POWER
The GradeLight can be powered from the Li-ion rechargeable battery or the alkaline battery
pack. It can also be used while charging -- from AC using the included converter, or from 12VDC
using the optional power cable.
Charging
Charge before first use and when the battery symbol indicates low. The Li-ion battery can
be charged in the unit, or removed and charged separately. This allows you to use alkaline
batteries in the spare battery compartment on the job site while the battery is being charged
elsewhere.
The charging circuit is in the battery pack; the converter with cord allows charging from AC.
Maximum charging time is 5 hours; a microcontroller prevents overcharging.
To Charge the Battery:
1) Connect the converter to the charging/power connector on the battery pack.
2) Select the correct power plug adapter for your country and attach to the converter.
Then plug the converter into a 110V or 220V AC outlet. A green LED indicates power; it
is not a charging indicator.
3) Always place the cap back onto the charging connector to protect from dirt.
The laser can be used while charging, but the charging time may increase (up to 9 hours).
• Do not charge in wet environments.
• Do not use the charger with a generator.
Removing the Battery Pack and Using Alkaline Batteries
The rechargeable battery pack can be replaced with the alkaline battery compartment or an-
other Li-ion pack. Turn off the laser. Turn the release screw under the battery pack to remove it.
If using the alkaline battery compartment, insert 4 “D” cells, noting the polarity indications on
the outside of the case.
NOTE: If the laser has been stored for a while, hold the ON button for at least 3
seconds when starting the unit.
4
Purge screw under black decal
inside battery compartment
DO NOT OPEN!
If this screw is removed, the moisture-free
nitrogen purge of the unit will be lost.
Connector for
charging or for
optional 12VDC
power cord
Battery Pack
Release Screw
