PulseTech 390PT 6V and 12V Battery Tester (741X390) - Manual (Page 9)

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What is a VRLA battery?
Valve Regulated Lead Acid Battery – This type of battery is sealed and Maintenance Free. It
uses special pressure valves and should never be opened. The valve(s) open when a preset
pressure is realized inside the battery and lets the excess gas pressure out; the valve then
resets itself. Gel and AGM Batteries are VRLA battery types.
What is a SLI battery?
These initials stand for Starting, Lighting and Ignition, which are the three basic functions
which a battery has to perform on all normal vehicles. Batteries given this description will
have been specifically designed for service on cars and trucks within a voltage controlled
electrical system. Those SLI batteries which are intended for heavy haulage vehicles fit-
ted with large diesel motors may often be called COMMERCIAL batteries. They have to be
much more powerful and more robust than batteries intended for cars.
What is STATE OF HEALTH?
It means how much battery capacity is left (%) comparing with the marked original battery
capacity.
What is STATE OF CHARGE?
It a measurement of voltage currently in the battery. Usually stated as a percent of full
charge.
What is CCA (COLD CRANKING AMPS)?
This is the SAE (Society of Automotive Engineers) measurement that should be entered
into the battery tester for test purposes. It is defined as the current in amperes which a
new fully charged battery can deliver for 30 seconds continuously without the terminal
voltage falling below 1.2 volts per cell, after it has been cooled to 0OF and held at that
temperature. This rating reflects the ability of the battery to deliver engine starting cur-
rents under winter conditions.
What is AMPERE-HOUR?
The unit of measurement of electrical capacity. A current of one ampere for one hour im-
plies the delivery or receipt of one ampere-hour of electricity. Current multiplied by time
in hours equals ampere-hours.
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998XM390 02/13