1, the battery aging, driving electric storage ability is poor, most of the energy saving, waste; 2, check the engine work is normal, launched the multimeter test respectively before and after launch the voltage; 3, take a look at the battery contact wires and anode contact whether is was, gently rotate easily pull out; Or contact scale too much, a little clean up, someone USES hot water; 4, if is old vehicles whether to consider: for a spare battery. Some vehicles are equipped with alarm, especially the holidays (or wedding day) firecrackers sound can make alarm sirens throughout the night, what a good battery also lack electricity consumption; In addition also may be the computer, that will suggest you go to the 4 s shop to investigate.if you want diy go -:>
auto diagnostic tool