Update:After a couple of months of use, it loses charge more quickly. It also fills up faster when charging but not necessarily the same amount of charge. Lastly, I had the chance to try the car battery jumper function. Car didn't start.By par, this is the biggest battery power pack that I have. It also has the most attachments and accessories being a multi-function charger and car jump starter. It came with a zippered black leatherette case that otganizes everything with straps for each kind of attachments.It came with 3 LEDs lit (out of 5 for full charge) so I plugged it to the wall with the AC adapter. The AC adapter is multivolt, it works 100V to 240V and 50 Hz to 60Hz, making it compatible with a lot of countries. It can also charge using the included cigarette lighter plug. Besides the 5V, 2Amp USB output that is normally used for tablets and phones, and the jump starter, it also provide a 19V, 3.5Amp output for notebooks and 12V, 2A output for a variety of car accessories.For smaller charging jobs, it work excellent for my iPads, smartphones and mini speakers. With all the accessories included, what notably missing are the 30-pin Apple connector and the Lightning cable.To jump start a car battery, it is important to make sure the power pack has enough juice. It should not have less than 3 LEDs in capacity which represents 60% of total full charge. Also you have to disconnect the charger within 30 seconds after starting your car. I have yet to test the full feature of the jump starter though. My battery on the Accord is three years old but not completely gave up the ghost; so having this in my glove compartment will hopefully prove to be useful in times of emergency.I have several power packs with LED flashlights, this has the brightest lamp I have seen so far. You turn it on by pressing the power button for two seconds. It will cycle from steady light and two modes of emergency flashing lights - fast and slow.The user manual is short but has done well explaining how to use the charger/jumper. Don't lose it or make a digital copy for future.I was provided a sample of this product, so I could use it and write my unbiased review.