Voltage on external battery packs (1 Viewer)

Di Stone

Well-known member

• Nov 7, 2007

• #1

Could anyone tell me what voltage reading I could go too on a 'home made' external battery pack? I've a friend who tells me he can make me some but needs to know the voltage reading. He also mentioned something about the polarity coming from the centre, would that be right?

I use both a Kyocera SL400R and Coolpix 4500 in case there will be different readings.

Any and all help very much appreicated :t: If I hadn't have insisted on decorating the house, I might be able to find the manuals for the cameras! House is starting to nice though 3

Di

 

Johnny1

Well-known member

• Nov 8, 2007

• #2

The CP4500 uses a 7.4v battery if thats any help to you?

 

Feathered one

Well-known member

• Nov 8, 2007

• #3

You wrote

"He also mentioned something about the polarity coming from the centre, would that be right?"


Your friend needs to know if the centre pin of the power connector is + positive or - negative, get it wrong and you can probaly say goodbye to the camera. So be carefull.

Malc

 

T

Texun

member

• Nov 11, 2007

• #4

The AC to DC power supply reading at the male dc input plug will usually read from 10 to 20 percent higher than nominal voltage. Also, be VERY careful with polarity. 7.4 volts is a very common camera battery voltage.

 

paddyenglishman

Semper in excretia sumus; solum profundum variat.

• Nov 30, 2007

• #5

polarity

usually on the socket of any decent appliance ,in this case the camera body , there is little symbol that will indicate polarity .It will be a circle with a line drawn out and + or - next to it ,and an incomplete outer ring marked the same way Circle is centre pin and the "c" is outer

http://support.radioshack.com/support_tutorials/batteries/pwrgde-2G.htm


this explains better than i can .Be warned wrong way round will make the smoke come out, all the rubbish about positive and negative electrons is untrue , Electricity is smoke , once you release the smoke it will never work again !!

 

erniehatt

Well-known member

• Nov 30, 2007

• #6

Some of these circuits have a polarity protection circuit, I know my Canon does. Ernie

 

paddyenglishman

Semper in excretia sumus; solum profundum variat.

• Dec 1, 2007

• #7

Some yes , but which ones is the tricky point!!!!
Nice adapter btw ernie thanks