Which Alarm Batteries Are Best?

These 12 VDC sealed lead-acid batteries are commonly used for backup power in intrusion and enclosure mounted security systems:

While general specification like a certain spade contact connector (F1 or T1 size) and a 4 amp-hour or 5 amp-hour capacity are common, what other criteria is important to consider?

There are hundreds of brands all selling these batteries. How do you pick the best ones?


More than just alarms, many power supply enclosures are sized specifically to fit one or two of these units, so they are important enough to dictate size of cans.

It seems odd that such an important part of the design is bought only based on pricing?

Is that correct?

Yuasa is the best manufacturer that we have found.

Quite a bit more expensive than than the Powersonic's etc. pictured but they will last a lot longer.

That said not many people understand why they have to pay double for a battery when "all it does is ride out power blips".

That said not many people understand why they have to pay double for a battery when "all it does is ride out power blips".

This is my experience too, and may help explain why 'low price' alone often decides what product is used.

I've typically seen cheap batteries get weaker, faster. They may provide full voltage, full AH when new, but even 6 months in they drain much faster.