That doesn ' t exactly answer his question <| sep |> Honestly mate , invest in a 4 bank changer . For what they cost , they are totally worth it ! I got the nitecore D 4 , and it ' s been an excellent addition to my gear . A lot of people on here can recommend better chargers probably cause the Nitecore is a bit slow . Ideally , if cost is no object , you want a 4 bank charger and 6 new cells . You want to get 3 of one type and three of another , for example 3 samsung 25 r ' s and 3 samsung 30 q ' s . This way you know which 3 are married to each other and dont mix them up , and you will always have a set in your mod while the others are charging . You can keep the batteries you have now for any singledual battery mods you haveacquire . With an external charger like the D 4 , it charges your cells to 4 . 20 v then stops charging automatically , so you can even charge overnight . Charge time depends on the charger and how many cells you have in it at a time . The D 4 charges one cell at 750 mah , and 2 cells at 375 mah .