William Sommerwerck wrote:
Have just bought the latest type of rechargeable *Hybrid* batteries from
Maplin, made by Uniross, called Hybrio. (also Argos are now selling them
made by Sanyo).

They are supposed to have the advantage over Nickel Metal Hydride in that
they don't have the 'memory effect'. Also the advantage of the alkaline,
in
that they dont self discharge at quite a high rate when not being used.

The charger I have is an Energiser designed for Nickel Hydride batteries
and
which indicates when a battery is fully charged, by the charging light
going
off. But when putting in the Hybrid batteries the light does not go off.

Is there an harm done to these hybrid batteries if they are overcharged?


Who knows? HAVE YOU ASKED THE MANUFACTURER? No, of course not. That's too
much trouble, isn't it?

Good grief. Do you expect the people in this group to have detailed
technical information about about a new product?

By the way, I've not heard of NiMH cells suffering from memory effect.


NiMH cells have done very well for me, using a fast charger with a light
for each cell. After ten years, all twelve still hold a charge for weeks.

If more than one cell is charged on the same circuit (the same indicator
light), the charger should shut off when the first cell is charged.
With each charging cycle, the state of charge of the lowest cell may be
lower and you'll get less service out of the set of batteries. It could
seem like memory effect. The solution is the same, to drain each cell
and then charge.