I had to change the battery on my note, the first note and there is a whole world of batteries out there! I was tempted by the extended battery, 5000mAh, double juice than the Samsung original. I was tempted because when you have a note, you don't just use it as a phone, you do everything with it and you start wishing for the longest lasting battery! Anyway, here is the best extended battery to my knowledge http://m.youtube.com/# But I didn't get the extended because I like my note skinny as it is and the extended makes it fetter and heavier. I got instead an Anker which is a 2700 mAh instead of 2500 like the original Samsung. I just got it and I didn't get the chance to test it under heavy use yet but after 16 hours of light use, it's only half way down....good I think. And if anybody else has suggestions, please just do so!