how we save electricity in regenerative braking?

will any one help me which book should i prefer for android

can any one answered me what is the difference B/w Http and https in detail

can any one post MSC ADAMS software template for vehicle dynami analysis..... plz any one help to me.. i needed it very badly for one of my project....

i am unable to understand what is mobility technology would any one help me

is it possible to use water as a fuel for our vehicles?