Intel AXXRSBBU4 User Guide - Page 14

Battery Backup Unit Specifications, Battery Life and Data Retention Time

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Battery Backup Unit Specifications Table 5.1 BBU Specifications Battery Technology Battery Operating Environment Battery Storage Temperature Fast Charge Rate Battery Voltage Mechanical Battery Capacity Memory Technology Battery Charge Time Battery Shelf Life Battery Operational Life Supported Cache Memory Memory MTBF (Electrical Components) Smart Battery Monitoring Auxiliary Power NiMH (Nickel Metal Hydride) 4 cell 10-40°C ambient temperature 20% to 80% humidity non-condensing Depends on storage time,:< 30 days: 0-50 °C 30-90 days: 0-40 °C '; > 90 days: 0-30 °C 350mAH using charge circuitry card Nominal OCV: 4.8 V, 1.45 v max per cell typical Conditioning: < 3.6 V Charging maximum: 7.0 V 3.7" x 2.2" 880 mAH DDR2 SDRAM (1.8 V) Typical: ~6 hours to charge from 3.6V OCV to 5.5V OCV Completely depleted: 8 hours 1 year Intel provides a 1 year warranty on the AXXRSBBU4. 128 - 256 Mbytes DDR2 SDRAM 667 MHz (1.8V), max 72-bit bus width 2,471,650 hours at 40° C Temp monitoring via I2C interface. Supports v1.1 "Smart Battery System Manager" Ability to detect the presence of an external auxiliary power source. Circuitry automatically chooses aux power, defers discharge until aux power is removed or exhausted. Auxpower increases the DRT ratings Battery Life and Data Retention Time The Intel utilities display a counter showing the number of times a BBU has been recharged. When you replace a BBU, you should run the utility program and reset this counter to zero for the new BBU. Intel recommends that you replace the battery pack on the BBU once a year or after 500 recharging cycles, whichever comes first. The warranty on the battery pack is for one year. The data retention time is 72 hours (low power) if using the RAM shown below. This rating is approximate and can vary based on battery load, ambient temperature, and number of discharge cycles associated with the battery. • 256 Mb using (5) 32Mx16 DDR2 • 256 Mb using (3) 64Mx16 DDR2 • 128 Mb using (3) 32Mx16 DDR2 • 512Mb using (5) 64Mx16 DDR2 10

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Battery Backup Unit Specifications
Table 5.1 BBU Specifications
Battery Technology
NiMH
(Nickel Metal Hydride) 4 cell
10–40°C
ambient temperature
20% to 80% humidity non-condensing
Battery Operating Environment
Depends on storage time,:< 30 days: 0–50 °C
30–90 days: 0–40 °C ‘;
> 90 days: 0–30 °C
Battery Storage Temperature
Fast Charge Rate
350mAH using charge circuitry card
Nominal OCV: 4.8 V, 1.45 v max per cell typical
Conditioning: < 3.6 V
Charging maximum: 7.0 V
Battery Voltage
Mechanical
3.7” x 2.2”
Battery Capacity
880 mAH
Memory Technology
DDR2 SDRAM (1.8 V)
Typical: ~6 hours to charge from 3.6V OCV to 5.5V OCV
Completely depleted: 8 hours
Battery Charge Time
Battery Shelf Life
1 year
Battery Operational Life
Intel provides a 1 year warranty on the AXXRSBBU4.
Supported Cache Memory
128 - 256 Mbytes
Memory
DDR2 SDRAM 667 MHz (1.8V), max 72-bit bus width
MTBF (Electrical Components)
2,471,650 hours at 40° C
Temp monitoring via I2C interface. Supports v1.1 “Smart Battery
System Manager”
Smart Battery Monitoring
Ability to detect the presence of an external auxiliary power source.
Circuitry automatically chooses aux power, defers discharge until aux
power is removed or exhausted. Auxpower increases the DRT ratings
Auxiliary Power
Battery Life and Data Retention Time
The Intel utilities display a counter showing the number of times a BBU has been recharged. When
you replace a BBU, you should run the utility program and reset this counter to zero for the new
BBU. Intel recommends that you replace the battery pack on the BBU once a year or after 500
recharging cycles, whichever comes first. The warranty on the battery pack is for one year.
The data retention time is 72 hours (low power) if using the RAM shown below. This rating is
approximate and
can vary based on battery load, ambient temperature, and number of discharge
cycles associated with the battery.
•
256 Mb using (5) 32Mx16 DDR2
•
256 Mb using (3) 64Mx16 DDR2
•
128 Mb using (3) 32Mx16 DDR2
•
512Mb using
(5) 64Mx16 DDR2
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