I recently got 2 Ultrafire 14500 3.6v batts and a charger from madvapes for a wetbox I brought from a member on here (Thanks again, TJ). I charged both of them up, put on a lr 510 carto, and vaped away. Was doing ok, but was what I was used to with lr on my ego. Once that batt got low on power, I switched out. The second batt was amazing! loads of rich warm vapor. When I got home, I put both of them in the charger, putting a sharpie mark on the awesome batt. When I woke up today, I put the non sharpie batt in the wetbox. It was ok, but not great. Put the sharpie batt in and bam, great vape again. Anyone else experience this with there batts?