Battery Level
The battery level indicator shows the current level of the battery. There are 4 battery level symbols, indicating Battery FULL, 2/3 full, 1/3 full, and Battery empty. If you have plugged in the optional mains power supply then the battery symbol will not display. As the 2B uses a standard alkaline 9V PP3 battery, a brand new battery should show full*, however the unit will continue to operate with ‘flat’ batteries with a reduced output. This is designed to allow you to make the most out of a battery.
If your 2B starts to reset itself when higher power levels are selected, then this is generally a sign the battery might need replacing.
The battery level display will update whenever a control is adjusted. Due to processor constraints the battery symbol does not display in the Audio Modes.
*Because of the variations in battery manufacturing technology, a brand new battery may not necessarily display a full battery symbol.