Fully automatic - for charging and maintenance
There is no need for any specific knowledge of batteries or
their charging methods; the MULTI US 3300 will take care it. Once switched to
the preferred mode, the charger takes its own readings and then begins to charge
the battery. Once it is finished charging, it will automatically switch to its
maintenance phase - CTEK's patented pulse charging - arguably the most caring
mode for a battery connected for a long time. Simply connect it to solve most
battery problems from the past.
Flexible for different battery needs
The MULTI US 3300 is specifically developed for different needs,
vehicles and batteries. There is a choice between three different modes. The low
current mode (the motorcycle icon) is perfect for smaller 12V batteries such as
motorbikes, lawn mowers, jet skies, snowmobiles, etc. The higher current mode
(the car icon) is for automotive or marine applications with larger batteries.
Finally, an additional winter mode (the snowflake) is specifically aimed at
charging and maintenance in cold weather. It is also perfectly suited for Optima
Red Top batteries.
Patented desulphation function
Unused batteries lose their power and their life is shortened
through sulphation. It is also more difficult to charge sulfated batteries. The
MULTI US 3300 has a patented method for reconditioning sulfated batteries. The
charger analyzes the state of the battery and, if possible, recovers the battery
and its power.
Compatible with other electronic equipment
Most vehicles today are equipped with sensitive electronic
systems. Unlike less-sophisticated chargers, there is no need to disconnect the
battery; the MULTI US 3300 is specially designed to not damage electronic
Made for all weather conditions and situations
The MULTI US 3300 is prepared to charge and maintain, no matter
the weather, temperature or situation. The MULTI US 3300 is extremely robust and
water and dust resistant (IP65 classification). The MULTI US 3300 is certified
for use between -4°F and +122°F. In order to make things easier and more
convenient, the Comfort Connect (eyelet terminals) can be permanently connected
to the vehicle's battery.
Designed for safety
All CTEK models are designed to consider the safety of the user.
They are spark free, making the connection much easier and safer considering the
gases batteries normally produce. The MULTI US 3300 is also protected from
reverse-polarity connections and is short-circuit proof. A red light on the
charger will simply indicate that the charging cannot begin until the user has
connected the charger correctly.
4 Step Charging Process
|Input voltage AC
|Back current drain*
||<1Ah per month|
||-4°F to +122°F, output power is reduced automatically at higher
|Type of charger
||4 step, fully automatic switch mode with pulse maintenance|
|Type of batteries
||12V lead-acid batteries (Wet, MF, AGM, GEL and Ca)|
||6½ x 2 x 1½ inches|
||IP65 (splash and dust proof)|
*) Back current drain is what drains the battery if the charger
is connected without the power cord connected.
**) Ripple describes the
quality of the current and voltage. A high current ripple heats the battery and
shortens its life. A linear charger has a current ripple of 70-400% which is
much larger than the maximum 5% for a modern sealed battery. High voltage ripple
could harm other equipment that is connected to the battery. MULTI US 3300
delivers voltage and current with very low ripple. The battery has a long
service life and there is no risk of damage to other electronic devices
connected to the battery.