Patent Publication Number: US-D600640-S

Title: Extension battery

Description:
FIG. 1  is a rear perspective view of an extension battery, showing our new design; 
         FIG. 2  is a top plan view of the extension battery shown in  FIG. 1 ; 
         FIG. 3  is a front elevation view of the extension battery shown in  FIG. 1 ; 
         FIG. 4  is a right side elevation view of the extension battery shown in  FIG. 1 ; 
         FIG. 5  is a left side elevation view of the extension battery shown in  FIG. 1 ; 
         FIG. 6  is a rear elevation view of the extension battery shown in  FIG. 1 ; 
         FIG. 7  is a bottom plan view of the extension battery shown in  FIG. 1 ; and, 
         FIG. 8  is a top plan view of the extension battery shown in  FIG. 1 , where it is illustrated that the extension battery is assembled with an iPhone or any other similar device. 
       The broken lines showing connectors in  FIGS. 1 ,  2 ,  4 ,  6 ,  7 , and  8 , recesses in  FIGS. 1 and 6 , an iPhone in  FIG. 8 , and a light in  FIGS. 1 and 4  are for illustrative purposes only and form no part of the claimed design.