canon BJC 50 , 70 , 80 battery question

[williB]

there are four terminals on the battery...
across the end of the battery is ' +' , 'C' , 'T', and minus
does anyone know what " C " & " T " mean..??
???

 

[Oznog]

"T" is thermistor. Many charging methods require a constant monitoring of the pkg's internal temp during charging.

"C" is probably common. It could have been "-", but I guess "Common" better implies that the thermistor is connected between "T" and this terminal rather than between the "T" and the "+" (possible, but unlikely).

 

[williB]

thanks..

 

[williB]

They dont seem to be charging ??
i cant find the one that i took apart.. but there was some electronics in there..
i have had them charging for about three hours total and their voltage hasnt changed..
NOTE i dont have the correct charger .. just the batteries..

 

[williB]

nobody..?
I am thinking that the ' C ' is some sort of charging pin..

 

[williB]

canon isnt giving up their user manual , it is there , but when u click on it nothing happens..

 

[williB]

just thought i would ask again..

 

[Nigel Goodwin]

Are you sure the batteries aren't faulty?, these types of batteries often have a fairly short life - and if they have been left discharged this tends to ruin them.

 

[williB]

no not discharged ..one reads 9.5V the other reads 10.3 V..