Questions about burgler alarm and rechargeable backup batteries (Poss. B/W)

[JoeM]

I have a Visonic Powermax Plus home security system that I installed and it requires this backup battery to operate:



I have seen similar batteries for the Powermax Plus in the UK labeled as rechargeable but rated 2300mAH as opposed to 2200mAH:


and the cover of my units battery compartment is labeled:


I can't seem to find any rechargeable versions of the needed battery here in the States, only this one:
http://www.homesecuritystore.com/p-17-vi...ttery.aspx which costs $25.00 and they are tacking on $13 shipping. Also they list it as part# 9912H on the site but shipped 9912M. I'm going to contact them about it but their CS is pretty poor and responses are slow.

I'm guessing the one I have is like a cell phone or camera battery that holds it's charge via the system and ultimately looses the ability to hold a charge after some time. (mine lasted one year).

Does anyone know where I could find a rechargeable version and if so, how do you recharge it with that connector?

TIA