Your UPS beeps at 6am because the battery's on its last legs. You need a 12Ah unit that actually holds a charge through an overnight outage without you babysitting it. This Jaycar 12V 12Ah sealed lead-acid battery draws under 3.60A to charge and pushes 60A for five seconds when the system demands it. The 20-hour rate sits at 600mA, so a standard NBN or alarm setup runs comfortably through a typical grid dip. At 3.65kg it's still manageable for one person to lift into position. Fit it in, set your charger, and forget about it until the next storm