Einführung
The TrustFire TR-020 is a versatile 4-slot universal battery charger designed for a wide range of rechargeable batteries, including Li-Ion/IMR/INR/ICR and Ni-Mh (NiCd) types. It features QC3.0 fast charging via a Type-C USB port and can also function as a power bank. The integrated STN HD display provides real-time charging status for each slot.
This manual provides detailed instructions for the safe and efficient operation, maintenance, and troubleshooting of your TrustFire TR-020 charger.
Produkt überview

This image shows the TrustFire TR-020 universal battery charger with various battery types inserted into its four independent charging slots. The clear STN HD display is visible, showing charging parameters such as voltage and capacity for each slot. A USB-C cable is connected to the charger's input port.

This diagram highlights the key components of the TrustFire TR-020 charger. It points out the 'V' and 'O' buttons for display control, the STN HD liquid crystal display, the USB output port for power bank functionality, and the Type-C input port for charging the unit itself. The four charging slots are also clearly visible.
Hauptmerkmale:
- Universelle Kompatibilität: Supports a wide range of Li-Ion/IMR/INR/ICR batteries (e.g., 10440 to 32650) and Ni-Mh (NiCd) batteries (AA, AAA, C, D).
- 4 unabhängige Spielautomaten: Each slot features an intelligent and independent circuit, allowing for simultaneous charging of different battery types and sizes.
- QC3.0 Fast Charging: Type-C input supports 18W fast charging (9V QC2.0/QC3.0).
- STN HD Display: Provides real-time charging status including voltage, capacity, temperature, and charging time for each slot.
- Powerbank-Funktion: USB output (5V-2.1A, max 2.4A) allows the charger to be used as a power bank to charge small devices when disconnected from power.
- Mehrere Sicherheitsmaßnahmen: Includes overcharge, deep discharge, anti-reverse, short circuit, and high-temperature protection. Features 0V activation for discharged batteries.
Einrichtung und erste Verwendung
- Auspacken: Carefully remove the TrustFire TR-020 charger, USB cable, and user manual from the packaging.
- Stromanschluss: Connect the provided USB cable to the Type-C input port on the charger. Connect the other end of the USB cable to a compatible USB power adapter (e.g., a QC3.0 fast charger for optimal performance) or a computer USB port. The display will illuminate.
- Einlegen der Batterie: Insert compatible rechargeable batteries into the charging slots. Ensure correct polarity (+/-) as indicated on the charger. The charger will automatically detect the battery type and begin charging.
- Erste Anzeigeprüfung: Upon inserting a battery, the STN HD display will show the current status of that slot, including battery type, voltage und Ladestrom.
Bedienungsanleitung
Akkus laden:
- Automatische Erkennung: The charger automatically detects the battery type (Li-Ion, Ni-Mh, etc.) and selects the appropriate charging voltage und aktuell.
- Überwachung des Ladestatus: The STN HD display shows real-time information for each slot. Press the 'V' button to cycle through different display parameters (voltage, capacity, temperature, charging time) for the selected slot. Press the 'O' button to select the slot you wish to view.
- Ladeabschluss: The display will indicate when a battery is fully charged. Remove batteries promptly once charging is complete.
Verwendung als Powerbank:
The USB output function is only activated when the power supply to the charger is disconnected and a charged battery is inserted into one of the slots.
- Stromversorgung trennen: Ensure the Type-C input cable is disconnected from the charger.
- Geladenen Akku einlegen: Place a fully charged Li-Ion battery (e.g., 18650, 26650) into any slot.
- Gerät verbinden: Connect your smartphone, torch, or other small USB-powered device to the USB output port on the side of the charger. The charger will begin supplying power.

This image illustrates the TrustFire TR-020's capability to function as a power bank. The USB output port is clearly visible, and icons suggest its use for charging a smartphone or other small electronic devices, making it convenient for on-the-go power.
Wartung
- Reinigung: Reinigen Sie die Außenseite des Ladegeräts mit einem weichen, trockenen Tuch. Verwenden Sie keine Scheuermittel oder Lösungsmittel.
- Lagerung: Bewahren Sie das Ladegerät bei Nichtgebrauch an einem kühlen, trockenen Ort fern von direkter Sonneneinstrahlung und extremen Temperaturen auf.
- Feuchtigkeit vermeiden: Setzen Sie das Ladegerät weder Wasser noch hoher Luftfeuchtigkeit aus.
- Regelmäßige Inspektion: Periodically check the USB cable and charger for any signs of damage.
Fehlerbehebung
| Problem | Mögliche Ursache | Lösung |
|---|---|---|
| Das Ladegerät lässt sich nicht einschalten. | Keine Stromversorgung; defektes Kabel; defekter Adapter. | Stellen Sie sicher, dass das USB-Kabel fest angeschlossen ist. Versuchen Sie es mit einem anderen USB-Anschluss oder Netzteil. |
| Akku lädt nicht. | Incorrect battery insertion; non-rechargeable battery; battery too deeply discharged; faulty battery. | Check battery polarity. Ensure battery is rechargeable. The charger has 0V activation for deeply discharged batteries, but some may be beyond recovery. Try a different battery. |
| Das Display zeigt die falschen Informationen an. | Display mode not selected; temporary glitch. | Press 'V' button to cycle through display modes. Disconnect and reconnect power to reset. |
| Die Powerbank-Funktion funktioniert nicht. | Charger still connected to power input; insufficient battery charge; non-Li-Ion battery. | Disconnect the Type-C input cable. Ensure a sufficiently charged Li-Ion battery is inserted. |
Technische Daten

Dieses Bild bietet einen klaren Überblickview of the TrustFire TR-020 charger's technical specifications, including input/output voltages and currents, compatible battery types, and physical dimensions. It serves as a quick reference for the charger's capabilities.
- Eingangslautstärketage: Gleichstrom 5 V/9 V
- Ausgangsvolumentage: 4.35 V / 4.2 V / 3.6 V / 1.45 V
- Ausgangsstrom:
- 1.5A x 2 (1st/4th slot when 2nd/3rd slot vacant)
- 1A x 4 (each slot charging at the same time)
- 0.5A x 4 (for 1.2V batteries)
- USB-Ausgang: 5V - 2.1A (Max 2.4A)
- Kompatible Batterietypen: Li-Ion/IMR/INR/ICR (10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14350, 14430, 14500, 14650, 16340, 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 22500, 22650, 25500, 26650, 20700, 21700, 32650); Ni-Mh (NiCd) (AA, AAA, AAAA, C, D)
- Arbeitstemperatur: -10°C bis 55°C
- Produktgröße: 120 x 49 x 152 mm
- Nettogewicht: 235g
Garantie und Support
For warranty information and technical support, please refer to the official TrustFire website or contact your retailer. Please retain your purchase receipt for warranty claims.
Wichtiger Hinweis: This charger is not approved for charging non-rechargeable batteries.





