[miatapaul]

If it uses Lithium cells it might not be very good, as they do not like heat. Boats, especially some of the lockers with little ventilation get quite hot. I worry about laptop batteries as they can get warm in the cabin, and once they start they burn and burn fast and hot. That is why Dell had to recall thousands of them for getting hot and catching fire in air conditioned offices. I have used a cheap jump pack for cars for years, it finally gave up the ghost after several years and hundreds of uses. I think I paid $30 for it.