This could be bad...

Given the option, would you want to think faster and have sharper attention? Research suggests that electrical brain stimulation kits could have just those effects. But now some companies are selling such devices online, leading to calls to regulate the technology.

It may sound too good to be true but scientists say the technology is promising.

Transcranial direct current stimulation (TDCS), which passes small electrical currents directly on to the scalp, stimulates the nerve cells in the brain (neurons).

It's non-invasive, extremely mild and the US military even uses TDCS in an attempt to improve the performance of its drone pilots.
Read more:
BBC News - Warning over electrical brain stimulation