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Home Forums General Discussion Deep cycle battery, boiling?

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    szilagyic
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    Hello:

    I am not sure if this is the correct forum for this… but I have a question on deep cycle batteries. Specifically, I have one attached to a Basement Watchdog backup sump pump, which is a deep cycle battery that needs to be topped off occasionally. The control unit regularly charges the battery, and over the past year I’ve noticed that the battery boils a lot. In fact, I have to frequently add water to it, and on two occasions one of the cells was dry. This last time when I filled it, I noticed the battery became very hot, to the point that steam was coming out of the vents. Is this the sign of a bad battery, or does it sound like the control unit is overcharging the battery?

    I have contacted the manufacturer of the Basement Watchdog and they suggested taking in the battery to be load tested. I tested the acid levels and one of the cells is low, others are fair and one is good.

    Thank you very much!

    Chris

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