It looks like they are trying to hold onto the Batteriser Trademark.
In that case they are going to:
a) be tied up for years in court
b) Waste every last cent they have.
c) Lose (because, you know, it's Energiser and their army of crack Trademark attorney's and 60 years of history using the name vs, umm, Mr Parvin, apparently not even a Trademark attorney, and good buddy of the company probably doing it at mates rates)
And if their attorney Mr Parvin is in any way competent he would advise his client not to start shipping product with the name Batteriser on it, because that will just magnify the damages.
Batteroo are screwed.
It's obvious to anyone that Batteroo chose the name Batteriser as a play on the Energizer name. Who didn't at least momentarily associate the two when they first heard it? Energizer will have no problem proving that.
I suspect they are just kicking the can down the road.