The Petzl ACCU 2 ULTRA battery is the smaller of the rechargeable lithium ion batteries for the Petzl Ultra. Weighing 160g the ACCU 2 battery will power the Ultra for 2 hours on full power (170m beam) or 38 hours on economic. The ACCU 2 battery takes 3.5 hours to fully charge and has a built in charge gauge.
When not in use the ACCU 2 battery can be left plugged into the charger, which automatically switches off when charging is complete so the battery is always ready for use.
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