pengenalan
The ANCEL BT521 is a versatile automotive tool designed to manage and assess vehicle batteries. It integrates the functions of a battery charger, a battery tester, and a battery maintainer into a single unit. This manual provides detailed instructions for the safe and effective use of your BT521 device, helping you maintain battery health, prevent unexpected issues, and extend battery lifespan.
This bundle also includes a protective case designed to securely store the BT521 unit and its accessories.
Maklumat Keselamatan Penting
Please read and understand all safety warnings and instructions before operating this device. Failure to do so may result in electric shock, fire, serious injury, or property damage.
- Sentiasa pakai pelindung mata dan pakaian pelindung apabila bekerja dengan bateri.
- Pastikan kawasan kerja mempunyai pengudaraan yang baik.
- Jauhkan kanak-kanak dan orang yang tidak dibenarkan dari kawasan kerja.
- Never smoke or allow sparks or flames in the vicinity of a battery.
- Avoid dropping metal tools onto the battery. This could cause a spark or short-circuit the battery or other electrical parts, which may cause an explosion.
- If battery acid contacts skin or clothing, wash immediately with soap and water. If acid enters the eye, flush immediately with cold running water for at least 10 minutes and seek medical attention.
- Do not use the charger if cables or clamps rosak.
- Putuskan sambungan kuasa AC sebelum menyambung atau memutuskan sambungan bateriamps.
- This device is designed for 12V lead-acid batteries only. Do not use it for charging dry-cell batteries that are commonly used with home appliances. These batteries may burst and cause injury to persons and damage to property.
Kandungan Pakej
Upon opening your ANCEL BT521 bundle, please verify that all items listed below are present and in good condition:
- ANCEL BT521 3-in-1 Battery Charger, Tester, and Maintainer Unit
- Bateri Clamps (Merah dan Hitam)
- Kabel Kuasa AC
- Sarung Penyimpanan Pelindung
- Manual Pengguna (dokumen ini)

Image: The ANCEL BT521 unit with its included battery clamps, AC power cable, and the protective storage case.
Produk Selesaiview
The ANCEL BT521 features an intuitive interface with a clear display and control buttons for easy operation. Key components include:
- Paparan LCD: Shows menu options, test results, and charging status.
- Butang Kawalan:
- Anak panah atas/bawah: Navigasi melalui pilihan menu.
- Butang OK: Sahkan pemilihan.
- Butang Fn (Fungsi): Access special functions or return to previous menu.
- Return/Back Button: Kembali ke skrin sebelumnya.
- Penunjuk LED:
- 8-STEP Charge: Illuminates during the 8-stage proses pengecasan.
- caj: Menunjukkan pengecasan aktif.
- Kesalahan: Indicates an error or issue.
- Unattended Mode: Indicates the device is in maintenance/trickle charge mode.
- Bateri Clamps: Merah untuk positif (+), Hitam untuk negatif (-).
- Input Kuasa AC: Untuk menyambungkan ke soket dinding standard.

Image: The ANCEL BT521 unit showing its main menu on the LCD display, along with the control buttons and LED indicators.
Persediaan dan Sambungan Awal
- Sediakan Bateri: Ensure the battery terminals are clean and free of corrosion. If necessary, clean them with a wire brush and a baking soda solution.
- Sambungkan Bateri Clamps:
- Sambungkan MERAH positif (+) clamp ke terminal bateri positif (+).
- Sambungkan HITAM negatif (-) clamp ke terminal bateri negatif (-).
- Pastikan sambungan selamat.
- Sambung ke Kuasa: Plug the AC power cable into a standard 120V AC wall outlet. The BT521 unit will power on and display the main menu.
- Vehicle Connection (if applicable): If connecting to a battery still installed in a vehicle, ensure the vehicle's ignition is off and all accessories are turned off. For negative-grounded vehicles, connect the positive clamp to the positive battery terminal first, then the negative clamp to the vehicle chassis away from the battery. For positive-grounded vehicles, reverse the procedure.
Warning: Incorrect polarity connection can damage the device, battery, or vehicle. Always double-check connections before plugging into AC power.
Arahan Operasi
Once connected and powered on, the BT521 will display the main menu. Use the Up/Down arrow buttons to navigate and the OK button to select an option.
1. Mod Pengecasan
The BT521 offers both quick and standard charging options, utilizing an advanced 8-stage charging process to optimize battery health and longevity.
- Pengecasan Pantas: Provides a faster charge for batteries requiring a quicker boost.
- Pengecasan Standard: A more gradual charge suitable for regular battery maintenance and full restoration.
8-stage charging process includes phases such as desulphation, soft start, bulk charge, absorption, analysis, repair mode, float charge, and pulse. This intelligent process ensures efficient charging, reduces battery wear, and can restore depleted or sulfated batteries.

Image: A graphical representation of the ANCEL BT521's 8-step smart charging process, showing voltage and current curves through different stages like desulphation, bulk, absorption, and float.
2. Ujian Bateri
The BT521 can perform various tests to assess the health and performance of your battery and related systems.
- Ujian Bateri: Evaluates the battery's overall health, charge level, internal resistance, and rated Cold Cranking Amps (CCA). The display will show results like "Good Battery," "Bad Battery," or "Replace."
- Ujian Cranking: Measures the battery's ability to deliver current during engine start-up. It assesses the cranking voltage dan masa.
- Ujian Alternator: Checks the vehicle's charging system, including loaded voltage, voltage, dan riak voltage, to ensure the alternator is functioning correctly.

Image: The ANCEL BT521 connected to a car battery, displaying battery test results (Health, Charge, Internal Resistance, Rated CCA) and alternator test results (Loaded, Unloaded, Ripple).
Mod Penyelenggaraan
The Maintenance Mode (also known as trickle charging or unattended mode) is designed to keep your battery in optimal condition, especially during periods of storage or infrequent use. This mode prevents overcharging, self-discharge, and sulfation, which are common causes of battery degradation.
When activated, the BT521 intelligently monitors the battery and delivers a low, consistent charge to maintain its voltage level. This can significantly extend battery life by up to 50%, reduce the frequency of replacements, and lower long-term maintenance costs.
It is recommended to use this mode for vehicles stored for extended periods (e.g., seasonal vehicles, motorcycles, boats) to ensure they are always ready for use. Charging your battery at least once a year, even if not in storage, can improve its performance and longevity.

Image: A visual representation demonstrating how the maintenance mode can improve battery health, showing an increase from 60% to 90% by preventing de-sulphation and restoring vitality.
Menyelesaikan masalah
If you encounter issues while using your ANCEL BT521, please refer to the following common problems and solutions:
| Masalah | Kemungkinan Punca | Penyelesaian |
|---|---|---|
| Peranti tidak dihidupkan. | No AC power, faulty outlet, damaged cable. | Check AC power connection. Test the outlet with another device. Inspect the power cable for damage. |
| "Fault" LED is illuminated. | Incorrect battery connection (reverse polarity), short circuit, battery fault. | Disconnect from AC power. Verify correct clamp connection (Red to +, Black to -). Check battery for severe damage. |
| Bateri tidak dicas. | Buruk clamp connection, battery too deeply discharged, battery fault. | Pastikan clamps are securely attached to clean battery terminals. The battery may be beyond recovery if severely discharged or damaged. |
| Keputusan ujian yang tidak tepat. | Poor connection, incorrect battery type/CCA input. | Pastikan clamps are securely attached. Verify the correct battery type and CCA values are entered into the device if prompted. |
If the problem persists after attempting these solutions, please contact ANCEL customer support for further assistance.
Spesifikasi
- model: ANCEL BT521
- Input Voltage: 100-240V AC, 50/60Hz
- Keluaran Voltage: 12V DC
- Mengecas Arus: 4.3A - 5A (Smart Charging)
- Jenis Bateri: 12V Lead-Acid Batteries (WET, MF, CA, EFB, GEL, AGM)
- Mengecas Stages: 8-Stage Pengecasan Pintar
- Fungsi: Battery Charger, Battery Tester, Battery Maintainer
- Suhu Operasi: 0°C hingga 40°C (32°F hingga 104°F)
- Storage Case Dimensions: Kira-kira 7.9 x 5.5 x 2.4 inci (L x W x H)
Maklumat Waranti
ANCEL products are manufactured to high-quality standards. For specific warranty terms and conditions applicable to your ANCEL BT521, please refer to the warranty card included with your purchase or visit the official ANCEL webtapak. Simpan bukti pembelian anda untuk tuntutan waranti.
Sokongan Pelanggan
If you have any questions, require technical assistance, or need to report an issue with your ANCEL BT521, please contact ANCEL customer support through the following channels:
- Webtapak: Visit the official ANCEL webtapak untuk Soalan Lazim, sumber sokongan dan borang hubungan.
- e-mel: Refer to your product packaging or the ANCEL weblaman web untuk alamat e-mel sokongan khusus.
- telefon: Check the ANCEL website for available phone support numbers.
When contacting support, please have your product model (BT521) and purchase information readily available.





