Number and type of cells: 6 × AA (also called LR6)
Recommended primary cell type: Alkaline
Recommended rechargeable cell type: NiMH
A user-replaceable fuse protects against reversing the polarity of the
Battery life with alkaline cells: ca. 8.5 hours
Battery life with rechargeable batteries:
ca. 3 hours (700 mAh NiCd)
ca. 5 hours (1100 mAh NiMH)
ca. 5.5 hours (1300 mAh NiMH)
ca. 7 hours (1600 mAh NiMH)
ca. 12 hours (3400 mAh gelled lead-acid battery (external))
A voltage indicator displays the battery voltage within the unit.
A warning LED will begin to blink if the voltage falls beneath a critical
value (time remaining at that point with 1300 mAh rechargeable
batteries: at least 10 minutes).
The unit will shut itself off automatically to help prevent damage from
draining the batteries completely. The unit resumes operation only
after the on/off switch is used.