Hi DNZ, Welcome to Inforum!
I agree with Jeff's appraisal above. The monthly searches for 'Wireless Chargers' is very low and although 'Wireless Power' doesn't receive a huge amount more, it has a much broader meaning and, as such, is more likely to receive enduser interest.
'Wireless' is a big market nowadays but with technology advancing at the speed it is and the names/techno terms evolving with it, I wouldn't necessarily recommend holding it for a long period of time waiting for a huge enduser sale (which is contrary to what I would normally suggest with .in/.co.in names). Anything around the mid $xxx sale mark would be a good sale in my opinion.
Good Luck!