Morris Minor Owners Club

Anyone bought and used one of these ? Digital voltmeter, Only £1.29 ! it seems a bit cheap. Plugs into a cigarette socket. Hoping it wont overheat if left in socket say on a run ??
(Ebay item 251583480341)

Don't ever leave it connected when you are not in the car!

Hi,
I've posted the link and description below for anyone interested, I notice it states 'do not drive'.
Best wishes,
Mike.

http://www.ebay.co.uk/itm/LED-12V-24V-D ... 3a938b4215

Features:
LED Display Cigarette Lighter Electric Voltage Meter For Auto Car Battery
Car battery voltage display
With high brightness of LED there is no difficulty in seeing the display
Powered by car cigarette lighter charger (DC 12~24 V)
Installation: insert the jack of the product into a cigar socket
Voltage available: DC12~24 V
This digital gauge displays the voltage of batteries in the car.
With high brightness of LED(light-emitting diode) there is no difficulity in seeing the display.
Installment:
Clean the cigar socket.
Insert the jack of the product into a cigar socket.
Specifications:
When engine running (do not drive),the LED dispaly:
Between 13.5 TO 14.5 (12V CAR)
Between 26.0 TO 28.0 (24V CAR)
With the engine off, and nothing turned on,the LED dispaly:
Greater than 12.0 (12V CAR) OR 24.0 (24V CAR)(for reference only)
Measuring range : DC 8V-30V±%1.2
Packing content:
1 x Electric Voltage Meter

Thanks gents for feedback, interesting about not driving with it connected ? - The market all of a sudden seems flooded with these very cheap digital guages including some other designs that have permanent type terminals. They are listed within the same ebay catagory.
(However one to just plug in and test battery from time to time sounds useful at this very low price.)
I have 3 original Smiths (Amm: , Oil , Temp: ) personal choice, but one of these modern looking permanent ones won't match at all .

But are these other very cheap permanent intended ones regarded as adequately safe enough at this price for anyone actually wishing to install I wonder ??
They should presumably at least issue instructions to be wired into the ignition switched feed side not the permanent feed we hope ??

I found this one a few weeks back http://www.autoelectricalspares.co.uk/c ... 1859-p.asp. It should match the ones you have already.

The 'do not drive' instruction is simply to protect them from liability should you be 'distracted' by the gauge while driving - and have an accident!