I loved having spare batteries for my Galaxy S3 and I had an Anker (same size and capacity of original Samsung one) which would last longer than the stock Samsung battery so I figured that's what I'd buy now that I have a Note 2. I bought the 2-pack with external charger from Amazon (
click here for link) and I'm somewhat disappointed. Both of the Anker batteries stick out about 1-2mm at the bottom (above the speaker) which prevents the back cover from snapping shut completely. This isn't that big of a deal since I use a TPU case, but it's disappointing. I haven't been through enough cycles to test whether the battery life is the same, but considering my phone lasts over 2 days on a charge with the stock battery it'll take a while.
I did, however, order a single QCell battery with external charger from Amazon (
click here for link) and UPS literally dropped it off 10 minutes ago. I immediately tried putting it in the phone and it sits flush, so I already like it more than the Anker. It only has 56% charge so I'll have to measure the battery life after a couple more cycles.
I'd recommend buying a single battery with external charger and making sure you like it before ordering a second spare if you want. I'm highly considering returning the Ankers and buying another QCell after I finish all my testing.
---------- Post added at 01:28 PM ---------- Previous post was at 01:24 PM ----------
I bought this one. Works great.
http://www.amazon.com/Batteries-Rep...qid=1360652070&sr=8-1&keywords=note+2+battery
Edit: I've had Anker batteries for my GS2 when I had it. Had no problems whatsoever.
Do the Anker batteries stick out at the bottom a little bit? Does your back cover snap shut completely at the bottom with either of the Ankers installed?