So i have recently gotten one of my friends into nerf modding. After seeing me mod his brother's apollo and repair one of his damaged longstrikes, he decided to mod a blaster himself in order to participate in backyard wars and such.
To get to the point, he's settled on a stryfe, and wants to put about 40$ into it. He has at least a basic knowledge of electronic projects like this, so he's not a complete noob. He wants to replace the stock motors with rhino's, but he wants to make a custom battery. (sounds totally safe right?) As long as it does not surpass the voltages and etc of a 3s and stays cool, it would work right?
(i'm not asking if this is practical or cheap, considering you can basically custom order lipo's nowadays.)
He's also going to put a voltmeter in, don't worry.
tldr, would my friend be better off using something like a 9v even, rather than using a custom built powersource?