imho any good auto service will test them for free. 2 items i have though
1. no need to go through all that trouble. if a battery looses water there are other factors.
its a cheap battery
its over charging boiling the water out
or its old
a good interstate battery (for example). is maintenance free. and sealed. no need to open.
2. NEVER lay your tools across a top post battery. you'll find out real quick how good or cheap that battery really is....lol
A+ for effort...