This is what an audience in my live broadcast room mentioned to me last week (he is also an anchor, and even has more fans than me). Since there is no IV battery in the official GT6, we can only use the charging lapotron crystal of IC2 to store the power of the IV. although the battery itself can be used normally, when these batteries are placed in the battery box, the energy display cover and energy sensor cannot sense the power inside the battery, It can only sense the cache of the battery box itself, which may lead to some automation problems.
Ah yeah, IC2 Stuff doesn’t work that way indeed. I only have very basic Compat with its Energy Items by now. I will keep the Issue open, maybe I will solve it eventually.