~HB - Battery Status

Overview

The ~HB command returns battery status information for battery-powered printers, including current battery voltage, head voltage under load, and battery temperature. Used for monitoring battery health and preventing unexpected shutdowns.

Syntax

~HB

Parameters

None

Description

• Returns battery voltage readings
• Shows printhead voltage under load
• Includes battery temperature
• Useful for preventive maintenance
• Processed immediately

Return Format

<STX>bb.bb,hh.hh,bt<ETX><CR><LF>

Response Fields

• bb.bb = Current battery voltage (quarter-volt resolution)
• hh.hh = Head voltage under load (quarter-volt resolution)
• bt = Battery temperature

Examples

Request Battery Status

~HB

Returns: <STX>12.50,11.75,25<ETX><CR><LF>

Interpretation:

• Battery voltage: 12.50 volts
• Head voltage: 11.75 volts
• Temperature: 25°C

Low Battery

~HB

Returns: <STX>10.75,10.25,30<ETX><CR><LF>

Indicates low battery condition.

Battery Maintenance

Healthy Battery

• Voltage: 12-15 volts
• Head voltage: 11-14 volts
• Temperature: 15-35°C

Warning Signs

• Voltage drops below 11 volts
• Temperature exceeds 40°C
• Rapid voltage drop

Usage Notes

• Only for battery-powered printer models
• Check periodically for battery health
• Monitor before long print jobs
• Plan battery replacement ahead
• Temperature affects battery life
• Useful for fleet management

Related Commands

• ~WC - Print Configuration Label
• ~JB - Reset Battery Dead

See Also

• Print Configuration Label (~WC)