I bought my X51V in Dec 06 and also got the extended battery. No matter how you slice, dice or julienne it, the extended battery will make it larger. But i further complicated my life by getting an otterbox 1900 case for my Ax! This is one extreme case and did not have the ability for the extended battery. However, being in Afghanistan is awfully hard on electronics and the otterbox is the answer. But I digress. How I solved my power problem was getting the Boxwave power pack (
http://www.boxwave.com/products/batt...ter/index.htm). While this may not be the smallest power brick on the market, it provided me with minimum 5 full recharges for extended use in the field. As I said, this may not be the perfect solution, but it certainly worked for me. Oh yeah, forget about putting the Ax and the otterbox in your shirt pocket; but the protection level is awsome!