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Have tried but not found away on an unrooted Evo. Might have to be rooted for this type of control. That said, the low battery warning is a protective measure to prevent total completion of the battery (which can render Lithium batteries completely useless), but I think the battery itself has a electronic trigger that will shut down the battery to prevent full drainage. Once LI batteries get fully drained, even just once, they won't be rechargeable.