Please check with your airline, as each has different regulations as to what they will accept.
Generally your Ecoxgear battery is smaller than what is in your Smartphone.
Here are the specs they will want to know:
The batteries are
IATA UN 38.3 certified
The battery size will vary depending upon your speaker, but in general, they range from:
500 mAh Li-ion to 3200 mAh Li-ion
the ECOPEBBLE powerbank has a larger battery for charging purposes:
- 10,400 mAh Battery Charger