On 12/09/2020 01:59, Robert Riches wrote:
> For some
> applications, (Wahl series 4000 shavers, for example) a NiMH cell
> of the same physical size can replace the original NiCD cell, (as
> mentioned) the original charger still (at least the old
> high-current type) works, and the NiMH provides about 3X the
> shaves per charge compared to the original NiCD.
Be very careful of this. Fast chargers for nickel cells use the delta
peak detection - a fully charged nickel cell will show a DROP in peak
voltage as it reaches full charge. This is detced to switch the fast
charger off.

The drop  is far smaller on NiMH and sometimes not enough to switch the
charger off..not good.


--
Labour - a bunch of rich people convincing poor people to vote for rich
people by telling poor people that "other" rich people are the reason
they are poor.

Peter Thompson

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