At some point it dawned on me that lead-acid batteries just won't cut it. From this point on I've been using these battery pack built from scratch using 20 amp-hour lithium-ion cells. Lithium-ion packs give me the power I need while still being lightweight enough to not feel like I have an overweight passenger riding with me at all times. To put it into perspective, each of these packs weighs about ten pounds and has as much stored energy as a car battery. The pack pictured is the very first prototype, using a circuit board fabricated in a PCB CNC machine. It's also the first time I was scared by what I was making. See picture for evidence of vaporized wire due to excess electron movement.
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