Your NBN drops during the next storm and your alarm goes quiet at 2am. You need a back-up battery that's actually on the shelf, not three weeks away. This Jaycar 12V 7.2Ah sealed lead-acid unit slots straight into NBN modems, alarm panels, and UFB installations. It takes a 4.8mm or 6.4mm spade plug, so no adapter hunting. Initial charge sits under 2.16A at 14.4–15V, and it'll push 36A for five seconds when the system needs it. At 2.2kg, it's light enough to mount behind a desk or in a server cupboard without stressing the bracket. Grab one now and stop gambling on your backup staying alive through the next outage