A:AnswerIn order to change the brush head you hold onto the base with one hand, grab the brush head with the other hand and pull the brush head straight up away from the base. The brush head will disconnect where the beginning of the thin neck meets the larger base.
A:AnswerNo, there is no power light on it at all. You just plug in the charger, set the hand held brush in its place and let it charge. Use it when you need and put back when you are done. Easy.