A flat battery is a very common problem. It might happen because of extreme cold or by accidentally leaving the lights on in the car overnight. It can be quite troublesome to be left stranded on the road, in the dark, or in some remote area. They're very handy devices that is a must for every new driver. Never again will you be left helpless because of battery problems.
The most important thing about them is they can recharge battery power, after which you can then start your vehicle. The rest of the job is done by the car's generator. Once the ignition is on, the car will then fully charge battery. Some kinds of jump starters work only when the battery is not totally flat. If it has some spark left, it may be recharged. However, if it's totally discharged, it can't start it.
You have to keep your jumper cables in your car since the unit is connected to the car battery with the aid of these cables. These include two cables with crocodile clips on each end from the cables. Join the positive ends from the car battery and the unit and then join the negative ends of these two. The vehicle battery has become ready to be recharged. Remember that you need to be careful about joining the right ends of the cables, otherwise it could result in a spark. You may also go ahead and take help of another car to help starting your car. Just join the cables in a similar manner.
The portable battery starter unit is a very convenient device. It may start a battery whether it has even some power left inside it. These are small packs that have enough capacity to jump start a set battery, but they get discharged if left for too long. They may be charged form any normal socket within your house, so keep charging them regularly or you might find yourself having a dead jump starter when you really need one.
Particular kinds jump starters come with air compressors to assist tires, basketballs etc. Some in addition have a LED that can help you see at nighttime if you wish to recharge your battery. You can also use them in the house during a power cut. Having a 12 volt battery, these jump starters can jump most cars and therefore are a very great tool.