The TBB Trident BS series provides intelligent battery chargers that are suitable for charging all types of batteries. Wet, gel and AGM batteries as well as Li-ion batteries, such as the popular LiFePO4 batteries, can be charged perfectly. The DIP switch allows the perfect charging characteristic to be selected for each type of battery.



Thanks to the high-frequency technology used, the charger is compact and can also be installed or stored in small compartments or cabinets. The charger is insulated against direct and alternating current and is equipped with overvoltage protection, an automatic multi-stage charging function and many other safety functions.

The BS battery charger offers an unbeatable number of additional functions and protective devices in this price segment. These include, among other things

Automatic multi-stage charging curve

The BS series battery charger has an automatic charging function with up to five stages and delivers nominal current for around 75% of the charging time. This function guarantees complete, fast and safe charging of your battery.

Integrated timer

When the charge drops to a certain nominal value or the charging time preset on the timer has expired, the BS series battery charger switches from absorption charging to trickle charging.

Recovery charge

The BS series battery charger is designed for a permanent connection to the battery. To prevent possible sulphation during long-term trickle charging, the charger automatically switches to recovery charging mode after 14 days.

Simultaneous charging of several batteries is possible with the -3 models.

Do you want to charge several batteries at the same time? The BS1225-3, BS1240-3, 2412-3, 2420-3 models can charge up to three batteries at the same time.



The total current (10 A, 25 A or 40 A) depends on the model type. If several batteries are connected to the charger, the total current is divided between the individual batteries according to the degree of discharge.

Insulated outputs

The outputs are electrically isolated from each other. This prevents current flows between the connections and a return current from the battery to the battery charger.

Particularly quiet design

The charger is particularly quiet. If the charging current falls below a certain value, the charger's fan is switched off. If the temperature inside the device rises again, the fan is automatically switched on again.

Simultaneous operation as charger and mains adapter

The intelligent BS series battery charger can be used simultaneously as a DC mains adapter and battery charger. The device software is programmed to prevent overcharging of the battery even under such circumstances.

Protective coating of the circuit boards

To protect against moisture and corrosion, the circuit boards installed in the BS series battery charger have a protective coating.

Use as a power supply unit

The BS series battery charger can also be used as a power supply unit by setting the DIP switch accordingly. In this case, however, a constant voltage is supplied. In this mode, the device is not suitable for charging rechargeable batteries. The battery type and battery temperature are ignored in this mode. The temperature sensor does not initiate voltage equalization in this mode, but the overtemperature protection continues to function. In this mode, the charger can deliver net DC voltages of 13.5 V (12 V models) or 27 V (24 V models).

Integrated protective functions

The BS series battery charger has the following protective functions:
1) Shutdown in the event of a short circuit at the output;
2) Electronic protection against incorrect polarity;
3) Shutdown if the battery voltage is too high;
4) Power reduction if the charger temperature is too high, maintaining the temperature at a balanced level;
5) Shutdown if the battery temperature is too high, automatic restart after sufficient cooling down

Automatic temperature compensation



The standard equipment of the BS series battery charger also includes a battery temperature sensor.


If this sensor is connected to the battery, the charger can automatically regulate the charging current to the connected battery more precisely using appropriate temperature compensation.

Operation at high ambient temperatures

The BS series battery charger is designed for full-load operation at temperatures of up to 40 °C.

Scope of delivery:

In addition to the charger, the packaging contains
1) the operating instructions
2) the temperature sensor