Question about RAVPower Rp-Pb055

This item has 135 Wh (Wh = Ah x V) when fully charged. Discharge it to about 50% before the flight and it has well under 100 Wh. I recently asked Air Berlin about this anyway. Here is the answer:
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"A powerbank is considered a spare battery. If the hand luggage does not exceed the dimensions 55x40x23cm/ 8 kg, it can be carried in the hand luggage. The following information applies to the transport of lithium batteries.
≤ 100 Wh (2 g) : Small lithium batteries and cells for mobile phones, cameras, watches, portable music players as well as for most laptops, etc... in the device, can be carried in cabin baggage as well as in checked baggage. There is no quantity limit as long as they are under 100 Wh.
> 100 to160 Wh: Medium sized lithium batteries and cells including some extended life batteries for laptops, and batteries for professional audio-visual applications in the device, can only be carried in cabin baggage. A maximum of 2 spare batteries per passenger in cabin baggage only.
In this case, the batteries must be secured against short-circuiting (e.g. in original packaging, individually in plastic bags/protective pouches, insulating the terminals by taping over them).

Requirements regarding the transport of batteries:
_ A short circuit must be prevented by insulating the exposed terminals.
_ In the case of appliances, the battery may have to be removed and the exposed terminals protected.
_ Accidental activation must be prevented if the batteries cannot be removed.
can be removed"
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So you can take the RAV Powerbank with you without any problems. However, as a precaution, discharge it before the flight and tape the terminals shut. I bought the large Hyperion battery protection bag from Galaxus. The powerbank fits nicely in it. The bag is IATA-approved for batteries up to 100 Wh.

In 99% of cases, the nominal voltage of the battery cells (Li-Ion; 3.7V) is used for calculation. Thus, this article has a capacity of 99.9 Wh.

Momentary note from Swiss ...
Spare batteries for portable electronic devices / rechargeable battery (powerbank):
All spare batteries only allowed in hand luggage.
Batteries with 100 Wh to 160 Wh power, maximum 2 pieces and only after advance notification.
Batteries over 160 Wh generally prohibited