I recently bought a 2010 Anakin removable blade and Darth maul 2007 from ebay for $50. Only issue with them is the battery packs. Anakin one has minor leakage which I'm confident can be cleaned up. Does anyone know an easy way to open the battery pack up? I'll need to re-solder one of the wires back on too. Can someone let me know if they've done this?