Mid 2015 MacBook Pro Retina Battery Issues, After Apple Replacement?

Adding the screenshot to the question. I just want to note that this time, ironically, and very surprisingly, the battery lasted MUCH longer than it has in months. I also want to add that it died at 2% battery.

I also just noticed there is a difference of roughly 5 watts in the charging, I wonder if my charger is also faulty?

@meeceit - Looks like you just hadn't allowed the system to charge long enough before. So from your testing you're good!

As far as your charger... When you drive you go 70 MPH in the city and when you see a Red light you slam on the brakes screeching to a stop. And when the light lets you go with a Green you put the gas peddle to the floor leaving a puff of smoke from your tires. Clearly, I hope I don't drive like that! ;-}

Your charger is fine! The rate of charge is based on the voltage and temp of the battery. So going back to our driving analog. City driving is slow and the autobahn is as fast as it can and then slow down at the exit.

Do keep in mind you have only 1,000 charge cycles in the battery. So don't let it drop so low that you burn a cycle! Which I know can be difficult if you are on the road, But if you can find that outlet to top off when you can.

@danj I'm not sure I understand...I have always charged my battery to 100% when I charge the computer, and I have also let the battery completely uncharge, and drop to many different levels of charge percentage in the past before putting it back on the charger.

I appreciate the other explanation about the voltage!

@meeceit - You don't want to discharge below the 1/3 point as you'll burn a cycle as the stress of charging a low charged battery is what kills them. When you can top off! It's better for your systems battery. Determine battery cycle count for Mac notebooks

You have one tool (CoconutBattery) to monitor your batteries temp, I prefer this one TG Pro with the full version you can see (track) the batteries temp as you use your system and charging the battery.

The battery will get warm both in its discharge (in use) and when it's charging. The chemical process can cause the battery to off-gas if pushed to hard in either discharge or charge. When allowed to go to far things can go horribly wrong with smoke and flames! If you see the battery blister then you know you've pushed it.

One of the biggest issues is people going cheap! Buying a knockoff charger which in turn damages the charging logic and then your battery!

I won't get deep into the story, one of my clients a few years ago ended up paying over 2 million for the use of a knockoff charger by one of their employees as they set off a fire in a hotel! Such a deal saving a few bucks.

So now you have the full story and the tool/s to watch things. Please don't forget to accept the answer if you're set - Thanks!

Ok, I understand everything you are saying, but this still doesn't tell me why my battery generally only lasts 30 minutes to an hour. What am I missing?