MaBeee
IoT batteries are created with simple ideas
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Hunter's comment
Introducing “MaBeee”, an IoT battery made with simple ideas.
This battery-shaped product allows you to turn the power On/Off using Bluetooth.
The sensor on your smartphone allow you to control the power On/Off through inclination and sound.
Smartphones can be used to make things more interesting and old products can also be converted to IoT products.
Becasue it is Japanese product, there are many parts in Japanese, but official site supports English so there is not much difficulty inchecking information.
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Hunter: 
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