Power your 20V MAX*, 60V MAX* or 120v MAX* tools when taking on jobs involving the regular use of harsh materials like oil, grease, or solvents with the incredibly durable flexvolt 20v/60V MAX* oil-resistant 9ah battery. Ideal for a wide range of applications, this long-lasting battery features a glass-filled, nylon housing designed to resist the effects of chemical corrosion. Engineered with patented technology that automatically switches voltage when you change your tools, this versatile power