Monteverde PowerBank Pen & Charger

400mAh... hmm the only thing i can think of that would charge from that is like a smartwatch. The sony smartwatch 3 might be a good product to pair with this since it has a 420 mAh battery.

teaspoon -> bucket yes sureee

Thanks for the extra detail Jonas but I think it'd be better if the functionality of the battery was also reviewed. That is IMHO the prime function of this. I am having difficulty accepting that this is more than a gimmick due to it's size. Note I do NOT mean that it is poorly/cheaply made, it just seems that it's like being handed a teaspoon when you need to fill a bucket.