not for complete monitoring

The first time we have a baby Angel Care 401, many drawbacks, but a decisive advantage: volume (I know ... wants and does not have any, we have already)
After several attempts we have now tried a device with video, in the opinion that if we already hear nothing, then in any case see something ...... works well, depending on the orientation of the camera, but no good for a complete monitoring, then the battery lasts only about 5 hours (is probably worse). The sound is well transmitted to the part, some with unacceptable breaks ............ as I said, many do not want the complete monitoring, then super device ....... unfortunately for us