Accessories

Works fine but doesn't hold charge for long
If you get this as an alternative to jump start cables, then do keep it plugged in as it won't hold peak charge for long. And it does need to be at or close to peak charge to jump start a car. It will power up other 12V accessories for quite a while, so no problems there.

And yes, the variety of options on it (light, LEDs, etc) are nice and much more useful. Definitely better than the spare battery I used to have for such uses. The carry handle itself is a huge benefit.

Great Jump Starter
This is a great product, I would recommend it to anyone as a emergency, security item for your vehicle. It is excellent especially for my wife when she is on the road by herself. Even NEW cars have problems and this is a good problem solver!

Works fine on an '81 Subaru.
Bought one of these Black & Decker 300 Amp jump starters last month--and had to use it the other day when my '81 Subaru's battery finally died. Followed the instructions for a positive terminal battery hook-up, attached the ground clamp to car frame (must be bare metal!!!), turned on the jumper and hopped in the car to turn the ignition. Voila! Immediate start from a cold engine.

Very modest size and easy to stash in a vehicle. Nice that the metal clamps are stored efficiently right on the unit. Instructions note that units are already partially charged before shipping and to charge for some additional time once the green light starts to flicker during wall charging.

priceless when needed
When off roading alone its comforting to know that youve got a way to get started if the battery dies. Has very bright work light that could allow you to walk for hours if need be also.

Fantastic, back up lightweight jump starter
Great little jump starter at a great cost. I was shocked at the small size of this unit when it arrived and a little skeptical, but it has successfully jump started my 3.3L V6 engine from dead now twice, once in freezing conditions. Admittedly it does strain a bit to get the engine turning over, but it does what it's meant to do, so what more can I say.
Also, the fact it can be charged from the car accessory (cigarette lighter) outlet as well as the mains supply means once the engine is running this can be staright back on charge in the car.
I always carry this as a back up now.