Casil12 Volt 7.2 Amp Verizon FiOS PX12072-HG Replacment Battery 12V 7.2AH F2 Lead Acid Alarm Battery

I was pleasantly surprised that this came fully charged at 6.57v out of the box. I'll probably order another one as a hot spare.A couple of notes for the Simon XT:The panel was plugged in when I replaced the battery, and the low battery fault would not clear (status/disarm) after the new battery was installed even though it was charged. Both the panel and voice kept reporting a low battery.To fix this I unpluged the panel from AC and disconnected the new battery, then reconnected the battery first, waited a minute or two, then pluged the panel into AC power. The power sequence has been important over the years during other trouble shooting and it appears this is no exception as the panel then cleared the battery fault and pressing the status button returned the "system ok" message.Keep in mind that if the new battery is below 5.4v out of the box, the panel will correctly report a low battery condition until it has been charged to the minimum acceptable voltage for the fault to clear. You can check the new battery with a multimeter before installation, or once installed, press and hold the number 6 button on the panel for about 10 seconds and the battery voltage will appear on the screen.So, if the battery is charged and the fault hasn't cleared, disconnect and reconnect as above. If the battery is below 5.4v, use the same installation sequence but expect the low battery fault to persist until it has been charged.

Easy to install and great price. Why pay $50 just to have Mercedes name on the battery? Buy this one instead. Recommend.

Works great

Am rewriting my review because a better functioning battery was shipped to me upon my prior comments. The replacement battery is working much better!

Our Cable Box lit up saying it needed a new battery, and inside indicated 12V 7-8A.So this was just the ticket to slide into place as a reasonable replacement.The one I took out was installed 21 years ago... so I'm hoping that this one will be able to hold out and last at least 10 or 15? Discharging and recharging over its usable lifetime, I'm sure it's designed for some basic longevity, but I guess only time will tell where things stand after a decade or two...At any rate, it slid into place as an easy replacement and I put a label on it to say when it was new. Let's see who finds it in what condition hopefully many years down the road. . .Works Well!

The battery in my alarm system was sending error messages to the panel. Was able to find this exact match for the prior battery. It was quick and easy to swap them out and the new battery works just fine. Hopefully I get the same 10 year lifecycle from this one.

Bought it in June of 2024. Didn't use it for most of the winter. It was kept in a heated attached garage. Tried to use it in April of 2025 and it won't hold a charge.

Had the old one out and new one installed in under a minute.