Question: are oral b toothbrush chargers interchangeable?
Answer: Can I use the oral b 3000 with a 110-220 charger from an older model oral b toothbrush? ... The handles are not interchangeable with these charging bases. The older bases were for NiCad batteries and the newer bases are for either NiMH or Li-Po. You can't mix and match the chargers and battery chemistry.