saga of decommissioned UPS

Dec 18, 2025 - email to the top executive officer of one of our institutions, saying that we could possibly make use of a decommissioned 10 kVA UPS

Feb 20, 2026 - email "received with thanks". It takes 20 65Ah lead acid batteries, trying to charge the batteries with 12V charger ordered on 25th Feb.

June 29, 2026 - requesting electrical people to wire up the batteries which were individually charged

July 23-26, 2026 - internal resistance testing shows 11 of the 20 batteries are bad, which makes the UPS trip when input power fails. So, decide to not use it.

July 31, 2026 - sent the good batteries to another institution.