Standalone Battery sensor?
### Current Situation

I am setting up this [plugin](https://github.com/ThisIsQasim/homebridge-apc-snmp) (forked from an abandoned repo) for my UPS to report remaining battery backup. 

It works great for the most part except that I can not setup any automations based on the battery level or charging status. When I try to disable all other accesory types and just keep the BatteryService the Home app says the type of accessory is not supported. 

I have also seen [some people](https://www.reddit.com/r/HomeKit/comments/jh1nok/anyway_to_either_remove_the_low_battery/) have a battery icon in Home status. 

So my question is can we setup a standalone battery sensor and get a battery status to run then run automations on?

### Logs

```markdown
Nothing particular in the logs. Even with debug enabled.
```


### Configuration

```json
{
            "accessory": "ups",
            "name": "UPS",
            "community": "private",
            "address": "10.0.0.191",
            "enable_non_graceful": false,
            "enable_graceful": false,
            "enable_alarm": false,
            "enable_selftest": false,
            "enable_temp": false,
            "enable_battery": true
        }
```


### Environment

- OS: Alpine Linux (3.15.4)
- Software: 1.4.1
- Node: v16.15


### Process Supervisor

Docker (Mention image name in `Additional Context`)

### Additional Context

using the latest docker image `oznu/homebridge:latest`