CarbonOne Safe battery backup – how long does it last?

I had the same question before grabbing one. For me, the important thing is that it keeps detecting during an outage, and mine does. I had a storm knock the power out for a few hours last month and the screen did go dark, but the unit stayed on and I could hear it do its little self-check beep when I walked past. It was still working, just not showing me the numbers.

I mainly wanted it for the kitchen anyway, as a second layer of warning if something happened while we slept. The backup battery gives me that peace of mind without needing to run around checking a separate detector. It’s not a full smart system or anything, but for a simple plug-in device it does what it says. I wouldn’t expect it to run for days, but for a typical outage it’s been fine for me.

I guess it depends on what you mean by useful. For me, the main thing is peace of mind that it’s still watching for a leak while the power’s out. I wouldn’t expect to be staring at the display anyway during an outage, just nice to know the alarm will sound if something happens. Long enough for your typical outage is probably fine.

I would not want one that just beeps for a few minutes and then goes quiet. For me the whole point of a backup is keeping the sensors alive so I know if something is building up while the power is off. The display going dark is fine as long as the detection part keeps working. That is the part that actually matters to me.

The display does shut off to save battery, so you are not getting live readings during an outage. But the sensors are still active, which is the part that matters. I would not count the screen staying on, just the detection and alarm being there if something happens.

The backup is mostly about keeping the sensors alive during an outage, not just the beeping. The screen definitely goes dark to save power, so you won’t see live numbers, but it’s still checking the air in the background. I think that’s the part that matters most if you’re worried about a leak while you’re asleep. It just means you wont get a visual heads up, only the alarm if something actually goes off.

The way I look at it, the backup battery is for the sensors, not for you. Once the power goes out, that screen is going dark to save every bit of juice for the actual detecting part. You’re not going to be standing there watching the numbers tick up or down in the dark. That’s just not what it’s for.

For me, that trade-off is fine. If the power is out and something is leaking, I don’t need to see the reading on a screen. I need the thing to yell at me so I can get out or shut off the gas. The alarm is the part that matters in that situation. I’d rather have it beeping for as long as possible than have a pretty display that kills the battery in an hour.

I will say, it does feel a bit weird not knowing what’s going on if the power is out for a long time. You kinda just have to trust that it’s still working back there in the dark. But honestly, that’s what I bought it for. I wanted something that would keep an eye on things when the house is quiet and dark, not something that would entertain me with readings.

I don’t know the exact hours it’ll last on battery, and I hope I never have to find out the hard way. But the way I see it, a few hours of protection is better than nothing at all if the power goes out while you’re sleeping.

For me the battery is what makes it worth buying. I had a storm knock out power for almost a full day and the unit kept doing its thing the whole time, even though the screen went dark after a bit. That’s really all I need from it.

The battery backup isn’t just for the alarm noise, it keeps the sensors running. I had mine through a couple of outages and the unit kept monitoring the whole time. The screen does cut off pretty much right away, so you won’t be seeing any numbers, but that’s fine with me.

The way I see it, if the power’s out, I’m not sitting there staring at a CO reading anyway. What matters is whether the thing will still scream at me if there’s a problem while the electricity is down. Mine did what it was supposed to do. I think it lasted through a solid six or seven hour outage without any issue and never gave me a low battery warning afterward.

I wouldn’t expect it to run for days on end, but for the usual blackout where you’re just waiting for the power to come back, it does the job.

The backup battery keeps the sensors alive, that part is right. But mine died after maybe 18 months and just started beeping at me until I swapped in a fresh 9V. So dont assume it will ride through every outage forever. The screen cuts off fast on battery, so check the battery status once in a while when the power is on.

If you’re worried about an outage lasting days, I’d just grab a plug-in unit with a 9V battery as a backup for that situation. The CarbonOne is fine for short blips, but I wouldn’t treat it like a survival tool. It’s more about keeping the peace of mind for the first few hours, not a week without power.