An oddity in applied electronics

My MacBook Pro computer hs a power cord with a light that glows red when it is charging and green when the battery is fully charged.

My Oly battery charger does similarly, red and blue (I think!).

Every other battery charger I can remember using had a similar two color light function so you could identify what was going on.

Good design -- two clear messages that cannot mean anything other than their intended meaning.

Except the Panny charger for my FT4 battery (and now Im wondering about the G1 battery charger -- but I can’t remember).

This charger has a light that glows /green/ when it is charging and switches off when the battery is fully charged.

That's wrong. No light is the null state -- it could mean that the battery is charged or it could mean that the power is off or it could mean that the battery charger is malfunctioning or it could mean that the light has failed.

Odd that an electronics giant -- and particularly a battery giant -- should make a design error like this.

Maybe they exhausted themselves designing the excellent ergonomics of the cameras and just couldn’t be bothered thinking about the charger!

Cheers, geoff

--
Geoffrey Heard
http://pngtimetraveller.blogspot.com/2011/10/return-to-karai-komana_31.html