Inateck BTSP-20 - Safety Warnings and Cautions

VIII. Warning/Caution
Btspeaker should be charged with phone USB chargers and
computer USB port only! Chargers for other devices such as tablets
should not be used. USB chargers that provide more than 1A while
chargers (ipad charger etc.) could severely damage Btspeaker’s
battery and potentially cause malfunctions.