2. 3 Battery Voltage Explanation
Normally It is impossible for the battery voltage to show as 100%.
The max value is 98% even after just being charged.
• 98% Charged = Battery voltage Above 12.59v
• 75% Charged = Battery voltage 12.45v
• 50% Charged = Battery voltage 12.15v
• Discharged condition = Battery voltage less than 12v
3. Operating Instructions
3.1 Before Test
3.1.1 Notice before test
For testing batteries of low-frequency use, it is necessary to cycle (charge and discharge) the
battery several times before testing, normally 3-5 times will achieve a reliable test result. Because
only after the cycling of the battery can the chemical properties of battery be restored, after a
long period of inactivity.
If after 3-5 times of battery charge and discharge, the battery health state is still lower than 60%,
then battery replacement should be considered.
1. Low use batteries should be charged once every 1-2 months to extend the battery life for the
vehicle or boat.
2. Always turn off the engine before testing.
3. When testing an in-vehicle battery, (for the most accurate results) wait 10 minutes after the
engine is turned off before testing, this will allow the battery to normalise.
3.1.2 Connecting the Analyzer Before Testing
Before testing, use a wire brush / alkaline cleaner to clean the battery terminals, remove all
grease, dirt and corrosion. You must achieve 100% electrical connection to the battery terminals
to obtain accurate test results.
Any resistance at the connection to the battery terminals will give a misleading test result.
At the start of the test, ensure that all of the car electronics are turned off the doors are closed,
and the ignition key is turned off.
Attach the red test clip to the battery positive + terminal, the black test clip to Negative - terminal.
NB: The tester has reverse polarity protection, if connected incorrectly, the screen is not bright,
but it will not harm the tester.
In order to ensure a good connection, it is best to wriggle the test clips on the terminal post a few
times.
The tester draws its operating power from the battery being tested; it will only operate when
connected to a battery with more than 6 volts available. For this reason, it will not operate if
connected to a dead flat battery.
