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Battery operation:
The HL batteries come in two slightly different variants.
Battery Type 1
The first battery-type is always on, and when the button is pressed, it just shows current state of the
battery—the more lights illuminated, the more full the battery is.
Battery Type 2
The second type, while physically identical, the button on this one is a multi-function button. The button
is used to turn the battery on and off, as well as to indicate the status of the battery.
With the battery off, pressing the button will turn the battery on, this indicated by a single green LED.
Pressing and holding this button for a three seconds will turn the battery off.
With the battery already on, briefly pressing the button will show the battery status.
If the battery is left switched on, but unused, it will automatically turn off after a while.
