ZeroLemon Note 4 Battery Compatible with Galaxy Note 4 3220mAh Slim Battery with NFC for Galaxy Note 4 [N910, N910U LTE, at&T N910A, Verizon N910V, Sprint N910P, T-Mobile N910T]

My Samsung Galaxy Note 4 is better than new now... the case back finally snaps on properly with no bulge or slight gap in battery area! The original oem battery was slightly convex, so did not fit flush in the battery compartment -- therefore kept the case back from fitting perfectly. The Zerolemon battery is flat, and FITS PERFECTLY. (yes, I have OCD issues, lol)Ok, moving on.... Arrived with a 52% charge; Charged up to 100% quickly; Charges fast, about 2-hours from 20% to 100% in regular mode (fast charge OFF); Seems to hold charge nicely, slower drain than I ever remember oem battery having even when new (and that's with all battery draining features turned ON & many apps running). I'm throwing everything at it to test performance. So far so good.Instructions say to charge for 12 hours initially, then 6 cycles of deplete and charge. I'm into the 2nd cycle and pleased so far. The 2nd cycle is draining much slower. That's a really good sign. Also, this battery is operating MUCH COOLER than the oem did, so I guess I won't be using my Note 4 as a hand warmer anymore. Unless something changes and goes horribly wrong, I'd get another Zerolemon again next time I need a replacement phone battery.Just two odd things to note:(1) Instructions say to charge initially in a charger, NOT IN phone. Since I don't have an external charger I charged it up in phone (I also sometimes remove tags from mattresses and pillows, and run with scissors. What a rebel); Seriously, I don't even know anyone with a phone battery charger. Is that a popular thing I missed the memo on or something?(2) Registering product for extended warranty at their website gave some weird message that they'll let me know in a few days if my registration was successful. Ok, uhm... weird. But whatever.UPDATE: Received an email from Zerolemon today letting me know my registration was successful, and I now have a full year warranty. Kewl!Performance update note: It's taking longer each day now for the battery to drain. With my original battery I was afraid to not keep it plugged in charging as much as possible... With Zerolemon battery am only plugging in at night. (Never thought that would be possible with the Note 4). And it continues to run perfectly cool to the touch.Never thought there could be so much difference from one battery brand to another. Wow. (also can't believe I'm raving about a battery! Lol)

This is the second Zero Lemon battery I've bought. First was for my LG Optimus G Pro and it turned it into an even more powerful & productive device. My Samsung battery had to be charged almost 3 times a day at last so I knew I needed a new one and knew exactly where to go. I am extremely pleased with this new one only 2 days in!! It lasts long and circumvents my phone's system to give me full display light right down to 1%, and lives FOREVER between 15% and 1%. Now the battery does add a considerable amount of weight and takes longer to charge fully, but it's worth it because even with power using it was was a joy to pass all the charging stations and people attached to the outlet!!

I don't know how some people got 4 days out of this battery......I've been using this for a solid 2 months and i love it. I bought my phone off amazon back in 2015 and since the middle to end of last year the factory battery has been declining. i even bought a back up "factory" battery from amazon and it quit on me. I had external chargers which worked great until i lost it and after that my phone would need charging MULTIPLE times a day with the factory battery. Now with 10,000mah I charge it once while i'm sleep and i get full use from 1pm-7am CST cause i work 2 jobs including overnight. So 6 hours to charge on a fast charger and it last 19 hours. I play games, watch netflix and hulu, play music, talk for hours with mommy, play more games, download series from netflix, update my apps, talk to friends, look at fb and ig, keep the brightness all the way up all day long and so much more.There is a downside tho: --->>> because the phone itself is calibrated to only 3220mah you will have to turn the phone off and take the battery out for a couple of seconds. At first i would have to do this 3-4 times throughout my day but my phone has updated since then and now i only do it twice a day. Also doing so has cause the plastic case by the stylus to break so be careful. I say this because even if the phone says you are on like 28% the battery could actually be on 45 or 50 something. Or my phone could say 1% but if i take the battery out for a second its still on like 18 or 19% even then you still got a good 3-5 hours before it completely dies.

This battery may be able to last three times as long as a standard battery, but the conditioning and maintenance instructions provided by the manufacturer don't seem to provide that result.I unchecked the "Fast Charge" option, and then I charged the battery to 100%, let it drain to zero, charged it again to 100% and let it drain to zero. I then got about 12 hours of use before having to recharge again. It's possible that my battery was a zerolemon "lemon", but when I googled, I found a post saying that while the zerolemon battery could last as advertised, you have to do something like the following to get that result:1) you have to drain the battery to 0% and then charge for 24 hours with the phone turned off,2) you have to repeat step "1" five times to properly condition the battery.3) after conditioning, you should usually let the battery drain to 0%, and then you should charge for at least 12 hours with the phone turned off.I don't know whether I had a zerolemon "lemon" or the post is correct, but I use my phone a lot and seldom turn it off. I returned the battery.