You may have this problem. Battery Dead in the middle?

Do not worry!

Battery jump starter can help you, Ex-works USD60/kit.

The following is the video for using, please copy and check.
The smallest and lightest portable power with patented technology in the current market.

Multi Function: Support 12V car for emergency start, portable illumination and various mobile phone, PSP, MP3/MP4

Use 12000mAh high capacity high power polymer cells, fast charging and low self-discharge, cycles can reach 1000 times.