Now to answer some questions..
The main difference between the XP-1 and XP-3
Power Ports------ XP1 has 4 output ports to power electronics and jump-start... 19v laptop port, 12v port and USB 5v port and then Jump Start Port... XP3 only has USB 5v port and Jump Start Port.------
Size-------- XP1 is 6" x 2.8" x 1" thick 14 oz the XP3 is 5" x 2.8" x 1" and 12 ounces. So basically XP1 is one inch longer-------------
Parts that come with it-----------XP1 has a carry case, and 16 tips to fit the laptops, or cell phones or electronics you or anyone might have, 2 small cords for attaching these tips to, mini jumper cables and a car charger and wall charger.................. The XP3 does NOT have a carry case and comes with a 3 into 1 USB cord and the mini/ jumper clamps and car and wall chargers... The three tips on the USB 1 into 3 cord are Apple 30 pin, Mini USB and Micro USB tips... but if you have any USB cord already that powers your device you just plug that into the USB port on the Micro Start and it works fine.
Temp handling and Amp Hours... this battery actually will work better than regular lithiium lifepo4 battery at colder temps... it's a much more powerful form of lithium than found in our regular batteries (but not good as a vehicle battery) It's just massively front loaded with discharge abilities (very high C rating) It has an actual amp hour rating of 4Ah... It will sit in a car fine in Vegas heat... but like anything if you have it on the dash that is NOT good.
Any Questions let me know...