Coincidence?...... or a sign from the heavens?
https://spaceflightnow.com/2016/12/13/japanese-htv-makes-battery-delivery-to-international-space-
station/
"But the items aboard Kounotori 6 that will get the most attention from the station crew are six lithium-ion batteries bolted to a pallet nestled inside the HTV’s unpressurized cargo section."