I didn't receive an instruction manual and im very new to vaping, but here is my issue: I had my ego t for about a week now, and up until yesterday it has been acting just fine. 75% of the time I am using it as normal, the rest of the time I am using it on the usb passthru. I let it charge all night while I sleep. Yesterday was the first day i used it all day up until the fire button started blinking, which I believe means low battery. Ever since then, I can get anywhere from 15-45 minutes of heavy vaping before the blue light starts blinking and there is a noticeable decline in vaping performance. No flavor, weaker vapor production and throat hit. So I charge it again, and the red indicator light goes out within 20 minutes, which I assume is an indication that the battery is supposed to be charged. BTW, I am using Boge LRs and occasionally a CE4. Anybody know what could be causing this? Am I doing any charging no-nos? Is this my error or just a bad battery? Thanks.