It's only a "big deal" if you want an accurate meter.
Originally Posted by David Lyga
Mercury oxide cells were used because of their flat discharge curves. Silver oxide cells also have a very good discharge curve, nearly as flat as mercury cells. Alkaline cells do not have a flat curve, their voltage falls constantly over the life of the cell.
Hearing aid zinc-air cells are the best low cost solution, a Schottky diode adapter is the deluxe solution as it allows you to use long life silver oxide cells.
.15v doesn't sound like much, but it is better than 10% of 1.35v and yes it does make an observable difference in readings.
Last edited by E. von Hoegh; 02-19-2013 at 10:47 AM. Click to view previous post history.