Yea I don't think anything at all is going on in the plug end of that ac/dc charger.. it's a big charger for a single battery. Also, I've had trouble with mine in the 12v form if the power was split at the power port. Couldn't have 3 things plugged in at once or the charger would error out. Other than that, it's fine. I've had a standard m18/m12 charger going off a HF inverter without issue for quite a while. At $39 (for the 400 watt) the inverter is a cheaper option.
In other news, I'm on a bit of an extended leave from my regular job. Hopefully only temporary, but time will tell. Anyway - started working for another company 2 weeks ago. Place is MUCH smaller, but they are growing. Had a company meeting Friday, and one of the owners called me into his office to ask how thinks we're going, and to say they basically want me to pick out all their future tools and equipment for them as far as "line work" is concerned. Lol.. I told him I'm REALLY good at spending other people's money. my first Milwaukee list was left on his desk today. They even gave me a company credit card too, which can be dangerous. lol.. Not sure if he realizes what he's in for.