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Qoltec 52490 – intelligent microprocessor charger 12V 8A / 24V 4A with repair function
Qoltec 52490 is an intelligent microprocessor-controlled battery charger designed for charging 12V and 24V lead-acid batteries. It is suitable for AGM, GEL, EFB, WET, SLA and DRY lead-acid batteries used in cars, motorcycles, trucks, campers, boats, lawnmowers, agricultural vehicles and quads.
The charger uses a 3-stage charging process, adapts charging parameters to the current battery condition and automatically switches off after charging, helping protect the battery from overcharging and extending its service life.
Key features
Intelligent microprocessor control
The charger automatically adjusts charging voltage and current to the battery condition, ensuring safe and efficient charging.
3-stage charging mode
Uses CC, CV and Float stages to charge the battery efficiently and then maintain it safely after reaching full charge.
Advanced repair function
The repair mode can help recover deeply discharged or sulphated batteries that have not been used for a long time.
Clear LCD display
The built-in display allows you to monitor the battery status, voltage, current and selected charging mode in real time.
Battery compatibility
Supported battery types
The Qoltec 52490 charger is designed for maintenance-free lead-acid batteries:
- AGM batteries
- GEL batteries
- EFB batteries
- WET batteries
- SLA batteries
- DRY lead-acid batteries
Supported battery voltage
The charger supports 12V and 24V batteries.
Recommended battery capacity
Car batteries: 30Ah – 150Ah
Motorcycle batteries: 6Ah – 30Ah
Important: this charger is not intended for charging LiFePO4 batteries.
Charging process and repair mode
The charger uses intelligent 3-stage microprocessor-controlled charging, adapting voltage and current to the current battery state.
- CC stage: charging up to approximately 80% of battery capacity with constant maximum current
- CV stage: constant voltage charging from 14.1V DC to 14.8V DC while gradually reducing current
- Float stage: maintenance charging, reducing the voltage to approximately 13.0V DC – 13.8V DC
Repair function: the recovery mode lasts approximately 16 hours and is intended for batteries with very low voltage or sulphation caused by long-term non-use.
Power and connection
The charger is powered from a standard 220–240V AC mains supply and provides 12V / 24V output with 8A / 4A charging current. Connection is simple with red and black crocodile clips.
Easy connection: connect the red clamp to the positive battery terminal and the black clamp to the negative terminal, then select the appropriate operating mode.
Safety and protection
- Reverse polarity protection
- Overvoltage protection
- Overcharging protection
- Short-circuit protection
- Overcurrent protection
- Overheating protection
- Low voltage protection
- Automatic shutdown after charging
- Built-in fan for cooling
Technical specifications
- Manufacturer: Qoltec
- Product code: 52490
- Power: 130W
- Input voltage: 220–240V AC
- Output voltage: 12V / 24V
- Output current: 8A / 4A
- Charging type: 3-stage charging mode
- Battery charging voltage: 14.6–14.8V
- Charging time: depending on battery capacity, approx. 1–12 hours
- Efficiency: >85%
- Cooling system: 1 × fan
- Display: LCD
- Connector: red and black crocodile terminals
- Cable length: 0.50 m
- Power cord length: 1 m
- Operating temperature: -30°C ~ +50°C
- Dimensions: 95 × 170 × 67 mm
- Net weight: 0.590 kg
- Package contents: 1 × charger, 1 × warranty card, 1 × operating instructions
- EAN code: 5901878524900
- Certificate: CE
- Warranty: 24 months
Smart charging and battery recovery in one device
Qoltec 52490 is a practical choice for maintaining and charging 12V and 24V lead-acid batteries. With microprocessor control, LCD display, safety protections and repair function, it is suitable for everyday use in vehicles, workshops, garages and service applications.
| Safety & Compliance | |
| EA_SAFETY_WARNINGS | IMPORTANT SAFETY INSTRUCTIONS – BATTERIES AND CHARGERSWARNING Improper use of batteries or chargers may cause overheating, fire, electric shock or injury.- Before use, check that the battery and charger are compatible in voltage, charging voltage, current, connector type and polarity. - Use only chargers suitable for the specific battery type. - If compatibility is uncertain, contact the manufacturer or authorised dealer. - Charge batteries only in a dry, well-ventilated area and away from heat sources, direct sunlight and flammable materials. - Do not cover the battery or charger while charging. - Disconnect the charger from the mains after charging. - Do not use or charge damaged, swollen, leaking, deformed or unusually hot batteries. - Stop charging immediately if the battery becomes excessively hot, emits smoke, leaks or produces an unusual smell. - Do not short-circuit, open, puncture, crush or modify batteries. - Keep batteries and chargers away from water, moisture, fire and excessive heat. - Keep battery terminals away from metal objects that could cause a short circuit. - Keep batteries and chargers out of reach of children. - Do not use damaged chargers, cables, plugs or connectors. - Dispose of used or damaged batteries according to local regulations. Do not dispose of batteries in fire or household waste.Always follow the specific instructions provided by the battery and charger manufacturer. |
| EA_MANUFACTURER_MODEL | 52490 |
| EA_MANUFACTURER | Ntec sp. z.o.o. ul.Chorzowska 44B 44-100 Gliwice Poland Tel.: +48 511 759 623 e-mail: sales@ntec.pl |
| EA_EU_OPERATOR | Ntec sp. z.o.o. ul.Chorzowska 44B 44-100 Gliwice Poland Tel.: +48 511 759 623 e-mail: sales@ntec.pl |
