does your car need to be on for this to work?
1601502
No. But you'd have to wire the power to a live source when ignition is off.
1601503
It depends on how you connect it to your car. If you connect it directly to the battery then your car does not need to be on. If you plug it into your cars cigarette lighter / auxiliary power port, it will depend on whether your cars power port requires the ignition switch to be in the "accessories" position to proovide power to the power port. The engine itself does not need to be on as the inverter can run directly on battery power. As with any device using power from your car, you will want to prevent it from draining your battery and preventing you from starting your car up when necessary, so I would recommend not using it too long without letting your engine run to recharge the batteries. That being said how long it will run and still , allow you enough power to start your car depends on too many factors, like how high capacity your battery is, how old it is, condition of battery, are other accessories on your car running at the same time etc.... I personally have used it without the car being "on" for 30 minutes.
1601504
Most cars yes they will need to be on. Some cars have accessory ability when turned off.
147075
You need to charge it first. By the way, it is a trickle charger. It will take a while to get up enough charge to start the car. It does not fully charge.
1873906
I thought it said it does in the directions? I can't use the feature because my charger doesn't stay on when car is off.
1288029
No, I think you have to keep it plugged in. I always unplug it when I leave the car. Kind of annoying
1466548
What do u mean? You can select auto or not have it on . If yours doesn't work you would need to contact manufacturer.
692506
No...i leave it plugged in ...the blue led light stays off while my car has been sitting for days...weeks...
1060464
If you have kept the device ON while turning off the car, Device will turn back ON automatically when you start the car. Where as if you have switched device off, you have to press the button and turn it ON after the car start.
1408756
Yes. But if you are asking if it will charge your devices without the motor running, that would depend on whether or not your car's power outlet is wired directly to the battery or to the ignition circuit. The latter would require the key to be in the "on" position.
640895
Plug something in while the car is running. Look for the light on whatever it is that you've plugged in that tells you it is being charged. Turn off the car and remove key. Is the light still on?
925036
My advice is to turn the car on first then turn this on and make sure you turn this off before you turn the car off....
1007405
Yes, it needs to be plugged in to your car's battery directly, or your car's cigarette lighter, while the car is running. It comes with cables for both. it does not store power, as it does not have its own battery.
1723363
No. It has to have power, and then be turned on with the remote or button on the unit.
2131229
I'm not sure what you mean. If you're asking if it will still work without the car being either on or on accessory, every car I've ever been in does maintain power to the cigarette outlet even when the car is completely off. If that doesn't work, just turn your car on accessory and it will work fine. You just turn the switch on the invertor on. I'd recommend turning the interior lights off in your car while doing this or run the cord through the window to prevent running the battery dead. If you do that, you won't have a problem with your battery going dead, not even close.
941778
As long as you can get power to your dash, it will work. I've used it without starting my car.
988055
It has to be plugged in. The typical use case is to be plugged into a USB port in your car.
1466663
Only if your power outlet only works when you have the key in the on or power position. Most cars do have a power outlet that works without the engine on.
1664272
It's wired to be on anytime the interior lights have power. Like other responses, it depends how you wire it.