The Klein Tools Rechargeable Li-Ion battery replaces the battery in Klein Tools' Rechargeable Self-Leveling Green Planar Laser Level (Cat. No. 93PLL). USB-C charge-in port internally charges the battery pack when securely placed in the laser level or can be charged externally. Replace the lithium-ion battery by removing a single screw at the bottom of the Planar Laser Level. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.