A:AnswerYes, extra battery packs are available as well as a solar charger. Depending on your sunlight level, you may want to consider the solar charger.
A:AnswerYes, you will hear the chime because the door bell and the chime will work off of the wifi. I bought the hardwired door bell and the chime separate.
A:AnswerIt’s so good you will have to bring in the area you want to monitor!!! It’s real easy to do. I have a long way to the street and it was catching cars going by till I brought in the area I wanted looked at!