I think one or both of the cells has failed through old age! They are BB Battery BP7-12 (12v 7AH/20hr) standard UPS calles I guess...The question?... how can I check these batteries for correct function.. the UPS squeaks alarmingly when I try to power it on and a red light shows on the front rather than what I was used to.....!
UPS has lasted 3 years since being acquired vias Ebay for 50 UKP
APC Smart-UPS 700 # NS0051241007
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