Casio Cassiopeia BE-300 PDA internal battery. Fits with compatible part number: CGA-1-105A. Battery Technology: Li-Ion, 3.7 Volts 750 mAh. 100% OEM Compatible Order the CGA-1-105A Today - 1 Year Warranty, 30 Day Money Back No Risk Shopping, Secure Online Ordering Guaranteed! Price includes tools and installation instructions.See all the Handhelds this PN CGA-1-105A will fit!