So far I’ve been disappointed with the charger too. After much discussion with blue Eddie tech-support my configuration is as follows. I have two b300K batteries. When is connected to the charger two. In order to provide the reverse charge capability. The other is connected to the AC 300. The charger two does not recognize the B300K connected to it. Initially it did but now it doesn’t. After one of the firmware upgrades I suspect. I have confirmed the battery is fully charged but according to the blue Eddie app it has zero charge and is not charging at all. I’m also disappointed that, with all the fan fair about the charger too, they neglected to put support for the AC 300 in the app as a setup option. I consider the AC300 a far superior product over the Apex 300. The lack of support for something only a year old is beginning to concern me for any future investment. Not ready for prime time is my take on the charger 2. I wish they had distributed to real testers rather than a bunch of influencers.