Sentinel Battery Sensor is an intelligent device, learning about the battery it is connected to. The sensor is easy to install or retro-fit to battery banks. After a few power cycles it can measure State of Health and accurately predict the lifetime of the battery.
Mobile phones are best examples of how misleading the 'remaining available power' can be when batteries are exhausted. Similar case could be potentially dangerous on smaller boats without redundant power sources.
Like the Hub, Sentinel Battery Sensor can be paired with a Boat Monitor by using the Sentinel app.