1. Sarrera
The ANCEL BT521 is a versatile 4-in-1 automotive tool designed for comprehensive 12V lead-acid battery management. It functions as a battery tester, charger, repairer, and maintainer, providing essential diagnostics and charging capabilities for various vehicle types. This manual provides detailed instructions for safe and effective use of your BT521 device.
2. Ezaugarri nagusiak
- 4-en-1 funtzionaltasuna: Integrates battery testing, charging, repair, and maintenance modes.
- Advanced Battery Testing: Performs health tests, cranking tests, and alternator tests for 12V lead-acid batteries (100-2000 CCA), providing State of Health (SOH), State of Charge (SOC), voltage, current, and rating.
- 8-Step Smart Charging: Features a comprehensive charging program including Desulfation, Soft Start, Bulk Charge, Absorption, Analysis, Repair, Float, and Pulse Maintenance to optimize battery power and extend lifespan.
- Battery Repair Function: Helps revive older batteries and enhance lifespan by reversing sulfation.
- Automatic Unattended Mode: Monitors and maintains battery charge with up to 50% power consumption, ideal for long-term storage.
- Segurtasun Babesak: Includes reverse polarity, overcurrent, overvoltage, short circuit, and overheat protection. Features smart control and temperature compensation for safe operation in various climates.
- Erabiltzaileentzako interfazea: Equipped with an easy-to-read LCD display and intuitive button controls.
- Diseinu iraunkorra: Features 2024 new copper clamps for ultra-stable contact and improved accuracy, and comes with a portable protective case.
3. Zer dago kutxan
- 1 x ANCEL BT521 Battery Tester
- 1 x Erabiltzailearen eskuliburua
- 1 x Portable Protective Case

Image: The ANCEL BT521 device with its cables and clamps, user manual, and protective case, displayed alongside its retail packaging.
4. Konfigurazioa
- Konektatu Clamps: Erantsi cl gorriaamp to the positive (+) terminal of the 12V lead-acid battery and the black clamp to the negative (-) terminal. Ensure a secure connection for accurate readings and safe operation.
- Piztu: The BT521 device will automatically power on once connected to a battery with sufficient charge. If the battery is completely dead, connect the power plug to an AC outlet.
- Hasierako pantaila: The main menu will appear on the LCD display, allowing you to select the desired function.

Image: The ANCEL BT521 connected to a car battery, showing the clampterminalei lotuta daude.
5. Funtzionamendu-argibideak
Navigate the menu using the Up/Down arrow buttons and confirm selections with the OK button. The Fn button can be used for a one-button quick charge.
5.1. Bateria proba
- Menu nagusian, hautatu "Battery Test".
- Choose the battery type (e.g., Regular Flooded, AGM Flat Plate, AGM Spiral, GEL, EFB).
- Select the standard (e.g., CCA, IEC, EN, DIN, CA, BCI).
- Enter the battery's rated CCA (Cold Cranking Amps).
- The tester will display results including SOH (State of Health), SOC (State of Charge), voltage, current, and a recommendation (e.g., Good Battery, Good-Recharge, Replace).

Image: The ANCEL BT521 display showing detailed results of a battery test, including health, charge, internal resistance, and CCA.
5.2. Abiarazteko proba
- Menu nagusian, hautatu "Cranking Test".
- Follow the on-screen prompts to turn off the engine and then start it when instructed.
- The device will analyze the cranking performance and display results such as cranking time, maximum/minimum voltage, and a status (e.g., Cranking Normal, Cranking Low).
5.3. Alternator Test (Charging Test)
- Menu nagusian, hautatu "Charging Test".
- Follow the on-screen prompts to increase engine RPM to 2500 r/min and hold for 10 seconds, then press ENTER.
- The tester will perform a ripple test and loaded/unloaded voltage test, displaying the charging status (e.g., Charging Normal, Charging High, Voltage Low).
5.4. Quick Charging / Standard Charging
- Menu nagusian, hautatu "Quick Charging" or "Standard Charging".
- The device will automatically initiate the 8-step smart charging process. The display will show the current step, SOC, voltage, eta egungoa.
- The charging process includes Desulfation, Soft Start, Bulk Charge, Absorption, Analysis, Repair, Float, and Pulse Maintenance.

Image: The ANCEL BT521 connected to a power outlet and a battery, showing the 8-step smart charging process on its display.
5.5. Maintainer Mode
- Menu nagusian, hautatu "Maintainer Mode".
- This mode automatically monitors the battery and provides trickle charging to keep the charge in the optimal range, extending battery life during long periods of inactivity.

Image: The ANCEL BT521 in maintainer mode, connected to a battery, illustrating automatic maintenance and repair.
5.6. Berriroview Datuak
Menu nagusian, hautatu "Review Data" to view past test results and charging records.
5.7. Konfigurazioa
Menu nagusian, hautatu "Setup" to configure device settings such as language or unit preferences.
Bideoa: Amaiera batview of the ANCEL BT521's 4-in-1 Smart Battery Charger & Tester functions, demonstrating its capabilities.
Video: A detailed guide on how to use the ANCEL BT521 with a 12V lead-acid battery, covering various testing and charging modes.
6. Mantentzea
- Garbiketa: Garbitu gailua zapi leun eta lehor batekin. Ez erabili garbitzaile edo disolbatzaile urratzailerik.
- Biltegiratzea: Store the BT521 in its protective case in a cool, dry place when not in use.
- Kableen zainketa: Ensure cables and clamps are free from damage before each use. Replace if any wear or tear is observed.
- Firmware eguneraketak: Periodically check the ANCEL official webwebgunea eskuragarri dauden firmware eguneratzeetarako, errendimendu eta bateragarritasun optimoa bermatzeko.

Image: The ANCEL BT521 highlighting its comprehensive safety features, including protection against various electrical faults and environmental conditions.
7. Arazoak
- Gailua ez da pizten: Ziurtatu clamps are securely connected to the battery terminals. If the battery is completely discharged, connect the device to an AC power source.
- "Fault" Indicator On: Check for reverse polarity connection (red clamp to negative, black to positive). The device has reverse polarity protection. Also, check for short circuits or other battery issues.
- Probaren emaitza zehaztugabeak: Ensure battery terminals are clean and connections are solid. Verify that the correct battery type and CCA rating are entered.
- Charging Not Progressing: Check the battery's health. If the battery is severely damaged or sulfated, the repair mode may need to be initiated first. Ensure the power plug is securely connected to an AC outlet.
- Tenperatura arazoak: The device features automatic temperature compensation. If operating in extreme temperatures, allow the device to adjust.

Image: The ANCEL BT521 illustrating its temperature compensation feature, which adjusts charging based on ambient temperature to prevent over or under-charging.
8. Zehaztapenak
- Marka: ANCEL
- Eredua: BT521
- Energia iturria: Bateriaz elikatua / Korronte alternoz elikatua
- Estiloa: 4 IN 1 12V Battery Tester
- Kolorea: Beltza
- Neurriak (L x W x H): 11.22 x 7.09 x 3.74 hazbete
- Pisua: 2.4 kilo
- Neurketa mota: Voltmetroa
- Bateriaren bateragarritasuna: 12V Lead-Acid Batteries (Regular Flooded, AGM Flat Plate/Spiral, EFB, GEL)
- CCA barrutia: 100-2000 CCA
- Kargatzen Amparoa: 5A, 3A, 1A (selectable)
9. Bermea eta Laguntza
For warranty information, technical support, or service inquiries, please refer to the documentation included with your product or visit the official ANCEL webgunea. Gorde erosketa-agiria berme-erreklamazioetarako.





