Nothing at all to do with our cars but my office in the UK reports that one of our UPS's is reporting a dead battery. With all the batteries in our cars, perhaps we can find the answer here? We're running huge UPS's in our data floor there and the UPS says ONE battery (in one UPS) has failed. One of 32. Problem is on inspection all battery trays read 108 volts. Yet during a self test, we're told ONE has failed. Rather than recycle 32 batteries and buy 32 more at £15 each, is there a way to determine which one is gone / going bad? Not just the money, these batteries are 2 years old; pity to throw away 32 when only 1 needs replacing. Voltage is good ... what do we look for?