I’m hoping someone can help me. I have several UPSs. Among them is a cheap Newpoint UPS. It’s something like 275W/550VA. I think the battery is dead or near-dead, was recently experimenting with it to confirm, and found some very interesting behavior. I have a 120V lamp with a LED bulb in it. It takes about 8W, 15VA. if I fully charge this UPS, hook the lamp up, turn it on, and yank the plug, the light remains on for about 3 minutes. here’s the kicker – if I fully charge the UPS, hook the lamp up with a “Kill-A-Watt” power meter between lamp and UPS, then pull the plug, it remains on for 24 minutes. there is no discernible difference in brightness. the meter itself is simply measuring usage, yes? surely it doesn’t increase runtime 7x. yet, this behavior is reproducible – at least with this lamp and UPS. further, with a 60W incandescent, it goes out immediately in both configurations. this confirms my suspicion of a bad battery, and explains why it quits in under a minute on my Verizon FiOS ONT, but doesn't add any data to the runtime conundrum. interestingly enough, after it fails with 60W, I can turn it back on and run the LED without plugging it back into the wall. That 60W load is too much. other fun fact: when the UPS is plugged IN, the meter (between UPS and lamp) shows 8W, 14-16VA usage. when the UPS is unplugged, it shows 0W, 0 VA, yet the light is on. can anyone explain this? I'm a biological scientist type with a working understanding of this stuff, and I know I need to replace this battery (already ordered), but what is going on with the meter?