NP4-12 EnerSys, NP4-12 Datasheet - Page 15

• Manufacturer Part Number: NP4-12
• Description: 12V/4AH SEALED LEAD ACID BATT
• Manufacturer: EnerSys
• Series: NPr

Specifications of NP4-12

• Voltage - Rated: 12V
• Capacity: 4.0Ah
• Size / Dimension: 3.54" L x 2.76" W x 4.21" H (90mm x 70mm x 107mm)
• Termination Style: Spade, .187" and .250" (4.7mm and 6.3mm)
• Rechargeability: Yes
• Brand/series: NP Series
• Chemical System: Lead Acid
• Dimensions: 90mmL×70mmW×106mmH
• Primary Type: Rechargeable
• Resistance, Internal: 40 Milliohms
• Size: Rectangular
• Temperature, Operating: -15 to +50 °C
• Temperature, Operating, Maximum: +50 °C (Charge), +60 °C (Discharge)
• Temperature, Operating, Minimum: -15 °C (Charge), -20 °C (Discharge)
• Termination: 0.187/0.25 Quick Disconnect Tab
• Voltage, Nominal: 12 V
• Voltage, Rating: 12 V
• Weight: 1.75 kg
• Lead Free Status / RoHS Status: Contains lead / RoHS compliant by exemption
• Other names: Q4855529

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Glossary of Terms (Continued)
Cutoff Voltage
Cycle
Discharge Rate
End-of-Charge Voltage
Electrolyte
Energy Density
Gas Absorption
High-Rate Discharge
Internal Impedance
Low Voltage Cutoff
Nominal Capacity
Nominal Voltage
Open Circuit Voltage
Overcharge
Parallel Connection
Rated Capacity
Resealable Safety Vent
Secondary Battery
Self Discharge
Separator
Series Connection
Service Life
Shelf Life
Standby Service
Trickle Charge
Voltage Cutoff
Primary Cell
The final voltage of a cell or battery at the end of charge or discharge.
A single charge and discharge of a cell or battery.
Current taken from a cell or battery and expressed as a fraction
of C (Ampere-hour rating of the cell or battery).
The voltage reached by the cell of battery at the end-of-charge,
while the charger is still attached.
Conducts ions in the cell. Lead acid batteries use a sulfuric acid
solution.
Ratio of cell or battery energy to unit weight (pound or kilogram)
or unit volume (cubic inch or cubic meter)
The ability of the negative plate to absorb oxygen gas generated
within the battery; the greater this ability, the greater the charge
current capability.
A very rapid discharge of the battery. Normally in multiples of C
(Ampere-hour rating of the cell or battery).
The resistive value of the battery to an AC current, expressed in
ohms. Normally measured at 1 khz at full charge.
A sensing device designed to end discharge at a predetermined
voltage level.
The nominal value of rated capacity. In sealed lead acid batteries,
nominal capacity is usually measured at the 20 hour rate.
The nominal value of rated voltage. In lead acid batteries, nominal
voltage is 2 volts per cell.
The measured voltage of the cell or battery without a load attached.
The continuous charging of a cell after it achieves 100% of
capacity. Battery life is reduced by prolonged over charging.
Connection of a group of batteries by inter-connecting all
terminals of the same polarity, thereby increasing the capacity of
the battery group. (Note: Differing brands and/or capacities should
not be connected together).
A cell which can be discharged only once. Example: Manganese
zinc and alkaline.
The capacity of the cell expressed in ampere hours. Commonly, a
constant current for a designated number of hours to a specified
depth of discharge at room temperature.
The safety device built into the cell to allow the release of excess
gases and prevent case rupture.
A battery which can be charged and discharged repeatedly.
Example: Lead acid and nickel cadmium batteries.
The loss of capacity of a battery while in stored or unused
condition without external drain.
The materials which separate the electrodes. In a sealed lead acid
battery, they are usually constructed of micro-porous glass fiber
and additionally serve to retain the electrolyte.
Connection of a group of batteries by interconnecting all terminals
of the opposite polarity, thereby increasing the voltage of the
battery group. (Note: The same rule applies as with parallel
connections).
Expected life of a battery expressed in the number of total cycles
or years of standby service to a designated remaining percentage
of original capacity.
The maximum period of time a battery can be stored under
specific conditions, without supplementary charging.
A general term for an application in which the battery is
maintained in a fully charged condition by trickle or float charging
and always ready for use.
Continuous charging by means of a small current designed to
compensate for self discharge in an unloaded battery .
A sensing device used to terminate a charge or discharge when
the battery reaches a predetermined voltage level.
Publication No: US-NP-AM-002 • June 2006
15