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How to test:

Connect the red test clamp to the battery positive (anode) and black to battery 
negative (cathode), the SPTG1 then will power on automatically. After the 
display illuminates press OK key to continue.

Note: Battery voltages below 7.0VDC will not test properly (Charge battery first 

if below 7VDC then retest)

The display menu will allow for the following choices, you can press UP/

DOWN key to choose the desired option: 

     1) battery test
     2) starting system test
     3) charging system test
     4) battery test result
     5) print test result
     6) select language 

Battery Test

• 

Select the battery test and press OK key to continue:

• 

Input testing standard: the standard which you can see on the front 
of the battery, such as CCA, BCI, DIN, CA, etc. CCA or CA are the 
most common.  CA is the standard for Stinger AGM batteries and 
car audio applications.

• 

Input rated capacity: you can see the starting current standards of 

the battery, such as CCA/800A. This is usually listed on the battery 
label.   Note: This determines the threshold for Pass/Fail based on 
battery specifications. Inaccurate setting of this target can cause 
incorrect Pass/Fail results.

• 

Then press OK key to start testing.

Note
If battery is in discharged state (such as a vehicle in storage so battery has not 
been charged in a long time; excessive drain from headlights left on or doors 
left open, resulting in a serious loss of battery power and vehicle and cannot 
be started, etc.), the actual testing process may result with “Please replace 
the battery.” For such batteries, please consult the battery manufacturer’s 
charging requirements and charge the battery then retest.

NOTE: If no increase in RPM is detected, it could be fault of alternator, reg-
ulator or connection to battery failed. SPTG1 will try 3 times to detect RPM, 
if no RPM detected, it will skip the increase RPM detect and the test result 
will display “No Volt Output”. Check the connection between alternator and 
battery, then retest.
 

Charging Test Result:

1. Charging Volt: Normal. The alternator output normal, no problem detected.

2. Charging Volt: Low. Check drive belt of the alternator for wear and/or 

slippage. Check that the connection between alternator and battery is good. 
If both the drive belt and the connection are in good condition, follow the 
manufacturer’s suggestion to eliminate alternator as faulty.

3. Charging Volt: High. Since most alternators use an internal regulator, the 
alternator assembly must be replaced. (Some pre-1990 vehicles use an 
external regulator; if equipped, just replace the regulator.) The normal high 
volt of the voltage regulator is maximum 14.7±0.5V. (Some newer vehicles will 
exceed 15V+). If charging volt is too high, it could possibly overcharge the 
battery. Causing premature failure of battery from overcharging. Systems that 
are designed charge at a high voltage can compensate for this and it is not an 

issue. Check vehicle specifications if output is over expected range and verify 

if this is the desired function.

4. No Volt Output: No voltage output is detected. Check the alternator 
connection cable, the drive belt of alternator and engine to see if they’re in 
good condition and working properly.

5. Diode Test: While testing charging current ripple, the SPTG1 will determine 
whether the diode is functioning properly. When ripple voltage is too high, it is 
possible that at least one diode is damaged. Check and replace the diode if 

possible or repair/replace alternator.

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