8500mAh Super Capacity Battery Compatible with iPhone 14, 0 Cycle Li-Polymer Replacement Battery for iPhone 14, with Professional Repair Tool Kit

I feel like I have a brand new phone. The battery I replaced was also a cheap/generic replacement from Amazon, and I suspect it's largely hit or miss with these things, but I can't help but think I've had such a better experience this time because I followed all instructions available, not just the included 'Engrish' printed instructions, but also others online. I watched a few videos & followed the step-by-step on the most prominent home phone repair website. I think I may have been hasty cracking this phone open the first time because I had so much success doing so back in the days of the iPhone 5. i've been told by phone repair professionals that the screens are drastically easier to break now than they used to be. but it may be that the most important instructions to be mindful of, that most of us tend to disregard, is the instructions for "conditioning" a new li-ion battery, and the instructions for getting the most life out of it. They say to immediately charge it to 100% and leave it charging at 100% for 45 minutes, then to fully discharge it (down to 10 or 15%), and repeat this for eight power cycles. After that (and this kinda sucks, but it is what it is) one should avoid ever charging li-ion batteries to 100%. Apparently the best way to drastically extend battery life is to charge back up to approximately 80% (not 100%) and then avoid letting it get below 20%. For the entire life of the battery. if you think about it, you'll notice how quickly it goes from 100% to 80% but then kind of hangs out there. I did some more reading on this and apparently I've been kinda abusive to all my other lithium ion batteries, particularly my 18650 headlamp batteries & my power tool batteries. I don't think the latter is really practical to avoid charging to 100%, but I definitely have not been properly storing my batteries. They should be stored at around 40% charge and then fully charge cycled once every few months.anyway it's kinda interesting all the goofy and weird, counterintuitive problems that failing batteries can cause in everything from smartphones to automobiles. This replacement battery cured a bunch of weird crap my phone was having and has been a big relief.

Battery went bad after few days of use

Much better than recent replacements. I can’t recall how long the original battery lasted but I can say that this batter is performing great right out the box.It lasts around 17 hours with heavy usage and I purposely drained it down and charged it back up to achieve the 3-5 cycles suggested by the manufacturer.It’s not reported as 9000 mah but I think it’s a phone software cap off not the battery. I had the same reporting issue with my previous replacement that was 4500 mah. I’d disregard those numbers.My phone feels normal and last 24hrs easily now without heavy usage. And, around 15-17hrs if I’m on a social media binge ( not saying I do. That was just to do the power cycles). Imma say I won this battle. Very good and improved replacement product.

The battery itself seems to be fine, purchased it for my old SE 2nd gen (2020). Comes with a set of tools that make the install pretty easy. My only issue was with the quality of the adhesive, particularly the one that is installed around the perimeter to seal the screen. It is a bit too thin, and tears very easily, ended up having to fix/patch it in several spots. Once installed though, works fine - the battery easily lasts for a full day of pretty active use with some charge still left at the end of the day.

For starters, it’s not an apple or apple certified product so the phone will forever say it is unable to verify your battery information (see picture for example). That means it will not be able to verify the life or performance of your battery. That being said, it is definitely working better than the battery I had which was the original (iPhone 12 pro). Before removing the battery it said that the battery life was only 70% of what it was when I first had the phone. It was dying very quickly with or without usage of the phone. This battery does not seem to hold a charge better than the batteries that come with the phone but since it’s been so long since the phone was purchased there is no true way for me to tell. I can tell you that it takes a while to charge. Longer than 15 minutes from 20-30 percent up to 100%. Also, when not being used it will last you a day or more but if being used the battery seems to drain fairly quickly. Quicker than the original. However, one thing that is good that I have noticed is that when the battery is low it seems to conserve energy better. Once it’s down to 30-40% it last quite a while regardless if the phone is being actively used or not. Installation was fairly easy other than removing the battery from the sticky backing. I had to bend up the battery to get under it to pry it out which is specifically discouraged. However I had no other way of doing it. Everything else was simple and streamlined. No issues with fit at all. For $15-20 it’s well worth the money and I can’t complain. Much better than buying another phone of the same model which is around $200, let alone a brand new model that will cost significantly more. I’m fine with my purchase. It just doesn’t wow me