Thank you for your question. Yes, the DC18SF 18V LXT® Lithium-Ion 4-Port Charger monitors each battery and actively controls the current, voltage and temperature for faster charging and longer battery life.
"Makita Team": I don't think you understand the question.... By law the charger has to have a UL label that would indicate something like 120v. ____W. The number before the W indicates how many watts it draws. Why that matters is that it indicates what other tools it can share a circuit with without tripping a circuit breaker
Thank you for your question. The DC18SF 18V LXT® Lithium-Ion 4-Port Charger charges 2 Makita LXT® Lithium-Ion batteries at a time.
The Makita 18-Volt Lithium-Ion Rapid Optimum 4-Port Charger (DC18SF) is a sequential charger and does not charge four batteries all at once. For example, the DC18SF will charge two 18V LXT 3.0Ah batteries in approximately 60 minutes, and four 18V LXT 3.0Ah batteries in approximately 120 minutes. For increased efficiency, you could consider the Makita 18V Lithium-Ion Dual Port Rapid Optimum Charger (model DC18RD). The DC18RD will charge two 18V batteries simultaneously (example: two 18V LXT 3.0Ah batteries in only 30 minutes).
The B9000 is a pod style battery, and this is for the newer slide style Li-Ion batteries. Makita does make an adaptor for the pod batteries for their chargers, but I don't think it'd be worth your time to get 4 adaptors. You'd be better off picking up another pod-style charger