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Details about  12v Battery Charge Warning Light, voltage indicator

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12v Battery Charge Warning Light, voltage indicator
Item Ended
Item condition:
07 Feb, 2014 20:18:19 GMT
£1.50 Royal Mail International Standard (Small Packets) | See details
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Item location:
Glasgow, East Dunbartonshire, United Kingdom

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Last updated on  30 Oct, 2013 23:51:59 GMT  View all revisions
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Item specifics

New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging is ... Read moreabout the condition
Manufacturer warranty: 1 year
For full technical information on all of our products please see our website

Our top selling product - completely waterproof
battery monitor

12v Voltmeter using a single three colour LED with multiple output modes
and over-voltage warning:
  • high brightness 10mm three-colour LED (available in 5mm*, 8mm or 10mm LEDs**)
  • complete with mounting holder
  • indicates the charge state of your battery
  • in vehicles, gives a confirmation that your alternator is charging your battery
  • fully insulated and protected with 600mm leads
  • accuracy to better than 0.03v
* note that the 5mm unit has an inline circuit board as it cannot slide into the bezel. There are approximately 60mm flying leads between the LED and the circuit board, then 600mm wires to go to your power supply.
**10mm LED requires 14mm hole for bezel, 8mm LED requires 12mm hole and 5mm LED requires 8mm hole

To order non-standard sizes or settings, please send a note during PayPal checkout, or email using the address given under Contact Details below.

Output table

The voltage thresholds (see table below) can be custom-programmed to your specifications during the build, if you feel the standard thresholds don't suit your application.




Green/Red alternating (over-voltage)


Green (charging)


Amber (75% approx.)


Red slow flash (50% approx.)


Red 2 flashes, repeat


Red 3 flashes, repeat


Red 4 flashes, repeat


Fitting could not be easier - the module has just two wires to connect - red to +12v, and black to negative battery terminal or ground - you should connect the module to a supply that is switched on/off by the ignition key (e.g. the accessory circuit).  The module comes with 600mm red/black flexible, multicore flying leads. 

Instructions are provided and help is always available.   We are always on hand to answer any questions or provide any advice. 


We will dispatch within one working day.  We operate a Fair Postage Policy, and postage is charged at (or below) cost price.  There are no sneaky additions nor is there any charge for packing materials - it couldn't be fairer.  And it's quick.  If you buy more than one item, then you only pay for postage once - good, isn't it?

About SparkBright Products

SparkBright Products is a small business based in Glasgow, UK.  It is operated by bright spark Andrew Ferguson, who has a First Class Honours degree and PhD from the University of Glasgow.  As well as operating SparkBright, Andrew is involved in freelance electronics and software consultancy, as well as teaching part time at the University of Glasgow.

SparkBright has recently upgraded its premises and invested in process and production equipment, enabling us to produce top class products and offer you excellent value for money.  We are very grateful to Scottish Enterprise for all their assistance.

If you have any questions you will find our contact details including email address at the foot of the listing under 'Contact details'.

Business seller information


Returns policy

After receiving the item, cancel the purchase within
Return postage
14 days
Buyer pays return postage
The buyer is responsible for return postage costs.
Return policy details
Returns accepted
Most purchases from business sellers are protected by the Consumer Contract Regulations 2013 which give you the right to cancel the purchase within 14 days after the day you receive the item. Find out more about your rights as a buyer - opens in a new window or tab and exceptions - opens in a new window or tab.

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