Haven't flown my P4P Obsidian in quite some and noticed one of my four batteries is completely dead/non-responsive. Looking for a replacement but discovering Obsidian 5870mAh batteries are tough -- if not impossible -- to come by. New seems to be out of the question, so does anyone have a source for good-quality, low charge-cycle replacements? The P4P battery seems to be composed of a main "box" containing the internals, and then encased in a "shell" with the lights, release buttons, etc. Short of actually getting my hands on an Obsidian battery, would it be possible to purchase a new white P4P batt and swap-out the "shell" so it would be a white battery encased in the Obsidian housing? That way, once installed, the bird would still look 100% Obsidian Anyone successfully do that?