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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)

£199.95 exc. VAT £239.94 inc. VAT £262.80 inc. VAT
  • Discharge Testing
  • Manufacturer Certificate Included
  • Intelligent Battery Tester
  • 6V & 12V Battery Models
  • Simple Operation
  • FreeDelivery
  • 30DayMoneyBack
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  • Description
  • Features & Specification
  • Resources
  • Delivery

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

Orders requiring calibration 

Whilst we take the greatest care to get all orders dispatched and delivered to you in the stated time frame, orders received PM and requiring
calibration may on occasion miss dispatch that day, according to the complexity of the calibration. Be assured they will ship on the next dispatch
this in most cases should not add more than 24 hours to your delivery.

Bank/Public Holidays

Predicted delivery times are based on regular trading days Monday to Friday. Public holidays, bank holidays and weekends are outside the usual scope 
of our dispatch and subject to activities/holidays of our carriers and therefore may incur additional days lead time to your order.

*UK Mainland (Temporarily revised June 2020)

Please note that regrettably, we have had to realign our delivery service options to those available from our carriers.
During the current situation surrounding the effects of the Coronavirus pandemic, logistics from every company are under immense pressure to deliver goods on time.
We have taken the decision to temporarily limit our services rather than let our customers down.
We hope you will understand our position on this and we apologise unreservedly for the inconvenience we know this will cause.
We look forward to restoring our full delivery service schedule just as soon as we are able.

Standard FREE 1-2 Day Courier Delivery – UK Mainland only - Zones A & B

Included in the price for all orders over £75.00 (exc vat). Sent using express courier, delivered within 1-2 working days from the date of your order, subject to availability.


Next Day Anytime Delivery (Excluding Saturday & Sunday) – UK Mainland only - Zones A & B
Sent by express courier, delivered next day (excluding weekends) from the date of your order, subject to availability.


Orders must be placed before 3:00pm for a qualifying next day delivery and a telephone number supplied, subject to availability.

New Postage Map Sept 2018>

Delivery Surcharges

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

  • Zones A & B  - Mainland delivery rates apply. 
  • Zone C - Scottish Highlands (Charges are calculated at the checkout).
  • Zone D - Outer Hebrides, Orkney Isles, Shetland Isles, Isle of Man, Scilly Isles, and Channel Islands (Charges are calculated at the checkout).
  • Zone E - Northern Ireland (Charges are calculated at the checkout).
  • Zone F - Republic of Ireland (Charges are calculated at the checkout).

Offshore Services

All offshore deliveries are a 2 day service as standard. This includes Channel Islands, Northern & Southern Ireland, Scottish Islands, Isle of Man and the Scilly Isles.

International Delivery

International delivery charges are automatically added to your order at the checkout. For any questions regarding international deliveries please contact us at


All export inquiries should be directed to the export division before placement of order.

If no shipping option is available to your selected country please call us FREE on 0800 0224 060 to purchase your items.
All stated prices are subject to VAT at the current rate where applicable E&OA