Having forgotten my charger before going on holiday, I pulled this cheaper 6x compatible charger that also charge on cigarette lighter. It should just be compatible with all of these products to be a little vigilant (unplug after use, monitor the temperature of the battery time to time, check that the load will stop when the battery is full).
In short, good product, that does not heat, which stops at the end of charge and has very correct finish. Worked with my original and compatible batteries (Phottix).