Camera battery pack voltage dropping

Thread Starter

lentilbake

Joined Apr 8, 2006
2
I have an (old but still worth keeping) Fuji Finepix 4900 which
uses the 3.7v NP80 type Lithiunm Ion battery. The problem is that
even with a new battery freshly charged the shooting capacity
is pretty bad.

I'd like to make an external battery pack to run the camera from 4 x AA sized, high capacity, NiMH batteries which would give 4.8V so I'll need to drop the
voltage to 3.7V as efficiently as possible. I'm going to use a dummy battery to pick up the contacts inside the battery compartment and run wires to the pack.



I'd like to know the best way of doing this with the minimum of components.

The camera is rated at 5V 4W (from the plate on the camera bottom).

Any help would be appreciated - not too technical, practical if possible.
 

paultwang

Joined Mar 8, 2006
80
Originally posted by lentilbake@Apr 8 2006, 05:00 PM
I'd like to make an external battery pack to run the camera from 4 x AA sized, high capacity, NiMH batteries which would give 4.8V

The camera is rated at 5V 4W (from the plate on the camera bottom).
[post=15991]Quoted post[/post]​

I'd just plug them in :)

The camera is rated 5 volts

Your 4xAA NiMH batteries are rated 4.8 volts but in reality is approximately 5.48 volts no load. ... Close enough.

If you want 3.7 volts, use 3xAA NiMH batteries instead.
 
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