Engineers at Harvard University have developed a lithium-metal battery that can be charged and discharged thousands of times and recharged in a matter of minutes.
They built a postage stamp-sized pouch cell version of the battery, which is 10 to 20 times larger than the coin cell made in most university labs. The battery retained 80 percent of its capacity after 6,000 cycles, outperforming other pouch cell batteries on the market today.