newbie here. have quickly discovered that filling blanks is probably the way to go for better flavor and higher nic. i have experimented a little with refilling my prefilleds using condom and direct dripping, and i seem to get them overfilled easily, which of course is a big nasty mess. i am using the premium 111 (which, best i can tell, is a kr808 automatic), and i am now concerned about how easily i might eff up my batteries. thoughts, advice, reassurance? how easy is it to ruin one? am i not refilling properly?
also, is a sealed battery better on a rainy day, for example?

also, is a sealed battery better on a rainy day, for example?