Basic guide of how to make one. Or we should be able to find other ones made for different players.


http://i13.photobucket.com/albums/a266/Slade_au/DSC00178.jpg

In order to build the above external battery, you will need:

Jaycar 2 X D CELL SIDE BY SIDE Battery Holder
Generic Hook-up Wire (Length to suit your own needs)
Soldering Iron
Solder
Plug to Suit. I liberated one from a multi-voltage power adaptor. Jaycar do stock a straight plug, ask them for details.

Connect the two battery packs together using cable ties and clip off any excess plastic.
Solder one black wire to the opposite battery holders red wire. This will increase the voltage across all the batteries upto 6v (non rechargable) and 4.8v (rechargable).
Solder your extension cable to the other red and black wires, keeping black to negative and red to positive.
Check which pin on the plug is positive and negative and solder the correct wires.

Test your battery pack using a multimeter first! Then plug the battery pack into your PMP. If the led doesn't blink to show the PMP is charging, then remove the plug immediately and check your plug again with a multimeter.
You can also try changing the wires to the plug around and retest the setup again.

Once the led flashes on the PMP to indicate charging, congratulate yourself. You've just made a massive external battery pack.

eBay sell a large selection of "Battery Extender's". These could be converted with a different plug to work in the PMP.
In theory a "4 x AA Battery Extender" with 2500mHA rechargeable's should last the same time as the internal battery.

See also

DC power Plug