My panel battery backup died on me mid-install yesterday

Installing a DSC system at a house over on Maple Street, everything was going smooth until the power flickered and the whole panel just went dark because the backup battery was totally dead. Turns out it was a zw-4567 model that I had sitting on my truck shelf for maybe 8 months. Any of you guys had a battery go bad just from sitting unused like that?

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sarahhart2h ago

Honestly, I've seen lead acid batteries do that a lot if they sit too long without a trickle charge. 8 months is plenty of time for internal discharge to kill a deep cycle battery for good. Heard from another tech that storing them on a float charger is the only way to keep them usable long term.