Can I check the remaining battery of Beacon?

Question

I already checked the specification of below beacons:

• Eddystone Protocol Specification
• AltBeacon Protocol Specification v1.0
• ibeacon Payload

AFAIK, we can not get the remaining battery of Beacon by advertising. For example, I can not check that my Estimote eddystone that use "Panasonic CR2450 battery" have 50% of battery.

Is it true? If not, how can I get this information?

Answer 1

While the iBeacon transmission does not include a battery level field, AltBeacon has one extra data byte in its advertisement that many manufacturers, including Radius Networks, use to store the percentage battery level on battery-powered beacons.

For Eddystone, there is an Eddystone-TLM frame that includes a voltage field that also indicates the battery level on battery-powered beacons.