Dunkin' is introducing new 'extra charged' coffee with 20% more caffeine that tastes the same as normal

Dunkin
Dunkin' will start selling coffee with 20% more caffeine.
The coffee will be available for only $2 through January.
Dunkin' has grown compared to competitors this years. 
Visit Business Insider's homepage for more stories.
Dunkin' just announced it will sell coffee with extra caffeine to start the new year. Beginning December 30, customers can get Extra Charged hot or iced coffees for only $2 to encourage everyone to try out the new drink. The promotion runs through January 26.The Ex