Anyone own this type of device? Good\\bad experiences? Brand or any spec to look for. Thanks\n\nAmazon.com: PowerAll PBJS12000R Rosso Red\/Black Portable Power Bank and Car Jump Starter: Automotive\n\nAmazon.com: Antigravity Batteries Micro-Start PPS XP-1 Multi-Function Jump Starter \/ Personal Power Supply: Automotive\n\n\nAnyone understand what he's sayin? Anything specific to the model of the jump starter.