After a few years, the battery life on AirPods declines as the lithium-ion cells inside reach too many charging cycles. If your AirPods frequently need to be charged after only a short time of active use, it's likely the batteries can't sustain required power levels. AirPods batteries are relatively small cells tucked into the bottom of the in-ear wireless headphones.
Remember how long you had to wait for a white iPhone? Well a transparent iPhone is probably many, many years away, if even possible, but one researcher has gotten a step closer by creating a lithium-ion battery that seems invisible.
The transparent battery features overlapped electrodes that make the battery invisible to the naked eye. Developers Yi Cui and Yuan Yang created the battery at Stanford and say they would like to talk to Steve Jobs about creating a transparent iPhone some day.