Model: AA350
Digital Battery Analyzer
For automotive service professionals, fleet maintenance technicians, and technical owner/operators
Identify critical battery faults and measure battery state of health.
The AA350 is an effective solution for measuring automotive batteries on the bench, and for an owner/operator to use for testing storage batteries in RV and Marine applications. Large Pulse Resistance (LPR) technology provides a highly accurate snapshot of battery state of health. Compensation algorithms automatically adjust for temperature and discharged battery conditions.
Fast to operate, and easy to understand results.
The entire test sequence can be completed in a few seconds. The AA series interface and displays are clear and intuitive, providing users with a wealth of clearly organized results. The graphical display offers at-a-glance understanding of key battery performance characteristics with icons and audible alarms highlighting critical battery problems.
Diagnose and replace batteries before they fail
- Measure battery storage capability
- Calculates Battery Life / State of Health
- Test batteries as low as 20% state of charge
- Automatic state of charge and temperature correction
Compare all models in the AA series
Other battery testing technologies
FAQs
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Which tester is ideal for testing 6V batteries?
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The AA1000 series and AA360 testers are designed to test both 6V and 12V batteries. For testing 6V batteries used in automotive of heavy duty (electric vehicle) applications, the AA1000 or AA1000RP (with printer) is recommended.
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Which Argus tester is appropriate for testing UPS batteries?
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The Argus AA1000RP is the correct tester for most 12V UPS battery applications. Results may be displayed in units of internal resistance (ohms), siemens (MHO), or converted to other rating systems such as CCA, or A. Importantly, the LPR test technology of the AA1000RP allows testing of 12V batteries while they remain on-line. Using the Argus AA1000RP, there is no need to shut down the system and remove the batteries for testing.
Category: AA Series -
What types of batteries can be tested?
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Any lead acid 12V battery with a nominal CCA rating of 200CCA or greater can be tested. This includes wet/flooded, maintenance free, gel, and AGM batteries.
Category: AA Series -
Can the tester be used to measure batteries installed in parallel?
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Argus AA series testers use Large Pulse Resistance to measure internal resistance. The test will measure all resistance between the tester clamps including the resistance of the parallel connection cables.
Set a reference value equal to the sum of the rated values of the parallel batteries, up to a total of 2000CCA.
For the most accurate results it is recommended that the parallel connection cables be removed and each battery be tested individually. The testers also use the CrankCheck test. For the CrankCheck test, the batteries can remain in a parallel configuration.
Category: AA Series -
Can the tester be used to test two 12V batteries in series?
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Yes. To understand the performance of any series pack, each battery should be tested individually. You need not disconnect the batteries from each other or from the vehicle to test. After performing a Battery Life test on the second battery, perform the Cranking Health test. Note: The AA tester may be damaged if connected to 24V.
Category: AA Series -
How do I test 12V batteries connected together in a pack?
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If the batteries are in series, you do not need to disconnect them from each other to test. You can safely and accurately test each battery individually as long as you attach only across a single 12V battery. CAUTION: Connecting the tester to 24V of potential can fatally damage the tester.
If the batteries (12V) are in parallel, you can safely test the pack. For pack testing, select a reference value that is the sum of the rated value of all parallel batteries. In parallel configurations we suggest disconnecting the batteries from each other, and testing each battery separately to increase the accuracy of your measurements.
Category: AA Series -
Does the tester work on GEL batteries?
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Yes. The AA300, 350, 400, 500P testers will test GEL and other types of batteries. Select the WET/MF setting at the start of the test sequence and the tester will convert measured internal resistance to the selected rating standard.
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Does the tester have a battery inside?
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The AA500P, and AA1000/360 series testers each have a small 'coin battery' (CR-2032) inside. This battery preserves the date and time memory that prints on the printed test report. This battery will normally last 2 to 5 years. An icon will be shown on the display when this battery needs to be replaced. The internal battery does not power the test functions. Power to operate the test is provided exclusively by the battery being tested.
Category: AA Series -
What happens if I connect the tester backwards?
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Nothing. The tester will not be damaged and will not operate until it is connected properly.
Category: AA Series -
Does the tester discharge the battery during the LPR test?
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No. While all AA series testers apply a test load of approximately 100A to evaluate battery condition, the load is applied for less than one millisecond, so the total power consumed by the tester is immeasurably small.
Category: AA Series -
Can the tester be used for bench testing batteries?
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Yes. Batteries can be tested on the bench by all AA series testers. The AA350 and AA360 testers are specifically designed for bench testing, and do not include the cranking health and charging system testing features.
All other testers can also be used for bench testing. If the battery is not installed in a vehicle, the cranking health and and charging system tests are automatically bypassed in the test routine.
Category: AA Series -
Will the tester work on discharged batteries?
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Yes, the AA500P series (500P, 400, 350) testers include algorithms that allow the testing of discharged batteries. In most situations there is no need to charge a battery before testing.
However, if the charge level is below 20% of a normally full battery, some test results will be automatically disabled. If the resting battery voltage is below 6V the tester will not operate. In this situation, the battery must be charged before testing.
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Can I test 24V systems with an AA tester?
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Yes. Most 24V systems are composed of two 12V batteries, and for accuracy, the batteries should be tested individually. The batteries do not need to be disconnected from each other to test them one at a time. Test the first battery, then the second, and then perform the cranking health test while the tester is connected to the second battery. Do not connect the tester across 24V because high voltage can damage the tester and printer.
Category: AA Series -
Can I test 6V batteries with an AA500P, AA400, AA350, AA300, AA200 tester?
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The AA500P series tester models are designed for testing only 12V nominal batteries. Testing a 6V battery will not damage your AA tester, but most of the results of the tests will be omitted or not useful. All testers will correctly display voltage, and the AA500P will correctly display the battery internal resistance (mOhm) and the Siemens (MHO) value.
Features
Feature Summary:
- Tests 12V: WET, MF, VRLA (AGM, GEL) batteries
- Tests batteries from 30 - 2000CCA
- Measures battery capability in CCA, A
- Calculates State of Health for SAE, DIN, EN, IEC rated batteries
- Adjusts results automatically for nonstandard battery temperature
- Adjusts results automatically when measuring discharged batteries
- Provides audible and visual alarms for all critical battery conditions
- Completes test cycle in a few seconds
Test Procedure Details
The AA350 applies two unique test routines to every battery. Test results, along with any discovered battery faults are displayed on the LCD screen. Results are logically combined to provide a summary recommendation: Replace Now, Replace Soon, or Continue to Use.
Test 1. Setup and Battery Diagnostics (estimated time: 1 to 10 seconds)
The operator selects the battery type and rating system, and enters the rated size of the battery if that information is available. Basic diagnostics measurements including state of charge and the detection of possible shorted cells are immediately performed.
Test 2. Battery Life Test (estimated time: <1ms)
A Large Pulse Resistance (LPR) test is immediately performed to determine battery capability. LPR brings unmatched speed and accuracy to battery testing. In a fraction of a second, the AA350 subjects the battery to approximately 100A of load, exposing a wide range of internal battery characteristics, and providing critical information used to calculate internal resistance.
If, during Test step 1, the user entered the size of the battery rated under SAE, DIN, EN or IEC, the tester will immediately convert the measured internal resistance values to cold cranking performance, adjust all data for non-standard temperature and non-standard state of charge, and will display the resulting state of health of the battery.
Results of all tests can be reviewed, and all critical battery conditions are indicated by intuitive icons and audible alarms.
Compare to other battery testers
Compare all AA Series testers
Specifications
Description | AA350 Digital battery analyzer for automotive and heavy duty battery testing |
Technology | |
LPR™ tests | Yes |
CrankCheck tests | No |
Alternator tests | Voltage only |
Operating Parameters |
|
System voltage | 6V or 12V |
Input voltage range | 5 - 16VDC |
Power requirements | None |
Operating temp | -10C to 60C |
Battery size testing range | 30-2000 CCA |
Test clamps | Dual contact clamps, dual conductors |
Test time | <1 second |
Safety standards | CE |
Post test review of data | Yes |
Warranty | 2 years |
Display and Interface | |
Buttons | Three |
Display type | LCD w/ backlight |
Display information | Digital, graphical, icons |
Optional printer | No |
Basic Battery and System Diagnostics | |
State of charge (SoC)* | Graph and % |
Bad cell detection | Yes |
Volt meter mode | Yes |
Reverse wiring protection | Yes |
Battery pass/fail indication | Icon, audible |
LPR™ Battery Life Diagnostics | |
CCA test (Large Pulse Resistance) | Yes |
Battery norms supported | SAE, EN, DIN, IEC |
Battery types tested | WET/MF, VRLA/AGM |
Present capacity (CCA, A) | Yes |
Remaining battery life % analysis* | Yes |
Battery life warning indicator/alarm* | No |
Battery internal resistance | No |
State of charge compensation* | Yes |
Temperature compensation | Automatic, continuous |
CrankCheck™ Starting System Diagnostics | |
Starting system analysis | No |
Measurement mode | No |
Low voltage capture | No |
Crank performance warning indicator | No |
Charging System Diagnostics | |
Alternator pass/fail indication | No |
Alternator voltage | Yes |
Diode ripple test | No |
Over/under-charging indication | No |
Physical Specifications | |
Dimensions | 17.1 x 7.9 x 2.5cm |
Weight | 260g |
Housing | ABS plastic (IEC 68-2-32) |
Protective case | Ballistic™ Nylon |



