[Galaxy Alpha] Does battery drain faster when download booster is activated?

You can download large files faster using the Download booster (which uses Wi-Fi and mobile networks simultaneously for files greater than 30MB in size 

Compared to not using Download Booster to download large files, there may be slightly higher battery consumption. However as the download time will be less using download booster, compared to not using download boosters. 

Any increase in battery consumption while the file is downloading may be offset due to the shorter download time.