I have a cordless phone with rechargeable NiMH cells. The instructions point out I must wipe clean the ends of the cells and also the contacts.
Is it really likely that "normal" dirt (in other words invisible dirt ) may affect performance?
ISTR that an NiMH and a NiCd have an internal reistense of about 0.24 ohm. How much resistence would someone's finger grease have?
Are there other residues which can build up on the battery and and contacts from normal use? Perhaps from gas vebting from the cells or just a reacton with the atmosphere.
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Is the need to wipe cells & contacts equally applicable to silver oxide cells? Does it depend on the application?