Small Batteries?

[Demonic69]

I'm looking for a way to use small batteries to power a marker instead of PP3s.
Been looking at all sorts if variations but can't find anyhitng in particular that would work.
Could I use 2 4.6v or 3 3v but need a decent mAh, around 500.
They need to be slim and possibly rechargeable...
http://uk.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=1083711&N=401
Was something I was thinking about, but would ideally be smaller for the voltage.
Also.. Can I just daisy-chain them?

Cheers

 

[John C]

Yes, you can connect them in series to get double the voltage.

If you connect them in parallel you get the same voltage, but double the current capacity.


7.2V should be enough. But this depends on the characteristics of the battery and the hardware on the board. You cant really have too much voltage, so I would go with 2 4.6V cells wired in series giving 9.2V.


500mah is easily enough for a paintgun, it only has to light a couple of LEDs and trip a solenoid every so often. Especialy if you rig it so that you can swap out the battery pack for another, freshly charged one should the need arise.

 

[Demonic69]

Don't know how I'd go about charging random batteries tbh...
Also can'#t find many rechargeable 4.6vs...

 

[John C]

At some point you will need to charge the pack, so if you dont know how to go about it then you might want to learn.



How about 3 3.3V cells?

 

[Demonic69]

At some point you will need to charge the pack, so if you dont know how to go about it then you might want to learn.

Any tips?

How about 3 3.3V cells?

Can find 3v Coin Cell type, just not rechargeable with a decent mAh, only about 100.

 

[Ahdinko]

Cant you just use 1, 9.6v cell? RC car/plane/helicopter batteries range from about 600-1400 mah, depending on what quality one you get, and start from about £9. Rechargeable and all that.

 

[Demonic69]

Do you know of any smaller than a PP3 battery though?

 

[Ahdinko]

Ah.. Didn't think of the size issue..

 

[Dark Stranger]

http://uk.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=1083711&N=401

Three of these would be just as big as a pp3. (If not bigger)

I do not think there are any re-chargable batteries smaller than camera sort of size.

 

[Demonic69]

It's OK if they spread out, it's the depth/width of the PP3 I need to get rid of.
If I could cut it in half that would be good