The battery in our Toyota 4Runner had died twice in the driveway. It wasn't an old battery, and the cause remained a mystery. So before leaving on a three-day, early November 4x4 journey deep into Canyonland's remote Maze District, I purchased a tiny XP-3 lithium battery pack from Utah's Rocky Mountain ATV/MC.
|Remote campsite where battery died.|
For three days and nights alone, we charged and recharged our phones and camera batteries from the truck's battery (there was data service, for better or worse; and nightfall by about 5:30 p.m. left us with little to do). While the XP-3 comes with a web of USB-type charging connectors and ports, fortunately they and the XP-3 went unused.
The XP-3's diminutive 10.5-ounce, 6″ x 3″ x 1″ size (larger models are available) makes it easily stowable. And while its triple-figure price seemed high at first, the device spared us the need for a four-figure call for help ... or a long wait till help came along.
NOTE: There have been reports of these power packs heating up excessively when being used.