Battlefield Methane Tanks

Battlefield Methane Tanks are equipment used primarily by Covenant Grunts.

The Grunt's homeworld, Balaho, is a methane planet and as such they breathe methane. Thus when they are in an oxygen atmosphere like the Halos or Earth they need to wear a methane gas tank. When Grunts are in battle, they may run low on their supply of methane, so they must have a ready supply nearby. So, these tanks contain their vital gas.

They are short and round in shape, purple in color and have a large blue valve on the top. They are seen generally where Grunts are operating. They appear in Halo 2 and Halo 3.

The tanks are also highly explosive due to their methane content.