Using oversized "dead" batteries
I've noticed that some forklift companies will consider their batteries "dead" if they can't hold on to 80% of the rated capacity. So I was wondering whether you can still use such batteries if you oversized them? I.e. if I needed 500Ah in my RE system and I found a 900Ah forklift battery that was considered "dead" because it only held 700Ah of charge - would it still have a good useful life as a 500Ah battery?