0840-0004 EnerSys, 0840-0004 Datasheet - Page 10

• Manufacturer Part Number: 0840-0004
• Description: LEAD ACID BATTERY, 2V, 12AH
• Manufacturer: EnerSys
• Type: Sealed Lead Acid Batteriesr

Specifications of 0840-0004

• Battery Size Code: J
• Battery Capacity: 12Ah
• Battery Voltage: 2V
• Battery Technology: Pure Lead
• External Diameter: 51.8mm
• External Height: 135.6mm
• External Width: 51.8mm
• Weight: 1.85lb
• Battery Terminals: Tab
• Output Voltage: 2 V
• Capacity: 12 Ah
• Chemistry: Lead Acid
• Termination Style: Pressure
• Rechargeable/non-rechargeable: Rechargeable
• Lead Free Status / RoHS Status: na
• Lead Free Status / RoHS Status: na

CHARGING RECOMMENDAT I O N S :
constant voltage (CV) charger or a constant current (CC) charger,
or a modification of either or both of these.
economic constraints imposed by the system. Constant current
charging is widely used in cyclic applications where a recharge must
be accomplished in a relatively short time period. Constant voltage
charging, where a single voltage level is applied across the battery
terminals, is the most suitable method to recharge CYCLON p r o d-
ucts. Depending on the CV charger’s current limit, it is possible to
recharge these batteries from a 100% discharged condition to better
than 95% state of charge in less than one hour, using only the cyclic
charge voltage.
Constant voltage charging
r a n g e s :
charge acceptance in colder temperatures, the charger voltage should
be compensated by approximately 3 millivolts per cell per degree
Centigrade variance from 25°C. This is a negative coefficient, with the
voltage being lowered as the temperature increases, and vice versa.
the initial phase of constant voltage charging. The internal resistance
of EnerSys CYCLON Single Cells and Monoblocs allows for large
inrush current without damage.
Certificate Number EMS 39520, ISO 14001 Certified
Certificate Number FM 32099, ISO 9001 Certified
Publication No. US-CYC-SG-001 February 2003
Broadly speaking, a battery may be recharged using either a
The exact regime chosen generally depends upon the time and
Constant voltage (CV) charging should be within the following
Fast Chargers:
Float Chargers:
To avoid thermal runaway in warmer temperatures, and to improve
There is no need to limit the inrush current to the battery during
Per cell: 2.27 to 2.35 volts @ 25°C
12 volts: 13.62 to 14.10 volts @ 25°C
Per cell: 2.45 to 2.50 volts @ 25°C
12 volts: 14.70 to 15.0 volts @ 25°C
electro-chemical potential, a good rule of thumb to use is that the
charge returned should be 105% to 110% of the capacity delivered
on the previous discharge.
waves. Therefore, consult the EnerSys Application Support Department
for assistance when evaluating the charger current waveforms for your
specific application.
Since not all of the charge returned is accepted to replenish the
Most current waveforms are not pure DC nor are they pure sine
CYCLON SELECTION GUIDE
8