Banjo-Kazooie Wiki
Bigga Bazza.

The Bigga-Bazza model.

Bigga-Bazza! Battery is an object in the Banjo-Kazooie series. It is the battery the Hag 1 uses, and is a more powerful version of the regular Bazza batteries. The Hag 1 requires two Bigga-Bazzas to function properly. The front shows the "Bigga Bazza!" logo with the slogan "Max Power." The side contains a graphic of a man holding a Bigga-Bazza proclaiming "They're diamond!", and under that, "Made by Rareware."

During the final boss fight in Banjo-Tooie, Banjo and Kazooie must destroy both Bigga-Bazzas powering the Hag 1 by infiltrating the exhaust port with a Clockwork Kazooie Egg in order to blow them up. Apparently, they leave a very severe burning smell when destroyed, as evidenced by Gruntilda's remark once one of the batteries was destroyed.