I bought an Elecsol in 2001 as we had just had a mover fitted to our new van. The van was an Abbey (Swift Group) that had a charger with a switch that alowed the user to select charger, battery or car, together with a meter showing current charge of battery. After looking at van instructions I decided to switch to battery when on site and let battery discharge until it arrived at red when I then switched to charge where I would leave it until I was back at top of green. After 2 seasons the battery failed. I contacted Elecsol and despite the 5 year warranty got nowhere. Not good customer service. I then contacted the dealer who had sold me the battery and they told me to bring it back ASAP. I did this and they replaced the battery and put the old one on top of a pile of dead Elecsol waiting to be returned. Having said that the replacement Elecsol is still working 8 years later and has just been checked by my dealer during van service is is OK. This is the 3rd van it has been used on all with movers.
After first failure I would not have contemplated buying another. However the replacement has lasted 8 years and is still going strong so I would probably buy another. I have however learnt that these batteries need to be returned to full charge as soon as possible after use. On my last Swift I used to switch to charger when on site so that the battery was not discharged. My latest van a Bailey has a different system with the charger always working when the van is plugged in to the mains.
My advice would be make sure you buy any battery from a reputable dealer who you can go back to if you have any problems, and keep the battery fully charged whenever possible.