MagSafe Pinout question

I know that the voltage for the MagSafe is different from the MagSafe 2.

I looked at the output voltage on both AC adapters. The MacBook Pro (MagSafe) is 16.5 to 18.5 volts at 4.6 amps. The MacBook Air (MagSafe 2) AC adapter is 14.85 volts at 3.05 amps. I can see how the 45 watt & 85 watt adapters get their power. 18.5 volts times 4.6 amps equals 85 watts & 14.85 volts times 3.05 amps equals 45 watts. Both the voltage & current are lower on the newer (MagSafe 2) connector. I can spend $10 & get the MagSafe to MagSafe 2 adapter so I can use my MacBook Pro adapter. I wonder if it would be safe to use a higher voltage & current on my MacBook Air. I plan to recycle my MacBook Pro. Speaking of which, do the Apple stores take old non-functioning laptops & recycle them?

OOPS! That thought occurred to me after I sent the post! DUH!!!

So, why did Apple, in its infinite wisdom, drop the MagSafe connector in favor of the USB-C connector? The MagSafe connector is so logical. If one trips over the power cord, the MagSafe connector comes unplugged. If one trips over the power cord, the USB-C connector stays in the laptop & the laptop ends up on the floor. Nowadays, everything is soldered or glued. So, basically one buys a disposable laptop. It doesn't matter if it's a Mac or PC or Chrome-book. The MagSafe connector should be universal.

The voltages at the power adapter output are unregulated, and circuitry inside the Mac regulates and conditions it to exactly what it wants for its battery charging.

Both the laptop & the AC adapter get pretty warm when I'm charging the battery!

You can always use a power adapter with more capacity with impunity. The computer only draws what it needs and is not "overpowered".

I do recall reading about that on the 'net.

I've considered using my laptop as a desktop replacement (I have a Mac mini.) & hook up an external monitor, keyboard & mouse but from what I've read, lithium batteries don't like being constantly charged & apparently I need to have my laptop hooked up to an AC adapter as long as I'm using external monitor, keyboard & mouse.

Alrighty, then.

I'll keep my MacBook Pro charger/adapter. Unfortunately, my MacBook Pro has met an untimely demise. I got it in September 2013 & last week the hard drive died. I'm pretty sure that it's the hard drive because last Thursday it took 5 minutes to get to the desktop & on Friday, it never got to the desktop. Even after 20 minutes, it was still on the boot screen. I don't want to spend hundreds of dollars replacing the hard drive with a solid-state drive. I'd rather spend the money on a new or newer laptop. I traded in my iPad Air 2 on a 2013 Macbook Air. I'll miss my MacBook Pro.

Thanks for answering my questions!

I traded in my iPad Air 2 for a mid-2013 MacBook Air at Experimac. They sell used laptops & minis. I've watched YouTube videos. It's not that hard to replace a hard drive on a mid-2012 MacBook Pro. I don't have the proper tools to do it. Besides, I fear that I'll screw something up. Experimac charges $299 for a 500 GB SSD plus $50 for labor. I don't want to spend $350 on a 5 year old laptop. I'd rather apply that money towards a new or newer laptop. So, I'll recycle my MacBook Pro.

I'll get a MagSafe to MagSafe 2 adapter.

There's a rumor going around that Apple will come out with a mini for professionals this fall. Plus an entry-level MacBook. I hope so!

So, does that mean that my Macbook Air will charge faster with the MacBook Pro charger than with the MacBook Air charger?