The DEWALT 20V MAX Lithium-Ion 4.0Ah Battery is a high-quality power tool accessory designed for use with a variety of equipment such as drills, sanders, and saws. This yellow battery features lithium-ion technology for long-lasting power and rechargeability, with a voltage of 20V and a charge time of 45 minutes. The 4.0Ah battery capacity provides ample power for your tools, while the compact dimensions of 3.5″ x 5″ x 7.375″ make it easy to handle and transport. Compatible with DEWALT products, this lithium-ion battery is a reliable and efficient choice for your power tool needs. Inv #4