Dexcom transmitter battery is low :(

Hi all,

So, this happened today:


Now I have to contact AT and ask for a new transmitter I was really hoping this one would last until G5 comes out, but I guess that was a bit of a wishful thinking... I was suspecting the battery was getting weaker, since I've been having a bit more "out of range" errors recently.
According to the manual, after this alert appears, the battery may die as soon as within a week! Anyone has any experience on how long I actually have before it happens?

I got this transmitter in April 2014. So it lasted 15 months...

I had a second low battery alert on Thursday morning - I thought the alert only shows up once? And later that day my receiver started showing out of range, even though it was less than 1 metre from the sensor. After 3 hours I assumed the battery died completely so removed the sensor.
Tested the transmitter with a multimeter yesterday and it seems to be dead.

My replacement should be delivered on Monday. Should have been here on Friday but the courier company mixed stuff up. So a weekend without a cgm for me!