User Manual
 25
Acid—Sulfuric acid, used to describe 
the electrolyte or liquid contained in a 
battery’s cells. Pages 
6, 7.
Active Materials—Materials in a 
battery that react chemically to produce 
electrical energy; lead peroxide 
(positive plates) and sponge lead 
(negative plates).
Activation—Adding electrolyte to a dry 
battery. Pages 
8, 14, 23.
AGM—Absorbed glass mat. Page 
6, 8, 9, 
14, 16.
AGM Battery—A battery that does 
not contain any liquid electrolyte. The 
electrolyte is absorbed in glass mat 
material located in each of the battery’s 
cells. AGM and VRLA (Valve Regulated 
Lead Acid) batteries are the same 
design. Page 
8, 16.
Ampere—The amount of electrical that 
a battery produces. Page 
10, 11.
Ampere-Hour—A measure of the 
volume of electricity (one amp per 
hour). Pages 
10, 19.
Ampere-Hour Capacity—The number 
of ampere-hours that can be delivered 
by a battery under specifi c conditions. 
Page 
19.
Antimony—A hard, brittle, silver-white 
metal with a high luster from the arsenic 
family. Pages 
9, 15.
Cadmium—A metallic element 
highly resistant to corrosion used 
as a protective plating on battery 
components.
Capacity Test—A test that discharges 
a battery using a constant current at 
room temperature until voltage drops to 
1.75 per cell.
Charged—A battery cell’s maximum 
ability to deliver current (amps). The 
positive plates contain a maximum 
of lead oxide and a minimum of lead 
sulfate, and the negative plates contain 
a maximum of sponge lead and a 
minimum of sulfate. The electrolyte is 
at maximum specifi c gravity. Pages 
6, 8, 
10, 11, 12.
Charged and Dry—A battery 
assembled with dry, charged plates and 
no electrolyte.
Charged and Wet—A fully charged 
battery containing electrolyte (ready to 
be installed).
Charging—The process of converting 
electrical energy to stored chemical 
energy. Pages 
5, 6, 7, 9, 11.
Charging Rate—The current (amps) in 
amperes at which a battery is charged. 
Page 
9.
Cold Cranking Amps—The number of 
amps a battery can produce at 
0° F for 
30 seconds without cell voltage falling 
below 
7. 2  volts. Pages 5, 8, 10.
Constant Current Charge—A battery 
charger that produces a constant 
current (amps) during the charging 
process. Pages 
12, 13, 15.
Conventional Battery—Same as a 
standard battery or any YuMicron or 
YuMicron CX battery. Page 
7, 9, 13, 14, 
15, 18.
Current—The fl ow of electrical energy 
normally expressed as amperes or 
amps. Pages
 5, 6, 7 , 10, 11, 12.
Deep Discharge—Removal of up 
to 
80% of the rated capacity of a 
battery’s cell.
Discharge—Conversion of a battery’s 
chemical energy into electrical energy. 
Pages 
6, 7, 8, 10, 11.
Discharge Rate—Any specifi ed 
amperage rate at which a battery is 
discharged. 
Dry Charged—Battery cell plates 
that have been subjected to the dry 
charging process.
Electrolyte—In a battery electrolyte 
is a diluted solution of sulfuric acid and 
water. Pages 
6, 7, 8, 11, 12, 14, 15, 17, 
18, 20.
Float Charge—Recharge voltage rate 
that is slightly higher than the open circuit 
voltage of a battery. Pages 
15, 16.
Glass Mat—Fabric made from glass 
fi bers with a polymeric binder such as 
styrene or acrylic which is used to help 
retain positive active material. Glass 
mats also absorb electrolyte in an AGM 
battery. Pages 
8, 9.
Hydrometer—A device used to 
measure specifi c gravity of electrolyte 
in a battery. Pages 
20, 21. 
Lead—Sometimes listed as Pb is a 
chemical element used in lead acid 
batteries. Pages 
5, 6, 7, 8, 15 .
Lead Antimony—A commonly used 
alloy in battery castings or plates. 
Pages 
15.
Lead Calcium—A lead base alloy that is 
sometimes used for battery components 
in place of antimonial lead alloys. Also 
know as lead calcium. Pages 
8, 9, 15.
Lead Oxide—A general term for any 
of the lead oxides used to produce 
battery plates.
Lead Peroxide—A brown lead oxide 
which is the positive material in a fully 
formed positive battery plate. Page 
6.
Lead Sponge—The chief component 
of the active material of a fully-charged 
negative battery cell plate.
Glossary 6










