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Details about  GAMMATRONIX 12v LED Battery level / Charge monitor - E

GAMMATRONIX 12v LED Battery level / Charge monitor - E


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100% Positive Feedback
Registered as a business seller

Item information

Item condition:
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More than 10 available / 700 sold
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Item location:
kettering, Northamptonshire, United Kingdom
Posts to:
Worldwide See exclusions
By Wed. 23 Apr. Estimated via eBay FAST & FREE  help icon for estimated delivery date - opens a layer
International postage and import charges paid to Pitney Bowes Inc. Learn More
14 days refund, buyer pays return postage See details
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Seller assumes all responsibility for this listing.
Last updated on  21 Mar, 2014 21:55:02 GMT  View all revisions
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Item specifics

New: A brand-new, unused, unopened and undamaged item. See the seller's listing for full details. See all condition definitions- opens in a new window or tab

Gammatronix Ltd Electronics Store

Visit my eBay Shop  




Integrated LED Battery charge / level indicator

12v Model

 6v models also available!

Good for any 12v battery (Lead-Acid, Gel or Fibre mat) where you want to monitor charging and voltage levels between the ranges specified in the tables below.

Hundreds of voltage monitors sold! CHECK OUR FEEDBACK!


Buyers comments for our range of monitors :


·         Must be good as this is my second one. 1 for the bike & 1 for the microlight.

·         Next day delivery, fantastic service.

·         Good service. Communication Excellent. Good product. Informative Instructions

·         great little gadget

·         Very fast delivery. Very Helpful. Nice & compact - would recommend

·         Good company, honest, fast response. Good to do business with.

·         excellent Item , really well made , good communication recommended

·         Damn fine bit of kit ! Thank you.

·         super fast delivery working perfectly - recommended Thanks

·         Excellent product, comprehensive instructions, fitted and working no problems


Unlike cheap inferior units on ebay that have a large PCB hanging 40+ milimetres  behind the LED, the Gammatronix unit is FULLY INTEGRATED INTO THE MOUNTING BEZEL. This gives you :

  • A Shallow Installation of only 29mm depth behind your panel surface.
  • Rubber wrapped construction for waterproofing and shock resistance
  • Whole unit feeds though and snaps into the FRONT of a 14mm hole.
  • This unit is built to withstand shock and vibration experienced in vehicle installations.
  • DONT RISK other deeper units not fitting the space behind your panel.
  • Safe fused design



Check the specification!...............

  • Protects and warns  against Undercharging, Overcharging, and 'flat' batteries.
  • Integrated tri colour (Red, Green, Yellow)  10mm LED and microprocessor assembly
  • Just 29mm behind control panel.
  • Single 14mm hole required for mounting.
  • 10mm tri-colour LED indication of your battery level or charging state
  • Voltage : 6v or 12v DC   dependent on model.  
  • Unit will operate down to 3.7v.
  • Power Consumption : 10mA nominal
  • Internally PTC fused (self resetting)  - dont risk your system wiring with an unfused unit!
  • Reverse voltage protected. Try connecting it up backwards, you cant break it!
  • Internal 'watchdog' makes sure the unit can never crash and is always reliable
  • RC integrated voltage measurement input
  • Multiple oversampling - unit takes 10+ readings to obtain greatest accuracy.
  • Built in hysteresis to prevent 'strobing LED' when unit is at changeover point.
  • Display LED updates 10 times each and every second.
  • Can be set at installation to operate over one of TWO ranges
  • Supplied with fitted connection leads
  • Supplied with comprehensive instructions


The Details...............

Its annoying when your battery goes flat without warning. Some vehicles, such as older motorcycles, dont even warn you if your alternator has failed. You run on battery until the lights get dim, engine misfires and everything stops. With this neat little device, you get a nice clear warning that something is wrong. On the other hand, you might just want to know how much juice is left in a battery powering a system that has no charging facility.

This versatile unit can be used wherever you have a 12v or 6v (according to model) lead-acid battery or charging system. Perhaps your bike, car, caravan, camper or boat, or that battery you have to power the lights in your shed can go flat on you without warning, or you would like some idea of how much juice you have left?

Our battery / charge monitor device is FLEXIBLE so you can use it to tell you if your battery is charging (working alternator!), or, if you want a simple way of finding out how much is left in your battery, the tri-colour LED will illuminate in different colours, and even flash to tell you the 'current' situation. Simply set the link on the rear of the unit to set operating mode at installation time.

The large 10mm green/red/yellow/flashing LED is built into a black mounting bezel, with just two wires you connect into your electrical system. One to battery positive, one to negative. We couldnt have made it simpler.

The tables below show the operating range of the unit, depending on the mode set :


The 10mm LED indicator will signal at the following levels :

Battery Charging Indicator Mode (No Link Fitted)


Red / Green  Flsh



Yell Flash


Red Flsh

6v DC

> 7.6v






12v DC

>  15.2v














Battery Level Indicator Mode (Link Fitted)




Yell Flash

Yell Fast Flsh


Red Flsh

Red Fast Flsh

6v DC








12v DC


















 We would love to see pictures of your installation for possible inclusion on our listings to show the great ways this product can be used. Please take the time to send them to us at  the email address in the contact details at the bottom of the page.

On 18-Jan-12 at 12:02:17 GMT, seller added the following information:

Business seller information

Gammatronix Limited

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
Gammatronix Ltd. Warranties & Returns Policy For UK customers, under the distance selling regulations, you have 14 days to return the item if you change your mind. We will provide a full refund of your purchase costs inc any shipping if charged after it is returned to us in original undamaged condition. For rest of the world, we will only refund your purchase cost of the item. (not shipping). In all cases please use the Ebay “Return an item” feature so that we can track your return and obey Ebay policies. All goods are covered by a 12 month manufactures warranty (unless otherwise stated). In the unlikely event of your goods being delivered faulty, or damaged, you must contact us within 14 days of the date of delivery via Ebay Messenger “Ask a question” in order for us to arrange a replacement or provide a refund. Please note that although your warranty covers both parts and labour it does not cover delivery and collection costs of the goods to and from us. Any charge must be paid by you, the customer. If products are returned damaged or modified we reserve the right to make an appropriate partial refund. Any items under warranty will be repaired or replaced with an item of similar condition. All refunds and liabilities are limited to the cost of the item only, and you should obey all installation and operational instructions supplied with the product.
Most Buy It Now purchases are protected by the Distance Selling Regulations, which allow you to cancel the purchase within seven working 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.

Questions and answers about this item

No questions or answers have been posted about this item.

Seller assumes all responsibility for this listing.

Postage and packaging

Item location: kettering, Northamptonshire, United Kingdom
Postage to: Worldwide
Excludes: Armenia, Azerbaijan Republic, Georgia, Kazakhstan, Kyrgyzstan, Russian Federation, Tajikistan, Turkmenistan, Uzbekistan, Belarus, Moldova, Ukraine

Payment details

Payment method Preferred/Accepted  
Credit or debit card through PayPal

Immediate payment required for this item.

Immediate payment of £12.98 is required.

Seller's payment instructions

OUTSIDE UK - We ship airmail untracked to keep your costs low. Shipments take 5-7 working days to arrive for the vast majority of customers. Approx 5% may suffer customs and postal delays at destination country and may take up to 3-4 weeks. Please be patient, as your postal service is outside of our control. UK CUSTOMERS - Royal mail usually delivers within 24 hrs of posting. WE DO NOT RECOMMEND premium shipping. Expensive and unlikely to get to you much faster. SHIPPING DEADLINE NOON UK TIME
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