I'm looking to build a DIY battery power-supply for my Raspberry-Pi3. My electronics engineering skills are intermediate/novice, and as I had began research on the project, I ran across the following excerpt from a web-article about powering the Raspberry-Pi directly via it's GPIO pins:
"A more technical (and of course dangerous) way to power the Pi is directly via the GPIO. It should be noted that, unlike the Micro-USB port, there is no regulation or fuse protection on the GPIO to protect from over-voltage or current spikes. If an incorrect voltage is applied, or a current spike occurs on the line you can permanently damage your Raspberry Pi. At best, you’ll “burn out” some or all of the GPIO pins, at worst you can fry your Pi! So be careful."-modmypi.com
Can battery power source cause power-spikes or over-voltage? Should I be considering regulation?