1. Introducció
This manual provides essential information for the safe and efficient operation of your Powertech MB3904 8 Step Intelligent Lead Acid and Lithium Battery Charger. Please read this manual thoroughly before use and retain it for future reference.
2. Informació de seguretat
Observeu sempre les precaucions de seguretat següents:
- Assegureu-vos que el carregador estigui desconnectat de la font d'alimentació abans de fer o tallar connexions a la bateria.
- Feu servir el carregador només en zones ben ventilades.
- Eviteu carregar bateries congelades.
- No exposeu el carregador a la pluja o a una humitat excessiva.
- Mantenir fora de l'abast dels nens.
- This charger is designed for 6V or 12V Lead Acid or LiFePO4 batteries only. Do not use with other battery types.
3. Contingut del paquet
Verifiqueu que tots els elements siguin presents al paquet:
- Powertech MB3904 8 Step Intelligent Battery Charger Unit
- Bateria Clamp Connectors (Red and Black)
- Connectors de terminal d'anell
- Cable d'alimentació CA
- Manual d'usuari (aquest document)

Image: The Powertech MB3904 battery charger unit shown with its various included accessories, including battery clamps, ring terminals, and the AC power cord.
4. Característiques del producte
The Powertech MB3904 charger offers advanced features for optimal battery maintenance:
- 8-Step Charging Process: Ensures thorough and efficient charging for various battery types.
- Multi-Voltage Compatibilitat: Suitable for both 6V and 12V lead acid and LiFePO4 batteries.
- Protecció integral: Includes overload, short circuit, reverse polarity, safety timer, and wrong battery protection.
- Indicadors LED intuïtius: Clearly display charge status and selected mode.
- Botó de selecció de mode: Allows easy switching between charging modes.

Imatge: Vista de dalt a baix view of the Powertech MB3904 charger, highlighting the LED indicators for charge status and the 'MODE' button for selecting charging programs.
5. Configuració
- Col·locació: Col·loqueu el carregador sobre una superfície estable i plana en una zona ben ventilada, allunyada de la llum solar directa o de fonts de calor.
- Connexió de la bateria: Ensure the battery terminals are clean. Connect the red (+) clamp/ring terminal to the positive (+) battery terminal and the black (-) clamp/ring terminal to the negative (-) battery terminal. Ensure a secure connection.
- Connexió d'alimentació: Plug the AC power cord into a suitable wall outlet. The charger will enter standby mode.
6. Instruccions de funcionament
6.1. Selecting Charging Mode
After connecting the battery and power, press the MODE button to cycle through the available charging programs. The corresponding LED will illuminate to indicate the selected mode:
- 12V 3.8A (Normal): Standard charging for 12V lead acid batteries.
- 12V 3.8A (Cold/AGM): For charging 12V lead acid batteries in cold conditions or AGM batteries.
- 12V 0.9A (Small): For charging smaller 12V lead acid batteries.
- 6V 3.8A: For charging 6V lead acid batteries.
- Lithium (12.8V/12V): For charging 12V LiFePO4 batteries.
- Reparació: A special mode for desulfation of deeply discharged lead acid batteries.
6.2. Procés de càrrega
Once a mode is selected, the charger will automatically begin the 8-step charging process. The progress LEDs (25%, 50%, 75%, 100%) will illuminate sequentially to indicate the battery's charge level. When the 100% LED is solid, the battery is fully charged.
6.3. Desconnectar el carregador
- Desendolleu el cable d'alimentació de CA de la presa de corrent.
- Desconnecteu el negre (-) clamp/ring terminal from the negative (-) battery terminal.
- Desconnecteu el cl vermell (+).amp/ring terminal from the positive (+) battery terminal.
7. Manteniment
- Neteja: Netegeu el carregador casinNetegeu amb un drap suau i sec. No utilitzeu productes de neteja abrasius ni dissolvents.
- Emmagatzematge: Guardeu el carregador en un lloc fresc i sec quan no l'utilitzeu.
- Inspecció del cable: Periodically inspect the power cord and battery cables for any signs of damage. Do not use the charger if cables are damaged.
8. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| El carregador no s'encén. | No hi ha corrent a la presa de corrent; connexió fluixa. | Comproveu la presa de corrent; assegureu-vos que el cable d'alimentació estigui ben connectat. |
| Error LED illuminated. | Reverse polarity; short circuit; wrong battery type. | Check battery connections for correct polarity; inspect cables for shorts; ensure battery type matches selected mode. |
| La bateria no es carrega. | Battery deeply discharged/damaged; incorrect mode selected. | Try "Repair" mode for lead acid batteries; test battery with a multimeter; ensure correct charging mode is selected. |
9. Especificacions
- Model: MB3904
- Entrada Voltage: 220-240V AC, 50/60Hz
- Vol. De sortidatage: 6V / 12V CC
- Corrent de càrrega: 0.9A/3.8A
- Tipus de bateries: Lead Acid (WET, MF, CA, EFB, GEL, AGM), LiFePO4
- Protecció: Overload, Short Circuit, Reverse Polarity, Safety Timer, Wrong Battery
- Dimensions: Aproximadament 20.4 x 7.4 x 4.8 cm
- Pes: Aproximadament 534 g
- Compliment: CE
10. Garantia i Suport
This Powertech product is covered by a standard manufacturer's warranty. For specific warranty terms and conditions, please refer to the warranty card included with your purchase or contact your retailer.
For technical support or service inquiries, please contact Jaycar Electronics customer service or visit their official weblloc web. Conserveu el comprovant de compra per a reclamacions de garantia.
Jaycar Electronics Weblloc: www.jaycar.com.au





