I replaced the battery on my trad Plus8 earlier this year. Like for like Odyssey. The old one was on the car when bought 10years previously. I don’t know when that was originally put on but 10 years is a good life! It was connected to a Ctek when garaged and no problems until a sudden fail to turn the engine. It wouldn’t hold a charge. I hate that type of fail to start. GRRR. Regular checks on battery connections ( especially earths) was a normal routine.
Choice was cheaper battery and expect shorter life or go Odyssey again. Chose the latter. Based on experience and reputation. Been good since.
In 2002 I bought (imported from dealer in Ostende) a Focus td for commuting. Kept for 12 years. Battery lasted 9 so not bad.
On my first Mog, a 1993 4/4 I had to overhaul the earths. A jump lead from battery to starter worked so it was an earth problem. New earth straps, cleaned contacts, stainless mounting bolts and petroleum jelly over those. Bingo!
