Reports of burning have emerged.

The Pokéball Mobile Battery Anker is a 10000mAh power bank which was available in Japan from June 2017 to October 2017.

Recent reports of the power bank burning had prompted Nintendo to recall all of them and offer refunds, though no exact cause of the burning was identified.

The Pokémon Company also advises consumer to refrain from using the Pokéball Mobile Battery Anker.

Source: Siliconera