battery fundamentals Flashcards
The first step in battery service is to
Ensure you have safety glasses or a face shield
Battery negative plates and positive plates with separators between them are called a
Element
What are the three main functions of a battery
Supply’s power to operate the starter
Stabilizes the electrical system by absorbing voltage surges
and supply’s power to accessories when the charging system cant
A maintenance free battery can be
visual inspected and load tested for reuse
Parallel connections within the battery result in
Same voltage with increased current production
The electrolyte in a led acid battery is made up of water and ?
sulfuric acid
Each fully charged battery cell produces approximately ____ volts
2.1 volts
When a battery is discharged
All plates have changed to lead sulfate (PbSO4)
Acid spills can be neutralized by
Baking soda and water
When removing a battery from a vehicle for servicing, always remove the
Negative cable first and install last
Before performing a battery load test, the battery must be charged at least
75%
An open circuit test is performed on a battery to determine
The state of charge of the battery
If a battery load test is performed on a 12v battery at room temperature the final voltage should be
Greater than 9.6
When servicing a battery with tapered terminals, three necessary tools are:
Battery pliers
terminal puller
terminal spreader
A fully charged battery is best stored
In a cool or cold location
If a battery is stored in a discharged condition it
Will freeze easily, will become sulphated and may not recharge
If a battery in a stored vehicle discharges over a period of three days
There might be a parasitic drain in the vehicle
A battery will supply the most power when it is
at room temperature
Prior to changing a battery it is most important that
The plates are submerged in electrolyte
The time required to recharge a battery depends upon
The charger amperage output, the state of charge of the battery and the battery’s rated capacity
When boost charging a vehicle the
ground cable should be connected to the boost vehicles engine block or frame last
The total current carrying capacity of a multiple series battery groups
Remains the same with the addition of every battery
When replacing batteries in groups you should
Plan ahead and replace batteries of the same age, type, capacity and manufacturer
A battery has what _____ volts charge when at 0% and ____ volts when fully charged?
- 6 when at 0%
12. 6 when at 100%
What is the difference between a battery element and cell?
Element is positive plates, negative plates, and separators.
It becomes a cell when the element is submerged in electrolyte solution
