Car jump starter
Car jump starter helps you start your car when your battery fails. its very easy to use. just plug the positive cable to the positive battery terminal and the negative cable to the negative battery terminal while the battery is in the car then go ahead and start your car. It also comes with a tyre pump so you dont ever have to worry if you have a flat tyre. Also it has a torch light. Its good to carry in your car for emergency purpose. it comes with a chargeable battery and a charger.
NOTE : This particular product is only available in second hand.