Best Slim Battery to Date?

[bkundert21]

I think i need a new battery the one i have now won't hold a charge...i use a lot of battery life it appears and i was wondering what extended batteries out there are the best currently? I would love to hear some recommendations from people!
Thanks!

 

[Mustachio]

Check eBay. They now sell 3500 mAh batteries for the Shift, along with a custom-fit back cover, for under $10 shipped. Lots of USA sellers too so the ship time is short.

 

[andrewsean7830]

Apple has just launched a new iPhone 6s/iPhone 6s Plus case called the Smart Battery Case. It looks a bit peculiar - it's a fairly standard silicone case that allows you to easily insert and remove the iPhone.