My horror story also serves as a caution. One morning I came into work and the small UPS under my desk was beeping to alert of a battery fault. No drama I thought so I unplugged it, turn it upside down to get to the battery access panel, I opened it and battery acid leaked out narrowly missing my hand and landed on the floor burning a nice hole in the carpet. So a word of warning, lead acid batteries can fail at any time and be very careful when handling old batteries.
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