Originally Posted by
nonsense
There is no way in hell that pack is physically large enough to contain 500,000mAh (500 Ah).
In fact the battery pack itself is labelled 238.5WH:
Actually I think the "2" is "-2" on the end of a product number: PB10KPC04-2
Capacity is then 38.5WH, at about 4V that gives about 10,000mAh. Probably not coincidentally if you google that product number you get various chinese pages advertising similar things at 10,000mAh.