I had two imren 3200mah 18650 40 amp and all of a sudden they charger would say they are fully charged and when I put then in my mod "kbox 200" it will say only 3 to 4 bars out of 5 so I bought a new set of batteries thinkingit might fix the problem but they do it to, so yesterday I bought a new digi d4 charger thinking it had to be the charger that was messed up and it still won't fully charge the batteries? What should I do?