Pikachu-themed batteries are being recalled because they overheat

Pikachu can't recharge your phone any more.
The electric-type Pokémon — and the world's most recognisable electric rodent — is now the face of the latest battery-related product recall. 
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The Pokémon Company — which manages the Pokémon franchise — released a warning yesterday on its website (link in Japanese) regarding two of its Pokémon-themed batteries, which were adorned w