Some times ,especialy in a salt air environment, the metal contacts that typycaly run along the inside of the flashlight tube,become tarnished or corroded.I suggest srips of 120 or so grit sand paper over a popcycle stic of steel wool,twisted on a stick to make a brush.note: use of anti rust oils or other solvants will losen some,But must be then cleaned for good battery connections,all poles should be clean & dry.
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Some times ,especialy in a salt air environment, the metal contacts that typycaly run along the inside of the flashlight tube,become tarnished or corroded.I suggest srips of 120 or so grit sand paper over a popcycle stic of steel wool,twisted on a stick to make a brush.note: use of anti rust oils or other solvants will losen some,But must be then cleaned for good battery connections,all poles should be clean & dry.