Bests & Worsts Reviews from Amazon

Note that this thing CHARGES your car battery, so that the car battery will have enough juice to hopefully start your car. This does NOT jumpstart your car. For jumpstarting your car, you really need a jumpstarter with lots of current, and direct connection (i.e. by opening the hood) to the car battery terminals. This is NOT meant for that. It is a battery *booster* which means it adds more charge to your car battery. Recharging takes time because it cannot pump too much current through that cigarette lighter (otherwise it will damage it). That's why you'll need to wait 15-20 minutes. There are faster chargers in the market, but because faster chargers put out more current for the charging, you will need to open the hood and connect directly to the battery terminals - not a tough job, but that takes at least 5-10 minutes anyways and you have to get out of the car, which can be dangerous if you're stalled by the road. Also, note that depending on your car model, you WILL have to turn your ignition key to the "accessory" mode (i.e. car radio on) before you can charge through the cigarette lighter. I believe this is the problem of an earlier review where the charger beeps right after plugging it in. I have used it a couple of times and it works perfectly. Sure, 15-20 mins is a long time to wait, but hey I always have a good book handy. I dock 1 star from the ratings because I thought the instructions could be clearer and I wish the TV commercial hadn't been so misleading - letting people think that you can jumpstart through the lighter - big NO NO... But otherwise, as a charger, this is GREAT!