so your saying
so theres no problem with adding a different battery and it fits perfectly? no battery door problems?
So, if the Seidio 1750mAh battery will fit a standard Sprint Hero (not to be confused with the 3500mAh they are developing that comes with a special "deep" backplate) and the standard 1500mAh Sprint Hero battery fits the Droid Eris -- then the Seidio 1750mAh Sprint Hero batter will fit the Droid Eris.
The 1750mAh battery is a 34.6% improvement over the stock 1300mAh battery. The Sprint 1500mAh battery is a 15.3% improvement over the 1300mAh battery.
Seems to me it might be worth getting the Seidio battery if you aren't lucky enough to get a free Sprint battery like ChevyDude.
Or, if we all submit requests to Seidio asking them to begin development on an Eris 1750mAh battery they may do so (I have done so already). They are already working on a Moto Droid battery.
Link, in case you forgot it: seidioonline.com
so theres no problem with adding a different battery and it fits perfectly? no battery door problems?