Dell Precision M4400 battery replacement

Hi,

I have a Dell Precision M4400 and the battery life had dropped to less than 1/2hr. The old battery was a DP/N 0KY266 (Type PT434). I was unable to find a replacement 6 or 9 cell battery on the Dell Australia website so looked to alternate suppliers and found a number of options on an online auction site that claimed to be genuine Dell 9 cell batteries for the M4400.

Can anyone confirm whether the serial and part numbers for the following two batteries (Type 4M529) are legitimate as the printing on the new batteries seems to be a slightly different shade of blue and text spacing to my original battery and it also lacks the Dell embossed logo in the plastic.

KR-0TXWRR-71766-17I-E3PM-A00  and

KR-0TXWRR-71766-17I-E3PL-A00

Thanks,

Ed