I have an xp10 as well... maybe Ill throw it in a bag and throw the bag in an ammo can... 
OH CRAP! Bet you never had this happen before!
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I like the concept of these devices but, as with everything else, there are trade-offs. I will buy another but, keep it in the home in the summer months and put in the vehicle only when heading out on trips. Winter, different ballgame, will not hesitate in keeping it the rig. I think when the temps hit the 80s it will be time to move it to the safety of a cooler environment.
I was thinking the same thing.I have an xp10 as well... maybe Ill throw it in a bag and throw the bag in an ammo can...
I know in (some) industrial settings they store flammables in special metal cabinets to contain any fire arising from spontaneous combustion (e.g., varnish-soaked rags that get hot as the finish cures). A metal ammo can should contain or extinguish any actual combustion by limiting the available oxygen. But it would conduct the heat generated, e.g., melt the interior plastic or carpet. And if the battery explodes, well, who knows if it would be strong enough to contain it or not.
Fair point Moj on the size, but you could throw other gear in the box (like wrenches, sockets, etc.). I would think there are other more compact metal cases out there if one cared to go looking.
Not sockets and wrenches...... fill it with nails.....Maximize the schrapnel opportunities......
#1 - alkaline batteries are arguably more energy-dense than lithium ion batteries. And gasoline is even more energy dense. Density doesn't have anything to do with what makes them sketchy
#2 - putting water on a lithium ion pack is fine. You're thinking of lithium-metal packs, which are generally non-rechargable batteries with a much higher concentration of lithium.
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Well, the energy density is the amount of energy that is chemically stored. So, a high energy density is definitely able to do more damage if it can be liberated in the same amount of time. Much like a discharged battery pack (now chemically more stable) being a lot safer than a fully charged pack. The risk is an internal short inside the pack - all the safety circuitry outside is useless in this case.
An um, yeah, I'd say gasoline is sketchy if the tank is ruptured and a nice hot cat converter is sitting there waiting to ignite things. Not sure why you figure an alkaline battery has higher/similar energy density (per volume) than a li-ion cell, more to the point though is the amps that can be output from a li-ion/poly cell versus a similar size alkaline cell.
I would also not store a li-ion/poly pack in a car in the full heat of summer (i.e. 100 - 120F outside temps). Other than a spark initiated (hydrogen) failure of a lead acid I have yet to see one spontaneously combust/explode.
cheers,
george.
Checked mine a few days ago. Same model/version. Looked ballooned out some, but not split open yet.
I am in the market for a battery jumper and this thread may shift me away from the compact Lithium ion models...it's a bummer since they are so small and have USB ports but I like the idea of keeping it in the rig as a backup so lead-acid it is I think. Thanks for posting your experience.
My experience with the lead acids of various brands including snap-on has been pretty lackluster
A lithium battery fire doesn't need any external oxygen to burn, they will happily burn fully submerged or buried in sand. The electrolyte turns to hydrogen and then that ignites.