Hgizeri,
My understanding of the Trademark dispute is:
If the Batteriser trademark application was abandoned there would be no ruling in the case.
If there is a ruling in favour of Energizer, this is better for Energizer in future disputes, because they can argue that Batteriser was denied. This may help Energizer in similar disputes.
So this is why Energizer did not want to allow Batteroo to abandon their application.
Regards,
Jay_Diddy_B