.
I imagine if they have been on for 7 years you have been very lucky.
I imagine if they have been on for 7 years you have been very lucky.