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A portable electric tool with a mountable bi-directionally battery holder has a head, a handle, a tool holder and a battery holder. The tool holder is connected to a motor and is securely mounted on the head, and the handle is integrally formed with the head and has a bottom surface and a dovetail k

A portable electric tool with a mountable bi-directionally battery holder has a head, a handle, a tool holder and a battery holder. The tool holder is connected to a motor and is securely mounted on the head, and the handle is integrally formed with the head and has a bottom surface and a dovetail key. The battery holder is mounted on the bottom surface of the handle and has a pair of parallel channels that can contain the dovetail keys of the handle. When using the portable electric tool with a mountable bi-directionally battery holder in accordance with the present invention, users can rotate the connecting direction of the battery holder to provide a convenient way in use.

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1. An portable electric tool with a mountable bi-directionally battery holder comprising a head having a front surface; a motor mounted in the head; a switch mounted on the head and electrically connected to the motor; a tool holder connected to the motor and mounted on the front surface

1. An portable electric tool with a mountable bi-directionally battery holder comprising a head having a front surface; a motor mounted in the head; a switch mounted on the head and electrically connected to the motor; a tool holder connected to the motor and mounted on the front surface of the head; a handle integrally formed with the head and having a bottom surface with two opposite edges;a bottom concavity with four inner edges defined in the bottom surface;an engaging element mounted on the bottom surface; anda conduction piece received in the bottom concavity and having a periphery; anda recess defined between the inner edges of the bottom concavity and around the periphery of the conduction piece; a battery holder detachably attached to the handle to provide an electrical power to the motor and having a top surface;a receiving element mounted on the top surface and detachably engaging with the engaging element on the bottom surface of the handle to make the handle have a capability of adjusting 180° relative to the battery holder; anda locking element mounted on the top surface and engaging with the recess in the handle and havinga button with an inside surface;a spring mounted in the battery holder and abutting against the inside surface of the button; andan L-shaped extending hook portion mounted on the inside surface of the button and engaging with the recess in the bottom surface of the handle.2. The portable electric tool with a mountable bi-directionally battery holder as claimed in claim 1, wherein the conduction piece has two parallel edges; two positive electrical terminals connected to each other; and two negative electrical terminals connected to each other, being opposite to each other and adjacent the positive terminals; and the battery holder further comprises a chamber defined in the top surface and havinga short edge;two parallel long edges; andan opening end formed opposite the short edge; and four electrical contacts mounted in the chamber in the top surface, selectively contacting with two of the electrical terminals and comprising a positive contact contacting with one of the positive terminals mounted on the conduction piece on the bottom surface of the handle;a negative contact contacting with one of the negative terminals mounted on the conduction piece on the bottom surface of the handle; andtwo charging electrical contacts used for charged.3. The portable electric tool with a mountable bi-direction battery holder as claimed in claim 2, wherein the engaging element of the handle is two dovetail keys integrally formed on the opposite edges of the bottom of the handle; and the receiving element of the battery holder is two channels respectively defined along the parallel long edges to selectively receive the dovetail keys on the handle respectively.