Chicago Pneumatic Battery Pack 18V 2.5 Ah Manual De Instrucciones página 7

Battery Pack EN Operation
Consumption mode
To avoid the unwanted discharge of the battery when not in use the battery will switch to deep sleep mode after 1 day
of no use.
The battery will automatically wake-up when inserted on a charger, on a tool or when the latch button is pressed.
If the battery was already on a tool , the one day counter will be triggered when the tool enters the shutdown mode.
In that case the battery need to be removed and inserted again or the latch button pressed for wake-up.
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