I'm reporting back my initial findings in regards to the Ebay combo battery deal.
Ebay combo deal .
2 x 1900mah batteries designed to fit the Reverb and..
1 x Wall / USB battery charger
For $13.29 + free shipping.
New 2X 1900mAh Battery USB Charger for Samsung Galaxy Reverb M950 SPH M950 | eBay
Well, it would seem the old adage is correct. If it seems to good to be true it probably is.
Clearly these batteries are counterfeit junk. They barely last half as a long as the regular battery. There is no way these are 1900mah, not even close.
After being charged all night, in the phone, using the official Samsung charger then unplugging from the charger for 1hr-- WITH NO USE OF THE PHONE WHATSOEVER- the battery drops to 83%!!!!
After 5hrs 40mins (and some light use) 36%!!! Ugg!!
So be warned...
I'm contacting the vendor... and I'll be back with their response.