Do this product needs battery? How can it be use on unused outlet?
81922
Dan: This tester is for use with DC current (like 12 volt automotive applications) and is NOT for use on household AC current. The tester is rated at a maximum of 28 Volts DC. You do not need a battery.
81923
this is an an automotive, marine dc current tester for 6, 12, 24 volt systems. does not have battery. it is powered by vehicle battery.
81924
It does not use batteries. I CANNOT be used on household current. It is for automotive use ONLY.
81925
the vehicle battery need too be conected ,jou have dan Always current.if jou have no current make use of e ohm divice,but dont use e ohm divice with current it will destroy your instument.this product is only for automotive.
1183065
There is no battery in this. It is designed to plug in to a wall socket. The USB outlet is to charge *Other* devices, like an iPad.
1884548
Yes I use it plugged in. I do not use batteries however, the picture is not the same mirror I purchased. I have a different model.
762176
It has to be plugged in to the access. power outlet. It has no built in rechargeable batteries.
1712860
It does not use any battery. It connects to your source and the power is derived from your source i think.
1391876
No outlet necessary. It runs on replaceable AAA batteries. It automatically shuts off the display after no movement in the pedals, and the LCD display appears when you start and keep pedaling.
1824542
Can anyone confirm that this device has built-in battery? Mine would stop working when unplugged from 110v outlet.
1551261
The does not have a battery. It works with an adaptor that plugs into your regular wall outlet.
1883194
No this does not need a battery. It is plugged into the wall. Also, the only way to turn it off is to unplug it.
602704
I think if I wanted to use it outdoors (provided you have an electrical outlet) I would contact the manufacturer, or I would find the instructions from the manufacturer about outdoor use. I have only used it indoors.
942013
This unit is USB powered, does not need to be plugged to an electric outlet. The computer this device it connected to will power the unit using the USB cable.
1420880
This item doesn't have an internal battery. It has to be plugged in during operation.
1462473
You would use the battery power if there were no electrical outlets such as in the backyard. It comes with a charger so you just plug it in the outlet.
1897484
You can buy a power supply to eliminate the need for batteries. Check the instructions or go to google for more information.
100396
No batteries are needed. It gets what little power it needs from the USB port
1311025
No,this is not battery operated. You need to plug it into a 120 volt/ac outlet. I believe it uses two watts of electricity. It's economical and actually does give off a lot of light. It does not however rotate a lot in its socket.
1427974
To be perfectly honest with you, not sure. But I would assume like any other product, if you leave it on then it is not only still draining power but reducing the life time of the product.