Fangrui Product Details 1. Versatile Compatibility: This 100v-240v Portable Li-ion Battery Charger Is Specifically Designed For 18v And 21v Lithium Ion Batteries, Ensuring A And Optimal Charging Performance. 2. Efficient Charging: With Its Advanced Charging Technology, This Charger Provides A Fast And Efficient Charging Experience For Your Batteries. It Quickly Charges Your Batteries To Full Capacity, Allowing You To Get Back To Work In No Time. 3. Compact And Portable: Designed With Convenience In Mind, This Charger Is Mini And Compact, Making It Easy To Carry And Store. Whether Youre Working On-site Or , This Charger Is The Companion For Your Power Tools. 4. Reliable And : Made With High-quality Materials, This Charger Is Built To Last. Its Robust Construction Ensures Durability And , Providing You With A Reliable Charging Solution For Your Batteries. 5. Safe And Secure: Equipped With Multiple Safety Features, Including Overcharging And Short Circuit Protection, This Charger Ensures The Safety Of Both Your Batteries A