Terminology

Hello, the G9 date code sticker would indicate that the battery was sold in July of 2019.

Hello, the G9 date code sticker would indicate that the battery was sold in July of 2019.

Hello, the K5 date code sticker would indicate that it was purchase in or around October of 2015.

Hello, the E4 sticker on your battery would indicate a date code of May, 2014.

A unit of measurement for electron flow or current through an electrical circuit. (Amp = Volt / Ohm)

A unit of measurement for electron flow or current through an electrical circuit for a certain period of time. (Ampere X Hour = Ampere-Hour).

In a lead acid battery, it is a dilute solution of sulfuric acid (H2SO4) and water.

A tool used to measure the specific gravity of the electrolyte solution.

A unit of measurement for electrical resistance within an electrical circuit. ( Ohm = Volt / Ampere )

Expresses the relationship between voltage ( volts ), current ( amperes ), and resistance ( ohms ). (Ohms = Volts / Amperes).

The voltage of a battery when there is no load attached ( not receiving or delivering energy). This measurement is best taken when the battery has been at rest for at least 6 hours.

A method of wiring batteries together by connecting the positive terminal of the first battery to the positive terminal of the second and the negative terminal of the first to the negative of the second. The capacity for batteries connected in parallel becomes additive, while the voltage remains the same as the individual battery.

An energy storage device that can deliver energy but cannot be recharged.

An energy storage device that can deliver energy and can be recharged.

A divider made of porous material that is placed in between the positive and negative plates in a battery cell and allows current flow through it while preventing direct contact between the plates which would cause a short circuit.

A method of wiring like batteries together by connecting the positive terminal of one battery to the negative terminal of an other. The voltage for batteries connected in series is additive, while the capacity remains the same as the individual battery.

A method of wiring batteries together in a combination of series and parallel connections.

The density of a solution relative to the density of water.

A condition where the concentration of acid is greater at the bottom of the battery than at the top. This condition is caused by undercharging, and if not corrected can cause premature failure of the battery. This condition can be prevented by periodic equalization.

The lead sulfate on both the positive and negative electrodes in a lead acid battery results during the discharge portion of the charge / discharge cycle and is a normal part of the battery process. If the battery is allowed to remain in a discharged state for a prolonged period of time, these sulfate crystals continue to grow. These larger crystals reduce the effective plate area ands are difficult to dissolve back into solution with normal charging. Thus, they reduce the overall capacity of the battery. This condition can be prevented effectively recharging the battery immediately following a discharge. This condition can also be prevented by periodically equalizing the battery.