Batteries having vents

A battery, comprising:

• a housing, including:
• a first terminal and a second terminal;
• the first terminal including a cover having a pressure release, the pressure release actuatable to enable gas to vent from the housing when a threshold pressure is satisfied;
• and
• a filter positioned within the housing and adjacent the cover, the filter structured to enable the gas to vent from the housing and to deter solid material housed within the housing from exiting the housing.

A battery, comprising:

• a housing including:
• a positive terminal;
• and
• a negative terminal, the positive terminal including an outermost cover including both a pip and a line of weakness adjacent the pip, the line of weakness structured to form an opening when a threshold pressure within the housing is satisfied.