MPF Products 850mAh H503448 1S1P Battery Replacement Compatible with Skygolf Skycaddie AIRE X8F Golf GPS Rangefinder Replacement for the Following Battery Model/Part Numbers: H503448 1S1P. Compatible with the Following Models: SkyGolf SkyCaddie AIRE, X8F. 3.7V 850mAh 3.15Wh Lithium-Polymer Rechargeable Battery Pack. 1 Year Replacement Warranty. MPF Products is a Registered Trademark.