No one should be without one of these. I used the Tensee Car Jump Starter for the first time the other night on a neighbours car that broke down outside my flat. The engine just wouldn’t start, we tried several times until the 1.8 engine finally started using the Tensee Starter, and it really is effective without the hassle of thick jump leads. I couldn’t believe how much power this thing has for a small device – it fits in my coat pocket. It initially charged up in 5 hours and was ready to go multiple times. It also charges any USB devices and has an emergency light too. Has all the necessary technology and safety features so it won’t damage your mobile devices when charging and won’t short circuit when starting a vehicle – really great unit, highly recommended.