I just received a Iniu Portable Charger with a high rating on Consumer Reports. However, there is a warning label on the box “lithium ion batteries forbidden for transport on passenger aircraft”!
This would defeat the purpose of using it when traveling to Paris! Advice please!
https://www.faa.gov/hazmat/packsafe/resources/airline-passengers-batteries
Batteries cannot go into your checked luggage, they may go into your carry-on luggage.
Check FAA regs here: https://www.faa.gov/hazmat/packsafe/portable-electronic-devices-with-batteries
There are also TSA regulations for spare lithium batteries https://www.tsa.gov/travel/security-screening/whatcanibring/items/lithium-batteries-100-watt-hours-or-less-device
You'll need to check regulations for your return flight separately.
If it's a portable charger for your phone, it's extremely likely to be perfectly fine to carry. Obviously, don't put lithium ion batteries in your checked luggage, but normal sized "power banks" meant for cell phones will be allowed in your carry-on or personal item bag.
To be certain, look in your documentation for a listing of the battery size/capacity. It will list a number with "mAh," probably 8,000-15,000 mAh. The limit is generally around 27,000 mAh.
What did you buy?
A 'charger' or a 'power bank'?
A "wireless charger" is just a coil inside a plastic phone holder. There is no batttery or electronics in it. It is powered by a USB connection. No problem with putting it in a checked bag. If your device combines the battery with the wireless charger coil, it then has a lithium battery, and as was said, can't go in checked luggage. Personally, I would just use the normal USB cable to charge my phone and save the space and weight of the coil thing. I normally have a larger USB battery pack, a smaller one, and two cell phones in my carryon. I have to pull all that stuff out at TSA, but it's no big deal.