LC-X1228P Panasonic - BSG, LC-X1228P Datasheet - Page 18

• Manufacturer Part Number: LC-X1228P
• Description: BATT SEALED LEAD ACID 12V 28AH
• Manufacturer: Panasonic - BSG
• Series: LCr

Specifications of LC-X1228P

• Voltage - Rated: 12V
• Capacity: 28Ah
• Size / Dimension: 6.47" L x 4.92" W x 6.89" H (165mm x 125mm x 175mm)
• Termination Style: Nut/Bolt, M5
• Rechargeability: Yes
• Weight: 25 lbs (11.3kg)
• For Use With: BVW122250003N - BATTERY CHG UNIV 12VDC @ 2.25A271-2390 - BATTERY CHG UNIV 12VDC @ 2.25A271-2386 - BATTERY CHG UNIV 12VDC @ 1.2A271-2385 - BATTERY CHG UNIV 12VDC @ 600MA271-2382 - BATTERY CHG UNIV 12VDC @ 500MA271-2381 - BATTERY CHG UNIV 12VDC @ 500MA271-2380 - BATTERY CHG 120VAC 12VDC @ 500MA271-2378 - BATTERY CHG 120VAC 12VDC @ 300MAPATC-08 - BATT CHARGER 12V 1.5A X 2 UNITPATC-03 - BATTERY CHARGER 12 VOLT 1.5 AMP
• Lead Free Status / RoHS Status: Contains lead / RoHS compliant by exemption
• Other names: LC-X1228; LC-XB1228; LC-XB1228P; LCX1228P; P049

CHARACTERISTICS - CONTINUED
d) Discharge current
Discharge capability of batteries is expressed by the
20 hour rate (rated capacity). Select the battery for
specific equipment so that the discharge current
during use of the equipment falls within the range
between 1/20 of the 20 hour rate value and 3 times
that (1/20 CA to 3 CA): discharging beyond this range
may result in a marked decrease of discharge ca-
pacity or reduction in the number of times of repeat-
able discharge. When discharging the battery beyond
said range, please consult Panasonic in advance.
(Note) With some types of VRLA batteries which
have a built-in thermostat, the thermostat may auto-
matically cut off the circuit when discharge current
exceeds 4 A at the ambient temperature of 104°F
(40°C); therefore, the maximum discharge current
value should be the smaller one of either 4 A or 2 CA.
e) Depth of discharge
Depth of discharge is the state of discharge of
batteries expressed by the ratio of amount of capac-
ity discharged to the rated capacity.
a) Storage condition
Observe the following condition when the battery
needs to be stored.
b) Self discharge and refresh charge
During storage, batteries gradually lose their capacity
due to self discharge, therefore the capacity after
storage is lower than the initial capacity. For the
recovery of capacity, repeat charge/discharge sev-
eral times for the battery in cycle use; for the battery
in trickle use, continue charging the battery as loaded
in the equipment for 48 to 72 hours.
c) Refresh charge (Auxiliary charge)
(1) Ambient temperature: 5°F to 104°F (-15°C to
(2) Relative humidity: 25 to 85%
(3) Storage place free from vibration, dust, direct
Storage
40°C) (preferably below 86°F (30°C))
sunlight, and moisture.
VRLA BATTERIES PAGE 17
c) Refresh charge (Auxiliary charge)
When it is unavoidable to store the battery for 3
months or longer, periodically recharge the battery at
the intervals recommended in the table below de-
pending on ambient temperature. Avoid storing the
battery for more than 12 months.
d) Residual capacity after storage
The result of testing the residual capacity of the
battery which, after fully charged, has been left
standing in the open- circuit state for a specific period
at a specific ambient temperature is shown in the
figure below. The self discharge rate is very much
dependent on the ambient temperature of storage.
The higher the ambient temperature, the less the
residual capacity after storage for a specific period.
The self discharge rate almost doubles by each 10°C
rise of storage temperature.
Residual capacity test result
86 F (30 C) to 104 F (40 C)
68 F (20 C) to 86 F (30 C)
100
80
60
50
40
20
0
0
Below 68 F (20 C)
Storage temperature
3
104˚F
(40˚C)
Storage period (months)
6
86˚F
(30˚C)
9
Interval of auxiliary
charge (refresh
AUGUST 2003
9 months
6 months
3 months
charge)
12
77˚F
(25˚C)
15