[Feature request]: Expose batteryType as property

[bakman2]

Is your feature request related to a problem? Please describe

No.

Describe the solution you'd like

device topics report their battery types, eg:

{
        "battery": 35,
        "device":
        {
            "applicationVersion": 4,
            "batteryType": "CR2450",   <-------
            "dateCode": "20200526",
            "friendlyName": "rooms/kleine_kamer/sensor/temperature",
            "hardwareVersion": 1,
            "ieeeAddr": "0x00124b001b783e4d",
            "manufacturerID": 0,
            "manufacturerName": "eWeLink",
            "model": "SNZB-02",
            "networkAddress": 25656,
            "powerSource": "Battery",
            "type": "EndDevice",
            "zclVersion": 1
        },
        "humidity": 49.62,
        "linkquality": 80,
        "temperature": 19.01,
        "voltage": 2800
    }

{
        "action": "off",
        "battery": 74,
        "device":
        {
            "applicationVersion": 33,
            "batteryType": "CR2032",  <----
            "dateCode": "20190723",
            "friendlyName": "rooms/woonkamer/switch/ikea dimmer 1",
            "hardwareVersion": 1,
            "ieeeAddr": "0xb4e3f9fffeacb1d1",
            "manufacturerID": 4476,
            "manufacturerName": "IKEA of Sweden",
            "model": "E1743",
            "networkAddress": 2410,
            "powerSource": "Battery",
            "softwareBuildID": "2.2.010",
            "stackVersion": 98,
            "type": "EndDevice",
            "zclVersion": 3
        },
        "linkquality": 178,
        "update":
        {
            "state": "available"
        }
    }

and/or

{
        "battery": 35,
        "batteryType": "CR2450", <-------
        "device":
        {
            "applicationVersion": 4,
            "batteryType": "CR2450",   <-------
            "dateCode": "20200526",
            "friendlyName": "rooms/kleine_kamer/sensor/temperature",
            "hardwareVersion": 1,
            "ieeeAddr": "0x00124b001b783e4d",
            "manufacturerID": 0,
            "manufacturerName": "eWeLink",
            "model": "SNZB-02",
            "networkAddress": 25656,
            "powerSource": "Battery",
            "type": "EndDevice",
            "zclVersion": 1
        },
        "humidity": 49.62,
        "linkquality": 80,
        "temperature": 19.01,
        "voltage": 2800
    }

Describe alternatives you've considered

None, as none are available.

Additional context

Currently I need to manually keep track of the number and type of batteries - and as the number of devices usually increase (not decrease) it is getting harder to keep track.

This feature would provide the ability to query all devices at once and create/maintain an inventory of batteries, ie; what/when/which to buy.

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