What length of time can this warmer be left on?
2030065
We have left ours on for over 12 hours cooking some beans... I think as long as there is moisture that it can stay indefinitely.
319564
20-30 minutes. Same amount of time you keep the gel on. The directions suggest not leaving it on for more than thirty minutes.
9701
It might depend on the setting, but I've been able to let it heat up 20-30 mins and use it approximately 30 mins with no problem.
887806
I have not measured it but I am guessing around 45 minutes or so. It gets pretty warm, and is very intense. On low setting it will last longer.
704431
According to the user manual, this feature can be left on up to 12 hrs. I have not done that but have had it on for several hours without any problem. I like this feature for that second or third cup. And it is a hotter temp than can be met by using the microwave.
812883
It warms well, but only for 45 minutes (as per the instruction book). I burnt out my old Coleman cooler by leaving the warmer on too long. Warming is done by the large heat sink protruding into the compartment.
1699211
I've left mine on for over 24 hours but I do check the plug to be sure it's not heating up. Not that often, just every 12 hours or so. Have been using mine a lot, no problems at all.
606718
I don't think there is a way to turn the warmer on after the two hours. I've been removing the carafe and running 2 cups (the minimum for a carafe) into a small pot and discarding this water. This "resets" the clock and I just put my carafe of coffee back on the warmer. Yes, fresh coffee is indeed better, but in certain circumstances its nice to be able to have the warmer on for an extended period of time.
838262
I think you would need to let it run the 30 minutes and turn it back on to have it stay warm for another 30
1629804
It stays on "Keep warm" for 60 minutes, then automatically shuts off. If you want to shut it off after the brewing phase and don't need it to "keep warm" just unplug it.
586983
1-2 hours, depending on the condition of the battery. The heater draws over 7-amps. You really need a much bigger battery. Deeply discharging the battery frequently will significantly shorten the battery's lifespan. We use ours in a motorhome to preheat the bed in the evening, running it for about a 1/2 hour. It draws too much power to leave it on overnight unless we have shore power.
2218999
I would not. I put mine on for four hours using the timer. The next time I used the plug we noticed is was slightly melted...scared me so heater is sitting in my closet unused.
94798
I ordered it for christmas dinner and only used it once. I had it on for a short time, Just keeping things warm while I carved the Roast and ham for the table. So Im not sure if it would stay on for 4-6 hrs. sorry I can't b more help.
564675
I often leave mine on continuously overnight and for several days. Just ensure your heat setting is not too high.
1053837
It is a low even heat. I would say 30 min or so. I still use the microwave method for a single cup. But I love the cup warmer and leave it on mornings or all day on my days off so that cups are always ready to go.
983197
Not really. It will sometimes remain warm for 8 hours or longer, but there is no point in using it once the warmth is gone. I do sometimes take it off and on during that 8+ hour period when it is warm.
945131
It will stay on and keep re heating the water,however,I wouldn't leave it on for hours,but if you were going to want to have a second cup in a half hour or so,you could leave it on as long as it has water in the little tank.