I have about 25 UPS' I picked up at a local university sale for $30 total.
The
largest was a 2KW unit with 18 12V batteries, one of which was dead :-).
Metalworking content - after replacing the one bad battery I tested it
using my bandsaw....
- Bob Headrick
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Bob , Interesting info ; can you confirm that the 18 pcs 12V battery were
in fact 9 strings of 2 batts in series (each string having a fuse )
providing 24 V ? or were all the 18 batts in parallel ?

Frank GMØCSZ / KN6WH