Originally Posted by S Keith

Note that modules with the 4th digit of "J" and "K" are far more likely to leak than others. Occasionally will see F-I leak as well, but J and K are far more common. 3rd digit of 7 or higher with a 4th digit of "I" are likely to leak almost as much as J or K.

Cycling cells with an RC charger increases their likelihood of leaking exponentially unless you know what you're doing. Additionally, you are far more likely to experience P3011 to P3027 errors with "cycled" modules.