External Battery packs for the Zaurus SL-C700 (free shipping with any other item) 

 
click for details SL-C700 ext. Battery pack ... 
  $24 USD 
over voltage protection circuit built in. Takes 4x AA batteries (not inc.)

  

    
Note about the battery pack:
      
Therefs an ON/OFF switch on the back,

        ON is for rechargeable batteries (1.2 Volts)

        OFF is for alkaline batteries (1.5 Volts ) (with over 
        voltage protection)
      
(Using "ON" with Alkaline batteries (1.5V) 
        may damage the charge circuit of the PDA as this disables the over voltage 
        circuit)

      
  

 same with an L shape plug + $3 USD 
(battery packs can be used with Alkaline or Rechargable batteries, see note!) 


click for a bigger pic 
Panasonic world voltage fast charger ... $29 USD 
comes with 4x NiMH (no memory) rechargables (4x 1.2V 2100mAh, charger can recharge 
  these in about 4 hours) 

  8400mAh = over 4x the large Sharp battery or over 
  8x the small Sharp battery