BR1225 RAYOVAC, BR1225 Datasheet - Page 4

LITHIUM BATTERY, 3V, COIN CELL

BR1225

Manufacturer Part Number
BR1225
Description
LITHIUM BATTERY, 3V, COIN CELL
Manufacturer
RAYOVAC
Datasheet

Specifications of BR1225

Battery Size Code
Coin Cell
Battery Capacity
50mAh
Battery Voltage
3V
Battery Technology
Lithium
Battery Terminals
Pressure Contact
External Diameter
12.5mm
External Height
2.5mm
Lead Free Status / RoHS Status
na

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B. Thermal Wear-Out
At high temperatures, Rayovac’s BR Lithium coin
cells and FB batteries offer significantly lower
failure rates over competing coin cells. Figure 3
shows the relationship between temperature and
the years to 1% failure of 12.5mm diameter cells
of similar capacity. A failure is defined as a closed
circuit voltage less than 2.0 volts on a 250KΩ load
of 0.5 second duration.
C. High Temperature Storage Performance
The advantage of Rayovac BR Lithium coin cell
performance after high temperature storage is
further illustrated in the figure on the right. Figure 4
shows how the BR2325 coin cell compares with
other lithium carbon-monofluoride (BR) and lithium
manganese dioxide (CR) cells when stored at high
temperature. The data presents the results of
weekly closed circuit voltage measurements
on a 1KΩ load at 0.5 second duration after high
temperature storage. The test was started at
a storage temperature of 70°C and then later
increased to 85°C to allow for the temperature
limitations of the CR cell.
VIII. Performance Characteristics
A. System Self-Discharge Comparison
BR Lithium Carbon-monofluoride cells offer
substantially lower self-discharge rates compared
to other battery chemistries. Figure 2 compares the
capacity loss due to self-discharge over a range of
temperatures for various battery chemistries. BR
Lithium coin cells provide self-discharge rates of
less than 0.3% per year and Lifex FB
less than 0.2% per year.
batteries
4
Lithium Coin Cells Temperature/Life Relationship
System Self-Discharge Rate vs. Temperature
4.0
3.0
2.0
1.0
0.0
High Temperature Performance Comparison
90
80
70
60
50
40
30
20
90
80
70
60
50
40
0
0
0
2.0 Volt Cutoff
Manganese
Carbon-Monofluoride
Lithium
Rayovac BR Lithium
Dioxide
Li-MnO
(CR)
20
Percent of Capacity Loss per Year
10
Years of Life to 1% Failure
2
5
40
Time (Weeks)
20
Generic
CR2032
Rayovac BR Lithium
Figure 3
Figure 2
Figure 4
Encapsulated
Alkaline Manganese Dioxide
Rayovac FB
60
Lithium Thionyl Chloride
70°C 85°C
30
Generic Li-CF
10
80
Generic
BR2325
Rayovac
BR2325
40
100
x
(BR)
50
15

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