scruff1 Posted April 16, 2011 Report Share Posted April 16, 2011 Hello all,it's been since 2008 when I was last on here but my username "scruff" would not activate. So now I'm scruff1 ;DAnyway,I'm hoping to use an alternative means to improve power duration on a Canon A470 digital camera. The conventional AA batteries don't last long,especially for 2 hours of video recording. The DC socket on the camera is 3.15v which I've know purchased a jack. I was contemplating on wiring that to a Tamiya type connector (female) And then connect a radio controlled 5000mAh battery pack. If this setup is ok,would a 7.2v battery be ok,or is it too much juice? I'm hoping to do the same with a digital video recorder,which uses a 5v power point. Both are mobile applications where a static power socket can't be used.thanksPaul Quote Link to comment Share on other sites More sharing options...
Hero999 Posted April 16, 2011 Report Share Posted April 16, 2011 You need a DC-DC converter to get 3V from the higher input voltage.Have you measured the current drain of the camera? If it drains two AAs in 2 hours 1A is probably a good estimate but the peak current demand could be higher.Perhaps you should use a couple of D cells instead? It should last three to four times as long. If you use rechargeable D cells make sure they have a capacity of over 8500mAh, some cheap rechargeable D cells are really C or AA cells with extra padding. Quote Link to comment Share on other sites More sharing options...
scruff1 Posted April 17, 2011 Author Report Share Posted April 17, 2011 Superb reply Hero,thanks. I'd say the D cells would be practical. I wasn't aware that D cell packs existed. I've only seen 3.6v sticks,would that still be too much? Quote Link to comment Share on other sites More sharing options...
Hero999 Posted April 17, 2011 Report Share Posted April 17, 2011 Superb reply Hero,thanks. I'd say the D cells would be practical. I wasn't aware that D cell packs existed.THey don't, you have to build your own by connecting two in series. Fortunately you can buy dual D cell holders.I've only seen 3.6v sticks,would that still be too much? I don't know, 3.6V might be too much, and if you're talking about a Li-ion cell which is 4.2V when fully charges, then it almost certainly is. The only way to know for sure is to seek advice from the manufacturer. Quote Link to comment Share on other sites More sharing options...
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