Oceanscience Q-Boat 1800D User Manual - page 16
Q-Boat 1800
Page 16
8/26/2011
8. Do NOT overcharge the batteries. Batteries should be supervised while charging and should
not be left unattended. Ensure the batteries are disconnected as soon as charging is
complete.
9. Under rare circumstances, the charger may finish the charging cycle prematurely before the
battery has been fully charged. Verify that the battery has been fully charged by measuring
the voltages across each of the 3 discharge terminals. All voltages should be roughly equal
and should be higher than the battery’s rated voltage of 12V. Also, factor in the duration of
chare when deciding whether to trust the battery charger’s automatic cutoff. For example, a
30Amp-hour capacity battery, if fully depleted, should require a minimum of 5.55 hours to
charge if each of the 3 charge ports are set to charge at a rate of 1.8A [30 Amp-hours / (3*
1.8A) = 5.55 hours]. In practice, it takes batteries about 50% longer to charge than the time
spent discharging them. If you suspect that the charging cycle may have terminated
prematurely, disconnect and then re-connect the batteries and restart the charge process.
10. Once each month, the propulsion battery(s) should be fully discharged before recharging to
avoid memory problems that may be caused by repeatedly charging partially discharged
batteries.
(Fig. 5.9) Rigid Bridle
connection detail
(Fig. 5.10) Rigid Bridle loose
parts
(Fig. 5.9) Disconnect all Molex
connectors
(Fig. 5.10) Tamiya connectors
and identifying labels.
(Fig. 5.11) Connect three
charging adapters to battery
charger ports
(Fig. 5.12) Connect greenish-yellow
terminals to the adapters on the
charger
(Fig. 5.13) Connect the charger to
the outlet and turn on front
power switch to begin charge