Keep holding those same 4 keys, until you hear the boot chime 2 more times. Hold those 4 keys - you should hear a boot chime Press and release the power button, then immediately hold Option+Command+p+r NVRAM reset: (you need to have power (magsafe connected, or a working battery) for this reset to work: You do not need a working battery or any power connected to do an SMC reset. SMC reset: Hold Control+Option+Shift, then press and release the power button. If you can't get your MBPro to power on with the battery in - or out, then I would suspect that you not only have a bad battery, you also may have a bad DC-in board (that's where the MagSafe connector is located) The magsafe LED flashing multiple time usually means that the battery is bad (not accepting a charge)ĭo the battery test LEDs on the side of your MBPro light up when you press the test button?ĭo you get a green light on the MagSafe connector when you plug that in? If replacing the magsafe board does not fix, then it's a logic board.Ĭlick to expand.Which MBPro do you have? Probably a FAILED MAGSAFE BOARD, as there's no battery to test when its not installed. Do the battery test lights blink 5 times again? Connect the magsafe connector.Īgain, let it sit plugged in for a minute or two. If all lights flash 5 times after pressing the battery test button, the battery is bad. If the LED appears a normal green (but never goes orange), then the battery is not charging. Let that sit connected (with the LED on green) for 10 minutes or so, then try the power button. The connector LED should light up immediately. Then, unplug the adapter from power, wait about 10 minutes, then plug back in. Make sure the battery is installed, and the battery connection is secure. What color is the LED when you attach the connector? (Fortunately, I can still check the estimated time remaining with iStat Menus.)Īpparently, that’s all wrong, and my laptop really would’ve lasted for that full flight had I just let it discharge past 8%.You did not say anything about the LED on the magsafe connector! A percentage only tells you the current state, not the rate of change - it would take much longer to notice an unexpected power drain from the percentage alone. Having used Apple laptops for over a decade, I’ve always found the time-remaining estimate to also be a good indicator of how much power I’m burning with my current activities so I can “budget” my battery usage when I’m going to need it.Īt the start of a long flight, for instance, I can check the time estimate, and if it only says I have 2 hours left at 90%, I know something’s burning a ton of power and I can go do something about that. I ran it down to 8% before stopping - with about 30 minutes left in the flight - and it remained accurate the whole time. I found it equally helpful when using Xcode normally at the start of a 5-hour flight, as it told me that I had about 4 hours of battery left. After just over an hour, the battery was down to 77%, and it estimated that I had about 4 hours remaining. Just last night, I brought my 100%-charged laptop to the couch to order some nuts and browse the web for a while, and it reported about 5 hours remaining. Well, I’ve always found the time-remaining indicator pretty accurate. Everything we do on the MacBook affects battery life in different ways and not having an accurate indicator is confusing. The reason for removing it is very simple: it wasn’t accurate.Īpple said the percentage is accurate, but because of the dynamic ways we use the computer, the time remaining indicator couldn’t accurately keep up with what users were doing. You can still see the image on the top of the screen, and you can see the percentage, but you will no longer be able to see how much time is remaining before your battery dies. The real problem, according to Apple in a statement to Jim Dalrymple, is the estimated “time remaining” display: You see, the problem wasn’t that Apple’s brand new, flagship, “pro” laptop’s battery only lasts 5 hours for a lot of its customers’ actual usage. This seems common - many other customers and reviewers have noted similarly disappointing battery life in the 5-hour range.Īpple issued a software update today to address this. Apple claims it lasts 10 hours, but I’ve never gotten that - in a fairly light web-productivity workload, I average around 5–7 hours, and if I’m using Xcode, I’m lucky to get 4–5 hours. My 15-inch 2016 MacBook Pro with Touch Bar is pretty good in most ways, but it’s a noticeable regression in battery life from the previous generation. A programmer, writer, podcaster, geek, and coffee enthusiast.Ībout Apple fixes MacBook Pro battery life by removing time estimate
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