I have a question. I bought a trustfire tr-001 charger. Only the left side turns green after charging. The right side stays red. Its been this way since I bought it. Since I usually only charge one batt at a time. I really didnt pay that close attention to it. I used it for 18650's. Now Im using it for 14500's. Had the batt in the right side for about 6 hours and it never turned green. Is this normal?