Re: Recommended batteries and amp-hour ratings for DMP systems

[Jim <alarminex@xxxxxxx>]

On Wednesday, March 5, 2014 9:41:08 PM UTC-5, blueman wrote:
> I have an XR200 DMP alarm panel and need to replace the backup batteries =
which
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> currently are 2 Genesys (Yuasa) NP7-12 batteries (12v, 7Ah), each fed by
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> a separate 16.5V 40VA transformer and charging circuit.
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> The manual says:
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> "Use sealed lead-acid batteries only: Use the DMP Model 367, 12 VDC 7.0
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> Ah sealed lead-acid rechargeable battery. Batteries supplied by DMP or
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> manufactured by Eagle Picher or Yuasa have been tested to ensure proper
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> charging with DMP products."
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> However,
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> 1. Is there any reason I couldn't use a 12V battery SLA battery with a
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> similar form factor but higher Amp-hour rating, particularly since per
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> DMP each 40VA transformer can support up to 2 batteries? In particular,
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> there are some batteries that are rated at 9Ah that would still fit in
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> the existing enclosure (e.g, PowerSonic PS1290 rated at 9Ah
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> (see: http://www.batterystore.com/Powersonic/PSpdf/PS1290.pdf)
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> 2. More generally, is there any reason that other non-Yusa SLA with
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> equivalent electrical specs could not be used? (despite the manual
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> saying the panel was only tested with Eagle Picher & Yuasa) SLA
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> batteries seem to be pretty comparable and brands like PowerSonic seem
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> to be reputable. In particular, in addition to looking at the PS1290, I
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> am also looking at the PS1270 which is a 12V 7Ah battery that has near
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> identical electrical specs to the Yuasa battery but is a fair bit
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> lighter and smaller.
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> Thanks so much for your kind assistance!

I don't know anything about DMP but any lead acid rechargeable battery will=
 work. HOWEVER .... in the trade, typically Yuasa is considered to be the b=
est.

If the manual says it will charge two batteries then it will. Two 7AH batte=
ries are the same as one 14AH battery (if there is such a thing) The charge=
r has to  provide enough current to charge a dead battery, so using batteri=
es that exceed the recommended AH rating of the manufacturer is not advisab=
le. Flames may result and once you let the blue smoke out of anything elect=
rical it no longer works.