U cant charge with other characters any more. If urs isnt charged u can get in with someone that has theirs charged ...make sure u get a shot on every major during the fight and urs will be charged and ready to open the chest by the end of the fight. If u dont kno anyone with a charged one then ur gona have to visit the dreadnought once a day for a week to get the taken major that spawns from those little taken grenades throughout. If anyone needs to charge theirs up i have one fully charged and will be on after walking dead