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ACT 612 6V 12V Battery Tester

Take seconds to receive accurate Ampere hour (Ah) capacity results of the most common 6V and 12V lead acid battery types. The ACT 612 simulates a 20 hour (C20) discharge test in seconds!

Next Day Delivery (subject to availability)

including VAT @ 20%
Regular Price:
  • Discharge Testing
  • Manufacturer Certificate Included
  • Intelligent Battery Tester
  • 6V & 12V Battery Models
  • Simple Operation
  • FreeDelivery
  • 30DayMoneyBack
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ACT 612 6V/12V Battery Tester


The ACT 612 is a dual voltage intelligent battery tester, designed for 6V and 12V lead acid batteries from 1.2Ah to 100Ah, making it capable of testing 12V batteries up to 150Ah. It`s the only product of its kind to have an Ampere-hour (Ah) calibration control, enabling Ah readings to be adjusted to suit various battery technologies including standby SLA (AGM), cyclic GEL and car FLOODED (WET) batteries.




The ACT 612 Comes Suppled With:

  • ACT 612TL Test Leads
  • ACT 430N Soft Carry Case
  • Sample ACT BTL Labels
  • Operating Instructions
  • Certificate of Calibration


Simply turn the Ah Calibration Control to select either standby SLA, cyclic GEL and car FLOODED battery types prior to testing. The Calibration Control also allows you to calibrate the battery tester to non standard battery types.

For 6V & 12V battery models
Test 6V battery models between 1.2Ah and 12Ah, and 12V battery models between 1.2Ah and 100Ah. With a wide Ah range, the ACT 612 is ideal for testing batteries used in many applications from security, mobility to leisure.

Simple Operation
Connect the clamps to the battery, turn the Ah Calibration Control to the desired battery type under test and press the ‘TEST’ button. It’s that easy. Results will be displayed within seconds.

DC Voltage and Ah Capacity Results
There’s no confusing conversion rates or user interpretation needed when using the ACT 612 . Two results are displayed – the battery’s DC voltage followed by the actual Ah capacity available.

When to Recharge or Replace
Battery manufacturers recommend to recharge or replace a battery when its rated Ah capacity falls below 65%. By giving a clear and accurate Ah reading, the ACT 612 will help you identify replacements quickly and easily.

Advanced Pulse Load Technology 
The ACT 612 uses advanced pulse load technology to analyse Ah capacity, based on the battery’s temperature and state of charge. This method is significantly more accurate than measuring voltage and internal resistance and does not deplete the battery unlike a conventional load tester.

Reliable, Continuous Testing
Powered by the battery under test and with ultra low heat generation.

Perfectly suited as a bench tester or out with the engineer.

Identify batteries that still have life remaining and reduce the amount discarded unnecessarily.

Show the customer the result and increase your own battery sales by recommending a new battery for their system.

ACT 612 6V/12V Battery Tester
Operating Voltage 6V and 12V DC
Reverse Polarity Protection Red LED Indication
Max Input Voltage 15VDC
Over Voltage Protection Max 30VDC (10 sec.) with Red LED Indication
Battery Types SLA (AGM), GEL & Flooded (WET)
Battery Sizes 6V (1.2Ah to 10Ah) and 12V (1.2Ah to 100Ah)
AH Capacity Test Simulated 20 hour (C20) load test to 10.50VDC
AH Calibration Calibrated at 0 (zero) position to brand new fully charged premium brand SLA batteries rated at C20 hour at 20°C (68°F)
AH Result Based on the battery under test temperature and state of charge
Adjustment Provides ± Ah adjustment to brand new fully charged standby SLA, cyclic GEL and car FLOODED lead acid batteries
Battery Table Recharge or replace battery when Ah capacity available falls below 65% of the battery's stated capacity
Display Type Blue Back-lit LCD
Flat Battery Warning 6V <5.30VDC, 12V <10.50VDC
Repeat Test Operation Can perform repeat tests continuously
DCV Accuracy ±2% of displayed reading
AH Accuracy ±5% Fully charged premium brand C20 hour rated SLA batteries at 20 - 25°C (68 - 77°F)
Applied Pulsed Load 6A 1.2Ah - 7Ah, 18A 8Ah - 100Ah
AH Calibration_ Adjustment Approx. ±25 dgts
Case Construction High impact ABS with holster
Dimensions 84(H) x 170(W) x 41(D)mm (including holster)
Warranty 12 months
IN THE BOX ACT 612 Intelligent Battery Tester, ACT 612TL Test Leads, ACT 430N Soft Carry Case, Sample ACT BTL Labels, Operating Instructions and Certificate of Calibration

Standard Delivery 3-5 Day Delivery – UK
£2.95 for all all orders under £40.00 (exld vat). Sent by Royal Mail Tracked, delivered/posted within 3-5 working days from the date of your order, subject to availability.

Standard Free Delivery 3-5 Day Delivery – UK Mainland only - Zone A & B
Included in the price for all orders over £40.00 (exld vat). Sent using FedEx, delivered within 3-5 working days from the date of your order, subject to availability.

Express DPD Delivery 1-2 Day Delivery – UK Mainland only - Zone A & B
£4.50 select at the checkout. Sent using DPD on their Award Winning “Predict” Service with these great key benefits:

  • You are given a one hour delivery window. (no more waiting in all day for your parcel)
  • You are notified by text or e-mail on your parcels progress.
  • Change of plan? You can easily use the text or e-mail to rearrange your delivery.
  • Notifications on your parcel up to 15 minutes before delivery.

Orders must be placed before 3pm for next day delivery and a mobile number supplied, subject to availability.

Next Day Delivery – UK Mainland only - Zone A & B
£8.00 select at the checkout. Sent using FedEx, orders must be placed before 3pm for next day delivery, subject to availability.

Saturday Pre 12am - UK Mainland only - Zone A & B
£15.00 select at the checkout. Sent using FedEx, orders must be placed before 3pm for Saturday delivery.

Delivery Surcharges
Because of the high cost of carriage we need to apply a surcharge on all deliveries made in the following regions: 

  • Scotland, Isle of Wight & Isles of Scilly - £6.00  
  • Scottish Highlands and Northern Ireland - £12.00  Zone C
  • Scottish Islands, Isle of Man and Channel Islands - £14.00  Zone D
  • Southern Island - £15.00  Zone E


 International delivery

International delivery charges are automatically added to your order at the checkout; you can also use the guide below for a guide on prices. For any questions regarding international deliveries please contact us at

 Zone 1:

  • France, Germany, Belgium, Netherlands, Luxembourg. £20.00 per parcel

Zone 2:

  • Austria, Denmark. £22.00 per parcel
  • Liechtenstein, Switzerland £47.00 per parcel (added cost for custom clearance surcharge)

Zone 3:

  • Czech Republic, Italy, Slovakia, Spain. £28.00 per parcel

Zone 4:

  • Estonia, Finland, Hungary, Poland, Portugal, Slovenia, Sweden. £50.00 per parcel

Zone 5:

  • Bulgaria, Croatia, Greece (incl islands) Latvia, Lithuania, Romania. £60.00 per parcel

Bosnia-Herzegovina, Iceland, Norway, Serbia. £85.00 per (added cost for custom clearance surcharge)

If no shipping option is available to your selected country.  Please call us on +44 (0) 1603 406 148 to purchase your items.