Uwell Caliburn A2 Pods are brilliant! As a rule of thumb, they would last the average user around a week before burning out. We recommend not using multiple different flavours in the same pod as this tends to burn the coil out quicker and cause your e-liquid to not taste right either. So have 2 bottles of the same Nic Salt ready as the pods will most probably burn out after 20ml of E-Liquid. Once the pod burns out, fill up a new one, wait 2 mins and vape away.