From Boeing land today...
WASHINGTON (Reuters) - U.S. safety investigators on Sunday ruled out excess voltage as the cause of a battery fire last month on a Boeing Co 787 Dreamliner jet operated by Japan Airlines Co (JAL) and said they were expanding the probe to look at the battery's charger and the jet's auxiliary power unit.
Dreamliner probe widens after excess battery voltage ruled out - Yahoo! News
Thats all fine, but one of the batteries was in the front EE Bay, not at the APU...