Why does it take literally days for an electronic toothbrush to reach full charge but a device with larger battery can become fully charged in a few hours

Question

Why does it take literally days for an electronic toothbrush to reach full charge but a device with larger battery can become fully charged in a few hours

In: Engineering

Answer 1

I’d guess because 1 ) the toothbrush is inductive charging, which is much slower and 2) those larger devices are significantly more expensive, so one way the toothbrush companies cut costs is to use much slower battery technology.