Which charging cable do I need for the Bellboy?

There are two different charging cables available for the Bellboy, namely the 6mm pogopin charging cable. The only difference between these 2 charging cables is the length of the cable:

Charging cable Bellboy 1.5m
Charging cable Bellboy 0.6m
Recommended adapter (plug) in combination with these cables is 5V, 2A.