Hi folks, hope your all well. I have a 300tdi defender with dual pc1500 odyssey batteries, charged by a ctek split charge with Smartpass, ctek MXS 5 battery Charger when connected to mains and solar power when camping. Sadly, once again, the battery that is connected to the fridge and other none vehicle electricals has died, this is the second one in three years, so is getting expensive. Anyone have any thoughts on what could be causing this???