HP knows that Sony batteries can overheat, catch fire, and potentially explode. But they aren’t worrying’ about any of that. They use Sony battery parts, but aren’t sending any back because they say they make a habit of inspecting those parts thoroughly before including them in their machines.

HP has numbers on its side: Of the nearly 2 million HP laptops out in the market today, a total of zero battery problems have been reported. That echoes the industry totals, which say that only 47 fires have been reported out of a believed total of 230 million laptops worldwide.

Still, factory conditions and lab conditions are not airplane, home, and coffee shop conditions. HP might be playing a dangerous waiting game … or they might not.