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BT-620 Manual
Page 25
BT-620-9800 Rev B
about 8 hours. For continuous operation, operate the unit with the battery charger
attached. Charge the battery before storing the BT-620. Storing a discharged battery
will degrade its performance.
6.1.
Battery Replacement
You can purchase an optional battery charging cable and replacement battery pack to
extend battery operating time. Use the charging cable with the included battery charger
to charge the replacement battery while you operate the BT-620 under battery power.
6.1.1. To charge the replacement battery pack
1. Connect the battery charging cable to the battery charger
2. Connect the replacement battery to the charging cable
3. Connect the battery charger to the AC outlet
4. The battery charger LED will be Red during charging Phase 1 (constant current).
It will turn Orange during Phase 2 (constant voltage). At this point, the battery is
80-95% charged. The LED will turn Green 4 hours after Phase 2 begins.
Note: The battery pack will generally be fully charged 3 hours after charging
begins. At this point, the LED will still be Orange.
6.1.2. To replace the battery pack
1. Turn BT-620 power off
2. Remove all rear panel connections (battery charger, serial communication).
3. Tip BT-620 back on rear panel feet
(Photo #1 below)
.
4. Loosen screw holding battery door
(#2)
.
5. Remove the battery door
(#3 & #4)
.
6. Remove the battery pack
(#5)
.
7. Disconnect battery pack
(#6)
.
8. Connect replacement battery pack
(#6)
.
9. Tuck the wires in carefully as you replace the battery pack
(#5 & #4)
.
10. Replace the battery door
(#3)
.
11. Tighten the battery door screw
(#2)
.
12. Return the BT-620 to the upright position.
(#1)
(#2)
(#3)