1 6

CrystalGleam Glassware

ANCEL BT521 3-in-1 Car Battery Charger, Tester and Maintainer for 12V Lead-Acid Batteries, 5A Smart Trickle Charger and Desulfator with Overcharge Protection & Temperature Compensation, LCD Display

ANCEL BT521 3-in-1 Car Battery Charger, Tester and Maintainer for 12V Lead-Acid Batteries, 5A Smart Trickle Charger and Desulfator with Overcharge Protection & Temperature Compensation, LCD Display

$89.24 USD
$89.24 USD $89.24 USD
Sale Sold out
Shipping calculated at checkout.

From the brand

  2. Battery Monitor/Tester

  3. Two/Four/Full System Scanner

  4. Specific OBD2 Scanner

  5. Automotive Smoke Machine

  6. Heavy Duty Truck Scanner

  7. ancel
  8. ancel
  9. ancel

  10. Our Vision

    We strive to make friends with our customers with excellent products and quality services, and to be the company most trusted by our customers.

    Our Mission

    To provide professional, efficient and high quality automotive diagnostic products so that every car owner around the world can enjoy a better life made possible by technology.

    Our Value

    The company constantly strives for product quality, technology, design and sustainability and adheres to the spirit of people-oriented and innovative efforts to make great contributions in the field of automotive technology.

Product description

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.

ancel battery charger

Merchant Video

Why buy three separate devices for charging, testing, and maintenance?

ANCEL BT521 breaks the mold by combining all three functions into one. It’s a powerful battery charger, a precise tester, and a professional-grade maintainer—delivering 3X the value at just a fraction of the cost.

Most products on the market offer only one function, forcing you to spend more and clutter your toolbox. The BT521 changes that: its smart chip delivers 99.6% accurate diagnostics in just 3 seconds (voltage, CCA, and health status). Its 8-stage smart charging ensures fast, safe charging without damage. And its unique desulfation repair revives deeply discharged batteries down to 2V, extending lifespan up to 2–3X.

With 5 layers of safety protection and IP65 waterproofing, it works reliably in any condition. Plug-and-play operation and a clear LCD screen make it simple for anyone to use.

Choose BT521 = One device instead of three + Save hundreds of dollars + Get longer-lasting batteries.

Dead battery after storage? Trouble starting in cold weather? Short trips draining your charge? BT521 tackles these nightmares head-on! It restores power, checks battery health, prevent failures and extend battery life,saving time and avoiding costly repairs

Compatible with all 12V batteries, including lead-acid, AGM, GEL, EFB, and Flooded types, making it ideal for cars, trucks, motorcycles, and more. It ensures safe, efficient operation, extends battery life, improves performance, and provides reliable, all-in-one battery management for diverse needs

  • Yes, Unattended Mode intelligently manages charging based on your battery level to maintain optimal health and longevity.

  • Supports all 12V lead-acid battery types, including WET, AGM, GEL, EFB, and so on. It is suitable for cars, motorcycles, trucks, boats, ATVs, and more.

  • Absolutely. The BT521 features an 8-stage smart charging process with built-in temperature compensation, overheat protection and reverse polarity protection, along with an IP65 water/dust-resistant rating.

  • For a mildly sulfated or inactive battery, recovery may be possible. However, a fully dead or internally shorted battery requires replacement. Always perform the built-in SOH (State of Health) check first to determine if repair is worthwhile.

  • Yes! The BT521 is designed with a user-friendly interface, a clear LCD display, and guided menus.Even beginners can operate it confidently within minutes.

Compare ANCEL Battery Monitoring/Testing Devices

Customer Reviews
4.2 out of 5 stars 76
4.3 out of 5 stars 1,059
4.3 out of 5 stars 1,059
4.5 out of 5 stars 3,391
4.3 out of 5 stars 140
Price
$89.24 $30.99 $47.59 $33.99 $127.49
Testing Voltage
12V 12V 6V/12V/24V 12V 6V/12V/24V
Cranking Test
Charging Test
Battery Test
Measure Standard
CCA/BCI/CA/MCA/JIS/DIN/More — — CCA/BCI/CA/MCA/JIS/DIN/More CCA/BCI/CA/MCA/JIS/DIN/More
Battery Types
FLOODED/AGM/EFB/GEL/More FLOODED/AGM/EFB/GEL/More FLOODED/AGM/EFB/GEL/More FLOODED/AGM/EFB/GEL/More FLOODED/AGM/EFB/GEL/More
Print Data
Advanced Functions
Charger,Repair, Maintainer Bluetooth,Real-time Monitoring Bluetooth,Real-time Monitoring Quick Test,Ripple Test TEMP,Quick and Ripple Test
Language
English/French/German/Spanish English English/French/German/Spanish English/French/German/Spanish 10+ languages
View full details