"john d hamilton" wrote in message
...
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?

Have you used them yet or are you putting them in the charger straight from
the box?

If they are new they will be fully charged already. My understanding is that
the 'sensor' for detecting full charge is the drop in current when the cell
goes from 'active charging' to ' fully charged'**, so it suggests that you
are probably currently 'over'charging them.

Let them run down and then try again. Calculate the approximate charging
time and start charging so that you can check if the charger light goes out
within an hour or so of the expected time.

**I'm not an expert on this, so I'm happy to be corrected on the mechanism
for detecting full charge.