On Thu, 22 May 2014 17:38:43 +0100, "Ian Field"

I would check first to see if the battery is being adeqautely charged
by the Chinese charger. Charge the battery in situ, and then
remove it, and do a discharge test, and see how many mAh it supplies.

Peter



wrote:

A while back I bought a cheap Chinese shaver, at best it only gave about 4
shaves per charge - when that deteriorated to 2, I opened it up and had a
look.

It has a single AA cell marked as Ni-Mh - 500mAh (I have higher capacity
Ni-Cd cells than that).

In the past I've tried replacing shaver Ni-Cd cells with higher capacity
Ni-Mh, only to find that the higher internal resistance results in not much
improvement on the worn out cells being replaced.

Since this shaver had a (marked as) Ni-Mh cell, I bunged in a 2300mAh low
self discharge type (brand new).

The shaver works, but seems sluggish - and no surprise, still only does 2 -3
shaves per charge.

So let the guessing games begin - did they fraudulently stamp Ni-Mh on a
Ni-Cd cell, or is the 500mAh cell optimised for high current at the expense
of total capacity?

Maybe I'll pull it apart again and stick a 600mAh Ni-Cd cell in it, but I'd
be interested to hear any opinions in the meantime.

Thanks.