DEFA showroom chargers
Chargers for closed and sealed lead-acid batteries: Flooded, calcium, GEL, AGM, EFB as well as partially lithium batteries

DEFA showroom chargersDiscreet at the dealership

With its power-supply function, the charger supplies the consumers during demonstrations, fittings and inspections and gently keeps the battery fully charged.
Our recommendation for charging starter batteries in the car dealership.


  • Perfect for demonstrations

    In the showroom, the battery is particularly challenged: Lighting and electronics are activated every time the doors are opened, but the engine and alternator cannot charge the battery. This charger is designed exactly for this use and keeps all functions active and battery charged without overloading the battery.

    Your advantage: Your vehicles are always ready for test drives and sales without battery replacement.

  • Unobtrusive

    The compact design, detachable cables and clever mountings allow the charger to be placed almost invisibly under the vehicle or even in the engine compartment.

    Your advantage: powerful function without distracting from the object on display.

  • Versatile

    Thanks to the intelligent technology, all lead-acid batteries used in the automotive sector and, with the DEFA ShowroomCharger 50A, also lithium batteries are charged safely and reliably.

    Your advantage: Charge all vehicles in your exhibition or collection with one type of charger.


  • User-friendly and fully automatic high-frequency charger.
  • 7-phase charger with trickle charging over an unlimited period of time as well as analysis before and after charging.
  • Suitable for flooded 12-volt starter batteries including calcium batteries also with 14.7-volt charge voltage, for sealed AGM, GEL, MF and SLA batteries as well as for start-stop batteries, both Enhanced Flooded Batteries (EFB) and AGM batteries.
  • DEFA ShowroomCharger 50A also suitable for lithium batteries.
  • Protection against reverse polarity, contact spark and short circuit. With galvanic isolation.
  • Discreet. Made of black anodised aluminium and noiseless.
  • Invisible placement. Removable cables can be routed through the engine compartment.
  • Charge status readable via LED. Error indication via flashing light.
  • Software update possible via micro USB interface.

Item nr. Volt Ampere Length mm Width mm Height mm


Connection voltage:230 V
Connection current:32 A
DC voltage:12 V
DC current:32 A
Size:219 x 125 x 62 mm
Weight:1 kg
Where can I
buy this?


Connection voltage:230 V
Connection current:50 A
DC voltage:12 V
DC current:50 A
Size:280 x 175 x 85 mm
Weight:3,8 kg
Where can I
buy this?

Charger Knowledge

Continuous discharge test
Why is the charging voltage of the charger important?
In principle, when charging, the electrons within the battery move from one electrode to the other, in the opposite direction to when they draw current, i.e. discharge. If a discharged battery is provided with too high a voltage from the current or voltage …
How does a charger work?
In principle, the charger reverses the chemical process that provides the current output in the charged battery. To do this, it provides the battery with voltage (in volts) and current (in amps). The charge controller in the charger decides how much current …
Chargers in the showroom or car dealership
Showroom chargers are ideal for car dealers. They protect the battery while customers are test-seating the vehicle in the dealership. Consumers such as lights, cockpit displays and multimedia devices require power here during every demonstration, even …
What does that even mean? Charging curve?
Current and voltage during charging can be measured and displayed as a curve over the course of the charging time. Depending on which processes, controls by switch-off (a) or switch-over points (0) are possible with a charger, one speaks of the provided charging characteristics.
Transformer charger versus high-frequency charger
Transformer chargers with a downstream rectifier are relatively inexpensive, but they are large, heavy and less efficient than high-frequency chargers. They allow 1- to 3-step charging methods based on the W-characteristic (W, Wa, WaPuls, W0Wa, WU, WUWa …
Which charger for which battery type?
The most important distinction is that sealed batteries and especially lithium batteries can react extremely to the heat and overpressure during overcharging. A reliable cut-off is particularly important here. Modern fully automatic electronic chargers …
Chargers in a workshop
Especially for workshops, there is another charger that supplies the vehicle with power during diagnoses and software updates on the vehicle electronics. During this phase, the vehicle management system requires a particularly large amount of power and …
Checking the battery step by step
There are many reasons for weakening or failing batteries. An important step in tracking them down is to measure the voltage with a battery tester. Here's how: 1. preparation Disconnect the battery from the vehicle, if possible remove it. Tips on how …
Batteries without vent hose
Only conventional, wet batteries need a vent hose, because they gas strongly during operation. The resulting steam can escape through the openings in the plugs. To prevent the vapour from damaging the vehicle, conventional batteries are vented to the …
Cleanliness pays off
To ensure proper battery function, it makes sense to keep the battery surface clean and dry. Greasy or silicone-containing dirt on the lid can hinder the flow of current. Moisture on the battery can cause a short circuit in the worst case.