I appreciate this is an old thread but I had to mention that I would not recommend the Andida 2000mAh, it definitely does not last as long as the original. I need to use the phone daily and often into the evening so for me a second battery and mini charger tray are a no brainer, I always carry both the phone and second battery together. I also like that it means I use the batteries in complete discharge/recharge cycles. I have noticed though that since upgrading to Android 4 whilst the original Samsung battery is lasting about the same as before (around 8 to 10 hours moderate use) the Andida has gotten a lot poorer (around 4 hours moderate use maximum life). I also use Juice Defender app. I'm gonna junk the Andida and probably go for an original Samsung as my new second battery, unless anyone has got a better third party recommendation.
