Ok, I'm going to be going ahead with replacing my Shield Tablet battery in the next few weeks or so. Not sure exactly when, but when I do, I'll post my results in this thread so shield owners can find it in the future. Below are some links to the batteries that I found on Ebay that MIGHT
be compatible with the Shield Tablet. The original Shield Tablet battery size is suppose to be 3574152 (3.5mm x 74mm x 152mm), according to a comment by Jose Fuentes on this site
. All of the batteries listed below ship from China, I couldn't find any that ship out of the USA, but they should all be able to be shipped to the USA.
Ebay Links (if any of these links stop working because the lists are over, just search Ebay for the text of the links):
3.7V 5500mAh 3380150
3.7V 5135mAh 4563135
3.7V 4850mAh 3773140
3.7V 5000mAh 4068106
3.7V 5000mAh 3380140
3.7V 4800mah 3373158
3.7V 5200mah 3377140
When I get around to trying to replace my Shield Tablet battery, I will most likely be buying two of the batteries listed above (the 3.7V 5200mah 3377140 which I'm really hoping fits, and probably the 3.7V 4850mAh 3773140 because it should be most likely to fit).