Over a century ago, Thomas Edison developed a rechargeable nickel-iron battery, designed to power cars. Remarkably, the technology is still used by some people to store energy from solar panels and wind turbines—but now, Stanford engineers have tweaked it to charge 1000 times faster.
Duracell vs Energizer was one of the headlining tech fights of the '80s, as Walkmanseseses chewed through cell after cell. Today, a better match up is the one between their rechargeable batteries.
There's a reason why standard batteries contain warnings for you NOT to attempt to recharge them. But, if you're either brave or cheap, here's a guide to extend regular batteries by around three charges with 50 cents of parts from The Shack.