IQV 12V & 20V Universal Lithium-ion Dual Bay Battery Charger for Ingersoll Rand Power Tools. The BC1221 lithium-ion universal charger gets all of the batteries in our IQV® 12 and IQV® 20 Series lineup charged and ready to go whenever you are. Whether it's our 20V or 12V batteries, this innovative, multi-use battery charger will help you get back to work without missing a step. For use with any of our IQV® 12 and IQV® 20 Lithium-Ion Batteries, BL2022, BL2010, BL2012 and BL1203.Compatibility: Charge any of your IQV® 12 and IQV® 20 Series batteries on the same universal charger. Whether its 12V or 20V, the BC1221 is going to make it easier and faster to have a freshly charged battery to get your work done now, not later. Productivity: An LED Fuel Gauge and audible alarm will let you know when your batteries are fully charged and ready to get back to work.