Charging The Battery Pack; Storage; Changing The Battery Pack - American Megatrends MegaRAC G2 User Manual
American megatrends megarac g2 battery backup unit: user guide
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Also See for MegaRAC G2:
- Datasheet (2 pages) ,
- Install manual (2 pages) ,
- Features (4 pages)
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Step 2 Install the Optional Battery and Battery Clip,
Charging the Battery Pack
ONLY use AMI battery part number BAT-LIION-3.6-01.
The optional battery pack is shipped uncharged. The MegaRAC G2 card automatically
starts to charge the battery after you install it. You must charge the battery pack before it
can be used to provide backup power to the MegaRAC G2 card. The minimum time that
the battery must be charged is:
AMI Part Number
Description
BAT-LIION-3.6-01
Battery, Li-Ion, 3.6 V, 855/900 mAh on-board
battery pack with mounting brackets
Note:
Li-Ion has no memory effect. Lithium-ion cells offer extended cycle life when cycled at
low depth of discharge.
Storage
If you keep a stock of extra MegaRAC G2 batteries, store them at room temperature.
Note:
The recoverable capacity of cells stored for over one year at room temperature and fully
charged is 94%. The retained capacity of these same cells is 87%. This means the self-
discharge rate for a fully charged cell is approximately 150 mAh per year or 427 uAh per
day. The self-discharge rate for cells is non-linear. A partially charged cell has a self-
discharge rate of about 80 uAh per day.
Changing the Battery Pack
The optional MegaRAC G2 battery pack must be replaced every 400 cycles. Cells retain
80% of their original capacity after 400 cycles. A cycle is defined as a full charge (4.2V)
followed by a full discharge (2.8V). Keep in mind that cycling or storing the cells at
elevated temperatures can reduce the cell capacity and cycle life. Cells discharged and
stored at low temperatures can extend the shelf life of the batteries.
Step
Action
1
Bring down the operating system properly. Turn the computer power off. Remove the computer cover.
Remove the MegaRAC G2 card.
2
Disconnect the battery pack cable from the J1 jumper on the MegaRAC G2 card. Remove the plastic battery
clip and then replace the Battery Backup Unit.
3
Install a new battery pack and connect the new battery pack to the J1 jumper. Align and snap the plastic
battery clip into the three mounting holes over the battery pack.
4
Reinstall the MegaRAC G2 card into the host system.
WARNING!
Risk of explosion if battery type used is incorrect.
Continued
Weight
33 g
Chapter Two : Installing Your MegaRAC G2 Card
Time to Charge
six hours
Cont'd
7
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