Can you turn off the heater, and just use the battery to power USB devices?
286108
the BHB120 offers a convenient belt clip for use without your jacket simply as a power boost or back-up, anytime and anywhere with a Bosch 12V Max Battery.
1750562
The instructions tell you to put an inline 30amp fuse between the battery and the heater. You can use this to break the power flow. You can get it at Walmart or any parts store.
613918
Yes you can but I would avoid this heater. Mine like several others quit working shortly after I bought it.
1985234
Yes, the USB is just to power the device. Each unit has it's own seperate wire with a thermometer so as long as the two temp readings are relatively close it will work as you need. Hope this helps!
179255
No, power goes into the unit, not out of it. The "USB input" on this device is for power only, it is "micro-usb."
856131
Yes. There's a button on the bottom and if the heater isn't sitting flat, pushing this button in, it will turn off.
577168
I only use it with external power, but I believe I recall reading that it can not be powered by USB.
1543536
I don't believe that you can. I always remove my batteries when not in use. It helps you locate it in the dark and uses very little power.
1154130
Yes there is a switch to turn it off,but I also unplug it just to be on the safe side.
1804769
Yes the heater can be turned off or on during the run cycle without unplugging it. Heater is activated by pushing the center button. A light around the button indicates when it is on or off.
1002597
The instructions say no. For safety reasons, the hand warmer function is disabled anytime the external battery is being recharged of charging a device.
279844
Sure you can. But you will not need to keep it plugged in. It should do the job without a recharge.
532501
yep, you just plug it in and its set. it also has a thermostat turning it off when it warms up.
1671639
I honestly have not tried that. I used it for the first time last weekend for 2 items I am selling on ebay so that I can purchase usps postage on paypal. I did not leave it plugged in. when batteries are involved I take out the batteries as well if I will not be using it any time soon, to avoid it messing up the equipment.
797795
I just wired the battery heaters to my block heater and plug it in for however long I'm home. There isn't a maximun or minimal amount of time.
434036
I am not a qualified adviser, but I don't see any reason you could not heat a battery with it IF you do not create any exposed sparks when connecting or disconnecting it near the battery and if you monitor the temperature and shut the heater off before the battery gets excessively warm. I forget whether the heater has it's own thermostat, if it does, the contacts are almost certainly in an enclosed capsule, therefore they should be safe for sparks, but watch the plugging in etc.
210787
That would be a great idea. I never tried that but don't think it would work. the controls (mine has two) have to be set manually each time to the heat setting you want. They shut off after about 10 -12 hours. They will not come on automatically by adding power. 9