Charging Voltage

  morddwyd 15:35 02 Dec 10
Locked

Am I right in believing that the charging voltage for a battery operated rechargeable device is slightly higher than the actual operating voltage?

For example, a 4.5 v device is recharged at around 6 v, and 12 v at around 14?

  MAT ALAN 15:45 02 Dec 10

click here
might not answer ya question but it got graphs n stuff...

  mooly 17:49 02 Dec 10

Yes and no. It depends on the charging circuit. A battery needs a higher voltage than its nominal value... but not much higher. A 1.2 volt cell needs to have the current limited to some fixed maximum, and also to have a maximum voltage that the cell can be taken too.

Equipment with complex charging circuits can quite happily charge a battery (say a 6 volt one) from anywhere between 2 and 20 volts... but that's because of the electronics involved.

So a battery operated "device" can mean many things you see. But to force current into a battery or cell, yes voltage must be higher.

  Fruit Bat /\0/\ 18:58 02 Dec 10

Yes approx 15% higher

  morddwyd 07:55 03 Dec 10

Thank you.

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