4
5) For a positive grounded vehicle (very uncommon): connect the BLACK
NEGATIV clamp / ring connector first to the negative battery terminal,
then connect the RED POSITIVE clamp / ring connector to the positive
battery terminal or vehicle chassis.
6) When disconnecting, disconnect in the reverse sequence, removing
the negative first (or positive first for positive ground systems).
7) Follow these steps when using 12V accessory plug: keep the vehicle
hood open. Connect the end of the 12V accessory plug to the charger;
insert the 12V accessory plug into the vehicle
’
s 12V outlet. If the
vehicle
’
s ignition key has to be on in order for the 12V outlet to supply /
receive power, turn the key, without starting the engine.
8) A marine (boat) battery must be removed and charged on shore. To
charge it on board requires equipment specially designed for marine
use.
CHARGING MODES
CT-3800 has eight modes: 12V NORM, 12V COLD/AGM, 12V SMALL
NORM, 12V SMALL COLD/AGM, 6V NORM, 12V LITHIUM and 12V REPAIR.
Some charge modes must be held for three (3) seconds or / and pressed
to enter the mode. Do not operate the charger until you confirm the
appropriate charge mode for your battery.
Mode
Battery
Size (Ah)
Explanation
Standby
–––
Not charging or providing any power
(Green LED)
12V NORM
2-120
Charging 12V WET/GEL/MF/EFB batteries
(Green LED)
12V
COLD/AGM
2-120
Charging 12V batteries below 10
℃
(50
℉
)
or 12V AGM battery (Green LED)
12V SMALL
NORM
2-40
Charging 12V WET/GEL/MF/EFB batteries
of small battery size (Green LED)
12V SMALL
COLD/AGM
2-40
Charging 12V batteries below 10
℃
(50
℉
)
or 12V AGM battery of small battery size
(Green LED)
