Detecting Primary Cells with the DS2711/12

Abstract: The DS2711 and DS2712 Loose Cell NiMH Chargers (designed for one or two AA or AAA NiMH \"loose\" cells) detect an alkaline primary cell and avoid charging it. This application note characterizes a wide variety of used and new cells from a variety of manufacturers and shows how the charger ICs can distinguish between NiMH rechargeable cells and alkaline primary cells.