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-   -   Memory effect on NiMH batteries (https://forums.steves-digicams.com/general-discussion-11/memory-effect-nimh-batteries-8930/)

Mathew Apr 23, 2003 4:04 AM

Memory effect on NiMH batteries
 
I would like to know whether the memory effect is applicable to NiMH batteries. I have read that NiCD batteries have this problem and was under the impression that NiMH batteries are free from this defect. However, Sony's manual for P31/51/71 speaks about memory effect on NiMH batteries. Will be grateful for expert advice in this regard.

NHL Apr 23, 2003 9:20 AM

FYI from before:
http://www.stevesforums.com/phpBB2/v...highlight=nimh

AAs are very popular now, powerful, as well as inexpensive... if you want Li-Ion, like the others proprietary batteries then there's always the to be released Samsung CRV3 Li-Ion rechargeable which slots right in-place of two AA's. 8) 8) 8)

How about inexpensive films? (Hint CF flash...) :oops:

kschewe Apr 23, 2003 7:24 PM

the newer Nickel-Metal Hydride batteries have no memory effect unlike the older nickel cadmium. they are cheap and last a long time
http://data.energizer.com/batteryinf...al_hydride.htm

Memory/Voltage Depression

The issue of "memory" or voltage depression has been a concern for many designers of devices, using nickel-cadmium cells. In some applications where nickel-cadmium cells are routinely partially discharged, a depression in the discharge voltage profile of approximately 150 mV per cell has been reported when the discharge extends from the routinely discharged to rarely discharged zones. While the severity of this problem in nickel-cadmium cells is open to differing interpretations, the source of the effect is generally agreed to be in the structure of the cadmium electrode. With the elimination of cadmium in the nickel-metal hydride cell, memory is no longer a concern.


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