Sure. Right here.
I admit, I didn't shop around, so Amazon may not be the cheapest price but I get next day delivery.
I've got an Anker battery in now. Everything that I've gotten from them is amazing and the battery is no different.
I wonder if these are the same as this.
The link from this post doesn't say it's compatible with either the Sprint N900P or T-Mobile N900T but they do appear to be the same battery. I have the Tmobile version but I wouldn't want to buy them without confirmation.
EDIT: According to Anker's website this is compatible with T-Mobile SM-N900T and Sprint SM-N900P.
Thanks for the tip on Anker! Reviews are saying it lasts at least as long as the original, which is exactly what I want. The aftermarket ones always seem to be worse. I went with this one. Edit: got the anker battery. It's almost 9:30 PM and still at 40% with heavy use most of the day. Yes!!
You should treat yourself to a new battery. There are a lot of counterfeit Samsung batteries. I don't want something that could catch my phone on fire so I just went with an Anker brand from Amazon which is good. If you have any issues with it going bad, they will replace it free.
Yes.Ankar works great! Anker 3200mAh Li-ion Battery for Samsung Galaxy NOTE 3 III, N9000, N9005 LTE, AT&T N900A, Verizon N900V, Sprint N900P, T-Mobile N900T, with NFC Compatibility [18-Month Warranty] https://www.amazon.com/dp/B00FF54C8Q/ref=cm_sw_r_cp_apa_iosHxbGVNRY3Y