Double-starting power—for diesel or gas cars, trucks, RVs For 12-volt engines Starts your engine in the coldest weather. Ideal for hard-to-start diesel vehicles. Doubles starting voltage for sure-fire start-up. Series-parallel switch draws on 2 batteries until engine starts, then automatically switches back to single-battery voltage for continuing operation. Both batteries charge as you drive. Easy to install. Instructions included. Battery and cables sold separately. 12- to 24-volt switch.
Price: $262.55
Click Here For Detail