Your comment about "pressure" is not consistent with my understanding of the physics and engineering. This allowed me to have a closer look into the state of my board and how I could fix it. To determine what you need for your board, the best idea is head to Louis Rossmann's channel and watch tons of his videos of the same subject. I'll return to post result in the upcoming weeks. It was a really messy board when I got it, with even a wire remaining on a solder pad. Long story short: it seems that, whoever tried to fix this board, removed ISL6259 and couldn't solder it back. I'll test more heavily in the upcoming weeks before ordering a pack of them. I'm afraid that the TPS51125, at this point, is dead. I do have PP3V42_G3H, so this explains the green light on the charger, a sign of relief in this dark area.ģ. I've already ordered some chips (pack of 5) and I'll let you guys know what happened.Ģ. AFAIK, someone removed the chip and tried to solder it again, but failed miserably. Problem is, my board is MISSING ISL6259 (AKA U7000), so this explains why it doesn't work at all. The A1278 schematics shows that the ISL6259 is probably the culprit of unbootable MacBook Pro boards. Turns out I'm really missing some important topics:ġ. Which is also the reason you'll want to make sure you know how to use AirDrop on iPhone and iPad.Months after my initial question, I decided to take a very deep and closer look on the board to see if I was missing something. Still not enough? Then check out how to check your iPad model and generation if you can't remember what age or type your iPad is, or how to turn a Live Photo into a video on iPhone and iPad to more easily share clips with others. Everything's laid out simply for your convenience, however it doesn't include your MaximumCapacityPercent, which lets you compare your battery health to the original battery capacity listed on Apple's specs pages.Īssuming your iPad's battery is up to it, how about trying out some more fun and handy features? Among our repertoire of guides, we can show you how to avoid CAPTCHA popups on iPhone to breeze through online security checks, how to use Google Lens on iPhone and iPad to search Google with your iPad's camera, or how to type the Apple logo on iPhone, iPad and Mac to show your appreciation for the company behind your tablet. Your results will appear in a pop-up at the top of your screen. Installing this Battery Stats shortcut (courtesy of Reddit's r/iPad and users u/nairazak and u/ericswpark) allows you to quickly get your key details with the Analytics file open in the Settings menu. If you're familiar with the Shortcuts app for iOS and iPadOS, then there's an easier way to do all of this. How to quickly check your iPad's battery health with Shortcuts If you're interested in checking how many complete charging cycles your iPad's been through (another indicator of battery wear), search for CycleCount. That's why in step 4, the 7605 mAh current capacity is rated as 100% healthy, even though I've in fact lost just over 5% of the original capacity. The listed battery capacity of this model (an 11-inch iPad Pro 2021) is 7538 mAh, but the original capacity of my iPad's particular battery was actually 8,022 mAh. This is why electronics companies give battery size as a "typical capacity," as they can't guarantee a specific one. The manufacturing process means some cells of otherwise identical specs can carry a greater or lesser charge. The reason this is the case is that no two batteries are alike. This is the calculation that an iPhone makes when you look at the Battery Health setting in iOS, and is more accurate than the MaximumCapacityPercent one because it accounts for the original capacity of your specific iPad's battery. The second is its mAh capacity at the time the data was captured.ĭivide the NominalChargeCapacity figure by the MaximumFCC figure, and the result will be your current maximum battery capacity as a percentage of what it was when new. The first is the mAh (milliamp-hour) capacity of your iPad's battery when it was brand new. In the same block of text, look for two values - MaximumFCC and NominalChargeCapacity - and note them down. Now we need to work out a more accurate estimation.
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