UC Berkeley employees have created a battery that can be used as a strap for smart watches - it can be bent, rolled and even pierced with a needle.

The hydrogel electrolyte used in the base is not explosive, and the battery, which looks like jelly, continues to work for almost a month after breaking the tightness of the case.

However, the capacity of the jelly battery is inferior to the classic lithium-ion battery almost ten times, and after 500 recharging cycles, its capacity drops to a sad 60%.

For comparison: modern batteries used in smartphones, on average, drop to only 80%, so we will have to wait before the new technology reaches the general consumer