| 摘要 |
The present invention discloses a portable labor-saving battery device for a electric vehicle, said battery device capable of providing power when installed on said electric vehicle. User is able to disassemble said battery device, drag and recharge said battery independently without much effort. Furthermore, said battery device is used as shopping cart to provide more functionality. Said battery device mainly comprises a battery set 1 having a socket 111 for recharge and a contact on a bottom of said battery set for connecting to said electric vehicle, a cap 12 implemented on a bottom of a upper surface of said battery set, said cap lying next to said upper surface of said battery set when folded up and providing a load-bearing space when bent down. A wheel set 13 is implemented on a bottom of a lower surface of said battery set for providing mobility. Said battery set having an extension bar 14 penetrating through both sides of a top of said battery set and extending into said battery, wherein said extension bar is extensible inside said battery set for user to drag said battery device easily other than hand carry said battery set. |
