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HP-16C current consumption
07-14-2017, 08:30 AM
Post: #5
RE: HP-16C current consumption
(07-14-2017 06:49 AM)Ardvan Wrote:  Don't forget about the self discharge of these rechargeable batteries.

The specification sheet says: Charge Retention at 20C: 90%
So your rechargeable batterie looses 10% of its energy per month in addition to the current your calculator will need.

If you use the calculator regularly then this will work. If you leave the calculator off for many months this will not work, because then the calculator will probably be discharged when you need it.

Of course you are right and beginning with Voyager series it does not make sense to use rechargeable batteries within pocket calculators. This time I accidentally had seen those V40H cells and grabbed change to measure current consumption in described way. Just curiosity. Honestly it does not make sense to own 20 or more pocket calculators, too ;-).

Normally I have 2 sets of rechargeable batteries for every device and change them every 3 months doing a discharge/charge cylce. So even non LSD NiMH batteries can be used for many years. For classics series up to 30 series I use LSD cells anyway. Hopefully there may be some 1/3 AAA cells with LSD feature for HP41 rechargeable battery pack.
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HP-16C current consumption - Sadsilence - 07-13-2017, 08:57 AM
RE: HP-16C current consumption - Ardvan - 07-14-2017, 06:49 AM
RE: HP-16C current consumption - Sadsilence - 07-14-2017 08:30 AM

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