So I've got these 2 different DJI chargers, one with an output of 17.4 V/3.3 A and a bigger one with an output of 17.5 V/5.7 A. Having quite a string of bad luck with Phantoms, I'm trying to be cautious, and am trying to decide which one to use, and I'm thinking the smaller one may have been from a 4k and I'm trying to use a Pro. And as I've recently found out, trying to swap parts between the two models can really cause problems. So I check my batteries and they all say 15.2 V/4480 mAh (which is milliamps per hour, which further confuses me as I'm not sure how that relates to just "regular" amps). So neither charger actually fits the batteries, or the controller for that matter (7.4 V/6000 mAh). I understand that you don't want an adapter with a voltage that's too high or a current that's too low, as either may cause the device it's charging to overheat. Both chargers have too high of a voltage, so I guess that doesn't matter? However the smaller one has a current that's too low while the bigger one doesn't (assuming that 4480 mAh is 4.48 A?). But then again, neither one has a current high enough for the controller. Since this is all official DJI stuff, I'd like to think it'll just be fine either way, but as I subtly brought up earlier, I'm a little bitter and paranoid with this company. Do you think I should use one over the other? Do you think I can use them both just fine and be able to charge two batteries at the same time?