I have just put 2x 7.2Ah 12v sealed lead acid batteries into one of my UPS's after servicing them (they were recovered from old equipment and were badly drained). I refilled the cells, charged them up and they test okay. The UPS is an 'Opti-UPS 1000C', 24v (2x12v) after connecting it up, I can hear the batteries bubbling as they take the charge current and measure at 28.5v on my DMM.
Question is... Does this seem okay? When charging the batteries, it's always said leave the cells uncapped to let the gas escape and avoid pressurising the cells and causing the battery to explode. However this is not possible in a UPS and I have never noticed the batteries bubbling in any of my UPS's prior to this.
I'm having visualisations of a battery exploding and covering me in sulphuric acid!
Question is... Does this seem okay? When charging the batteries, it's always said leave the cells uncapped to let the gas escape and avoid pressurising the cells and causing the battery to explode. However this is not possible in a UPS and I have never noticed the batteries bubbling in any of my UPS's prior to this.
I'm having visualisations of a battery exploding and covering me in sulphuric acid!
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