I am visiting my parents for the holidays and their alarm battery is not lasting a 2 hour loadshedding stint never mind 4 hours. I thought I would be a good son and install a lithium replacement but it seems like a few shops are sold out. What I did find is a Gizzu DC UPS. So, I decided to install this for the alarm. We have had a couple of 4 hour outages and it works like a charm. 

I saw that the alarm system puts out only 13.6V to the battery and there are some additional connections (remote, transponder). I think the battery cycling to 14.5V would have helped.

Luckily there was a plug available for the UPS to charge from, so replacing the battery was easy. I thought I would share this idea for others not getting lithium stock or having voltage issues.

Thank you.

Jay

Yeah, I know a few people who cannot stop talking about these Gizzu units. It's a great low current battery pack for routers and apparently alarm systems as well.

My only concern would be the charging cycle, while you can skip float charge with lithium the bulk charge up to 14,5V is important. Without that high voltage bulk, there is a chance the battery isn't being fully charge. @frivan, I was wondering if you could advise on this? Is the Gizzu reading as fully charged after a charge cycle, if you are able to check the voltage of the battery that would also be really appreciated?

2 hours ago, Psy said:

Yeah, I know a few people who cannot stop talking about these Gizzu units. It's a great low current battery pack for routers and apparently alarm systems as well.

My only concern would be the charging cycle, while you can skip float charge with lithium the bulk charge up to 14,5V is important. Without that high voltage bulk, there is a chance the battery isn't being fully charge. @frivan, I was wondering if you could advise on this? Is the Gizzu reading as fully charged after a charge cycle, if you are able to check the voltage of the battery that would also be really appreciated?

To answer you, Psy, I have removed the lead acid battery completely. Also, the 230V supply of the Gizzu does its own charging of the internal lithiums. The output of the Gizzu is a flat 12V when the power goes out. If the power comes back, the alarm board supplies 13.6V but nothing has blown up. I suspect there will be diodes protecting the Gizzu channels. I just saw that the output LEDs of the Gizzu lights up when you connect it to the 13.6V.