I'd argue just recycle the batteries and have a proper UPS or backup generator. If the batteries are still good, resell them to people who could actually use th

I'd argue just recycle the batteries and have a proper UPS or backup generator. If the batteries are still good, resell them to people who could actually use them. Otherwise, drop them off at a recycling center. Using them as servers, the batteries wouldn't be doing anything 99.9% of the time, and the constant charging and heat would simply kill the batteries. Simply wasteful.