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Batteries are items in both installments of the No More Heroes video game series used to recharge the electricity of Travis Touchdown's beam katana without pausing to enter Charge Mode. The Battery Meter at the right of the screen during gameplay displays the beam katana's remaining charge, and once depleted, the beam katana will be unusable until it has been recharged. Batteries can be found in blue cases throughout Extreme Murder Battle Stages in two sizes, small and large. Small batteries, called Battery +, will only partially recharge the beam katana, while large batteries, called Battery Max, will completely recharge their power supply.
Besides picking up a battery, Charge Mode is the only way of replenishing a beam katana's electricity, with the exception of a Tsubaki Mk-III fitted with the third Energy Saving Part, which allows for it to never need recharging.