A kind of built-in battery and the fishing rod for adapting to different thicknesses rod body,Include: a grip part,For the tube body with hollow space of a strip,User is provided with what to grip； The upper end of the one winding mechanism position what grip part,The fishline of the fishing rod is stored with what； The winding mechanism includes motor what scrolling fishline in an automated way,An and rotating handle what scrolling fishline in a manual fashion； In the hollow space of multiple battery position what grip parts； Electric power needed for multiple battery provides fishing rod running with what； Multiple battery is connected configured with conducting wire in the grip part,And the conducting wire extends for connection to the winding mechanism,So that the electric power of multiple battery can provide winding mechanism running； Above the one fixing structure position what grip part； One rod body position what fixing structure top,The rod body is an elongate structure； The rod body is inserted into the fixing structure close to one end of the fixing structure； Wherein the fixing structure system can be inserted into the rod body of different thicknesses.一種可內置電池及適應不同粗細竿體的釣竿，包含：一握持部，為一長條狀之具有中空空間之管體，用於提供使用者握持住；一捲線機構位於該握持部的上端，用於收納該釣竿的釣線；該捲線機構包含一馬達用於以自動的方式捲動釣線，及一旋柄用於以手動的方式捲動釣線；多個電池位於該握持部的中空空間中；該多個電池用於提供該釣竿運作所需的電力；該握持部內配置有導線連接該多個電池，且該導線延伸連接到該捲線機構，使得該多個電池的電力可提供該捲線機構運作；一固持機構位於該握持部上方；一竿體位於該固持機構上方，該竿體為一細長狀結構；該竿體靠近該固持機構的一端插入該固持機構內；其中該固持機構係可插入不同粗細的竿體。
