I am the second owner of a Dethleffs Esprit Comfort which was new to its original owner in August 2016. It has covered 12,000 miles. We added 4k of the 12k since May 2018. A month in the Outer Hebrides, two weeks on the Isle of Mull and five weeks touring France proved no trouble until towards the last week when we suffered power issues. On our return the leisure batteries were tested and failed to hold a 12v charge. They are original fit 95 Ah Vartas.