Appendix A. Raid Battery Card Assembly; Specifications; Battery Life And Data Retention Time - Lenovo ThinkServer RD240 Installation And User Manual

Appendix A. RAID battery card assembly

Specifications

The following table provides specifications of the RAID battery card assembly.

Battery life and data retention time

This sections includes information about the battery life and data retention time.
It is recommended that you replace the battery pack on the battery card assembly
once a year or after 500 recharging cycles, whichever comes first.
The data retention time for the battery card assembly is as follows:
Note: The data retention time varies according to the following:
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Battery technology
Battery operating temperature (ambient)
Humidity (storage and operating)
Battery storage temperature
Battery voltage conditioning
Fast charge rate
Battery pack
Mechanical
Battery capacity
Charge circuitry card
Battery charge time
Cache memory size supported
Memory bus speed
Memory bus width
Error correcting capability (ECC)
Auxiliary power
BBU name
ThinkServer 8708ELP SAS RAID Adapter
Battery (iBBU05)
LiON
v Charge: 10-45°C
v Discharge: 10-60°C
20%-80% (non-condensing)
Depends on storage time, as follows:
v < 30 days: 0–50°C
v 30–90 days: 0–40°C
v > 90 days: 0–30°C
<3.7 V
500 mAh
1 cell
3.595 inches X 2.055 inches
1350 mAh
Yes
4 hours
Refer to the ThinkServer 8708ELP SAS RAID
adapter
Refer to the ThinkServer 8708ELP SAS RAID
adapter
Maximum 72-bit
Not applicable
Yes
Data retention time
v 72 hours for 256 Mbytes, using five
32Mx16 parts DDR2 (double-data-rate
two) (low power)
v 72 hours for 256 Mbytes, using three
64Mx16 parts DDR2 (low power)
105