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

Appendix A. RAID battery card assembly

Specifications

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

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:
BBU name
ThinkServer 8708ELP SAS RAID Adapter Battery (iBBU05)
ThinkServer 8708EM2 SAS RAID Controller Battery
The data retention time varies according to the following:
• Capacity of the battery pack and the battery load
© Copyright Lenovo 2010, 2011
LiON
10 to 45°C (50 to 113°F)
20%-80% (non-condensing)
Depends on storage time, as follows:
• < 30 days: 0 to 50°C (32 to 122°F)
• 30–90 days: 0 to 40°C (32 to 104°F)
• > 90 days: 0 to 30°C (32 to 86°F)
<3.7 V
500 mAh
1 cell
3.595 inches x 2.055 inches (8708ELP SAS RAID Controller
battery)
2.61 inches x 2.122 inches (8708EM2 SAS RAID Controller
Battery)
1350 mAh (8708ELP SAS RAID Controller battery)
700 mAh (8708EM2 SAS RAID Controller Battery)
Yes
4 hours
Yes
Data retention time
• 72 hours for 256 Mbytes, using five 32Mx16 parts
DDR2 (double-data-rate two) (low power)
• 72 hours for 256 Mbytes, using three 64Mx16 parts
DDR2 (low power)
72 hours for 256 Mbytes, using three 64 Mx16 DDR2
parts (low power)
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