My Dell D420 6 Cell battery is dying

I got this in September of 2006 and it is beginning to lose the ability to hold a charge. It was $85 from Dell in 2006. Now it's $140... so I did a little search online and ordered the best Dell Original battery I can find for the lowest price of $80 + $6 shipping.

I will be leaving for Taiwan tomorrow. So I guess I'll pack the extended battery for this stay.