ORIGINAL: RC-FIEND
If lightning by some far fetched reason strikes the battery it could explode and catch fire. Try to locate a tree pruner or climber and pay him or her to get your plane down, GL
Give me a break. If lightning hits the thing, the last thing to worry about is the battery. Get serious. If lightning hits it, bring the marshmallows and weenies.

That tree will be history and the battery vaporized.