Re: NiMH batteries in the HP48 and 49 series Message #5 Posted by Rodger Rosenbaum on 20 Apr 2007, 1:52 a.m., in response to message #4 by James M. Prange (Michigan)
Also from the newsgroup:
Here's what I posted back on March 24, 2006:
" I made some measurements of the current consumption of the HP49G+ with
standard alkalines installed:
Condition of Current
measurement drain
Calc on, doing nothing 18 mA
Calc on, holding ON down 75 mA
Calc running a program 65 mA
Calc on, pressing RED key 30 mA
Calc on, pressing BLUE key 30 mA"
and:
" I have two HP49G+'s. The older one draws 29 uA when off and the newer draws 14 uA when off."
and finally:
" Here are the measurements from my new HP50:
Condition of Current
measurement drain
Calc off 28.4 uA
Calc on, doing nothing 14.6 mA
Calc on, holding ON down 82.5 mA
Calc running a program 73.1 mA
Calc on, pressing ORANGE key 25.8 mA
Calc on, pressing WHITE key 25.8 mA
So, you can expect about the same battery life with the HP50 as with the HP49G+, although the HP50 will wear out 4 rather than 3."
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