Getting low battery message on Arlo Pro camera every time I charge with my phone-type cord

[cjray3203]

New Arlo Pro camera. First time I used it, it was great & lots of fun. After about 12-13 days I got the battery low message, brought it in and charged it (phone type cord). The second time I got the message was about 13 days later. This time, no matter how long I charge it (have charged it for days and using different cords) I keep getting the low battery message. Any suggestions before I return it? 

[TomMac]

More important in charging is the supplied ac adapter....

a normal usb unit will NOT charge the battery. It requires a Qualcomm dual voltage USB adapter that puts out 5v as normal but 9v to charge battery