Quite furious, so I contacted the SAV RAVpower who responded very quickly and sent me a new unit! I plug my phone and miracle is finally recognized! I did not thoroughly tested but in 20 minutes he recharged about 10/15% battery despite the sun is shy today.
For my vacation longer need to hurry to find a hotel and charge my phone! Same for hiking, picnics and small trips in weekend! Its small size will easily in any bag and become essential for me this summer. Ability to charge 2 devices, which seems logical to me that the saw recharging is slower than a charger. I think to put a battery in case I need to charge my phone at night. Some complain of lack of space in the small pouch, indeed I do not think a tablet can return, but security put a protective cover on your phone.