Apart from terminal size, does anybody know the difference between an 8Ah security battery from ELK and a an 8Ah UPS replacement battery with the same physical dimensions? There sure is a big cost difference!
Label and mark-up.upstatemike said:Apart from terminal size, does anybody know the difference between an 8Ah security battery from ELK and a an 8Ah UPS replacement battery with the same physical dimensions? There sure is a big cost difference!
I was thinking of locating the battery outside of the physical unit and wiring it to the UPS / Security Panel . . .With a UPS, the physical dimensions are the first concern
The danger you run in to going too big is overloading the charging circuit.
Yes, that would be easy to do, the difficult thing would be predicting what the UPS is going to do when an external charger is essentially wired in parallel to it's internal charger. You only have one set of leads going from the UPS circuit board to the batter, so unless it's obvious and easy to disconnect it's internal charging circuit, you may have issues. If you were wanting to go just a little over the standard size batter, I'd just risk it and see what happens (UPSs are pretty cheap if you catch the right deal). But if you wanted to connect a huge bank of batteries up to a UPS, I'd probably keep the UPS's standard battery intact, y-connect the leads of the battery to the large external bank THROUGH a 120v powered NO relay, with a separate charger for the bank. That way, as soon as power died, all the batteries would be powering the UPS, but as soon as it returned, the bank would be disconnected from the UPS, and the UPS would only be charging it's own battery, while a separate charger took care of the bank.pete said:it would be easy enough to wire in a charger that can handle the load . . . and/or use a different charger after an extended blackout to bring the battery back to full charge . . .