'Exposing the battery to high temperature and dwelling in a full state-of-charge for an extended time can be more stressful than cycling.' Your battery capacity is probably dropping because if a battery is fully charged and very hot, capacity falls faster, long term. If you plug an 87w 15' MacBook Pro into a lower wattage charger or USB-C PD port, it will take longer to charge. It does make a difference going the other way. Plugging a 60w MacBook Pro into an 87 watt charger makes no difference. You will find that the laptops automatically limit power draw to what they are designed to take. You can experiment by plugging a 15-inch MBP charger (87 watts) into a 13' MacBook Pro (60w) or MacBook (30w). You can experiment with this yourself, because it's a question that's been asked before by people who noticed that Apple makes different wattage chargers. Off the top of my head (I could be slightly off), the MacBook pulls 30 watt, the 13' MacBook Pro 60 watts, and the 15-inch MacBook Pro 87 watts. No, a MacBook Pro takes the wattage it is rated for. What do you think, can a more powerful charger improve power supply of the system and help to get better results? Is this really the only available option right now? And it states it was specially designed for Wacom tablets, so I am not sure it will work for MacBook. I have searched the web to find if there are some 100W chargers on the market (since USBC Power Delivery specification allows up to but the only one I could find was a Wacom charger. So, I am really curious at that moment, will I have better results with 100W charger? I mean, it looks like there is a room for improvement. Thats of course, with AC power supply connected. While the max battery capacity AND current battery capacity actually slight decrease after that high-load period (I use 'About this Mac' info). Still, I recently noticed that after one hour or so of running high-demanding tasks the CPU cores temp is usually about 75 C (I use Mac Fans Control to manually set fans' RPM speed at 95% constant before it gets really hot). All other useful features are just side-effects. We are all aware that this CPU is designed to consume a lot of power and produce excessive heat. So, I am currently using a 15-inch i9 model of MBP.

Macbook pro usb c charger wattage