I just received this and verified that it works and read the instructions. This is a genuine Makita product. This will charge 2 batteries in series at the same time if you use all ports. Ports 1 and 2 are not loaded at the same time, ports 3 and 4 are not loaded at the same time, port 1, then 2, port 3, then 4 or vice versa are loaded. Just know that it charges 4 batteries 2 at the same time and then switches to the other 2 ports. Just wanted to try and explain this to people who might think this is going to pull 4 batteries at once like me. The wall mounts are set at 16" on the center studs, I thought that was a nice touch. Too many products rely on drywall for construction.
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