The 1GB DDR DIMM part # (G90000011000025, MEMORY MODULE.DDR Module.1G.184pin.With Register,PLL DIMM,
With ECC,1 Back.(DDR400),HYNIX HY5DU12822[A~Z]TP-D43 chip.Unigen:UG7128D7588LZ-GJFFP)
The memory cell on 1GB DDR DIMM is HY5DU12822[A~Z]TP-D43 and 18 pcs on one DIMM.
The memory cell self refresh current is 5mA in 2.5V, so 2 cells battery pack 4400mAh/3.7V
doesn't support 72 hours 1GB DDR DIMM memory back up.
1GB DDR DIMM needs 4 cells battery pack for 72 hours memory back up.
The 512M DDR DIMM part # (G90000011000022, MEMORY MODULE.DDR Module.512M.184pin.With ECC,1 Back(DDR400).
HYNIX HY5DU12822[A~Z]TP-D43 chip.Unigen:UG764D7488LN-GJFFP,with packing).
The memory cell on 512MB DDR DIMM is HY5DU12822[A~Z]TP-D43 that is the same as 1GB DDR DIMM
memory cell and 9 cells on one DIMM.
2 cells battery pack 4400mAh/3.7V can support 72 hours 512MB DDR DIMM memory back up.