There is a moment that every car driver has known. This particular moment or, as you roll in the countryside, your battery leaves you for no reason. No traffic, no network, and to top it all, the sun so pleasant of the beginning of the day turns into a torrential rain obliging you to change your battery the hood glued to the face feet in a puddle. Exaggerated? Not that much when you think about it. Still, there is something that could save us this kind of trouble: the battery booster.First of all, it is important to mention that a battery booster is not a battery charger as we can imagine. If the operation is exactly the same, connecting the clamps of the device to the positive and negative terminals of its battery to recharge it, the undeniable advantage of the booster is in its autonomy.