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 IQV12 and IQV20 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 IQV12 and IQV20 Lithium-Ion Batteries, BL2022, BL2010, BL2012 and BL1203.Compatibility: Charge any of your IQV12 and IQV20 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.