Hello Guys somebadoy can help me ? I just put a brand new TELLO to charge but nothing happen I put in the USB in my computer but the blue light doesn´t flash ?  What I am doing wrong  ?

could it be a bad battery?, connections ok?, try usb ac adaptor.

Sounds like a dud battery

Can you try to charge Tello using other dedicated charger.. may be a charger with higher mA rating.

Sorry for this unpleasant experience. Could you kindly check whether the issue is fixed after the charger’s charger/charging cable is replaced if the issue is fixed after the battery is removed and inserted without connecting to a charger?  Can it be powered on?
Look forward to your reply and have a nice day!