Re: HP 67 Calculator Battery Terminal plus/minus Message #2 Posted by Etienne Victoria on 30 Apr 2012, 1:22 p.m., in response to message #1 by Steve E.
Sure,
From this very museum:
http://www.hpmuseum.org/batts/battery.htm
And from the battery POV :
From the plug POV:
Quote:
Output 3.6-4.7 V DC @ 150-190MA calculator, and 4.2 V DC @ 50-60 MA battery charger. (Exact specs vary slightly with charger model but chargers are interchangeable.) A complete recharge takes 14 hours with the calculator on or off. The batteries are low when extra decimal points are displayed.
+-----------+
| o - o |
| + o |
+-----------+
Looking at the plug, the center terminal is marked negative. The left terminal is marked + and charges the batteries and the right unmarked terminal (also positive) supplies operating power.
EOQ
Etienne
Edited: 30 Apr 2012, 1:28 p.m.
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