The Eiger MPMan F20 was a similar model that used 3.3 V SmartMedia cards for expansion .
The Eiger MPMan F20 ran on a single AA battery , instead of rechargeable NiMH batteries .
The Eiger MPMan F20 was a similar model that used 3.3 V SmartMedia cards for expansion , and ran on a single AA battery , instead of rechargeable NiMH batteries .