Stanley 300 AMP / 600 Peak AMP Power Station w USB Charger with Nancy Hornback 

It's a great gift from Stanley? I had to buy

I bought one at Wal-Mart for just 1 easy payment of 16.99, instead of 3.

manual on my STANLEY says do not use negitive terminal on battery, use car body

Does the charger have to be connected to the electric current to know if it has a charge or not?

I lost all hope from the beginning when put them backwards

Spend about 50% more buy a lithium battery pack car jumper for any cars batteries jump start.The lithium battery pack can stay strong enough to jumpstart a car for even for year without recharging the lithium battery.Acid battery pack charger are outdated technologies designed and have to recharging the battery every 3 months.

So u have to charge it the first use for 24 hours

I do not trust a 40 dollar device to start my car, I have a 1000 amp instaStart I bought 3 years ago on amazon for 200$