1. Introduction
This user manual provides comprehensive instructions for the safe and efficient operation, maintenance, and troubleshooting of your PCHH 12V 24V Car Battery Charger. Please read this manual thoroughly before using the product and retain it for future reference.
The PCHH BC-108 is a heavy-duty 12V/24V car battery charger and maintainer designed for various lead-acid battery types, including AGM, GEL, Wet/Flooded, EFB, Calcium, MF, and deep-cycle batteries. It features automatic voltage detection, multiple charging modes, and built-in safety protections.
2. Safety Instructions
Always observe the following safety precautions to prevent personal injury or damage to the product or battery:
- Read all instructions: Before using the charger, read all instructions and cautionary markings on the charger, the battery, and the product using the battery.
- Ventilation: Ensure adequate ventilation when charging. Batteries can produce explosive gases.
- Eye Protection: Always wear eye protection and protective clothing when working with batteries.
- Avoid Sparks: Do not smoke or allow a spark or flame in the vicinity of the battery or engine.
- Disconnect Power: Disconnect the AC power cord from the outlet before making or breaking the connections to the battery.
- Proper Connection: Connect the battery charger output clips to the battery terminals as instructed in this manual. Ensure correct polarity.
- Indoor Use: This charger is designed for indoor use. Do not expose to rain or snow.
- Children: Keep out of reach of children.
- Damaged Unit: Do not operate the charger if it has received a sharp blow, been dropped, or otherwise damaged.
- Non-rechargeable Batteries: Do not attempt to charge non-rechargeable batteries.
3. Product Overview
The PCHH 12V/24V Car Battery Charger (Model BC-108) is a robust and versatile device. Key features include:
- Heavy Duty Construction: Made with copper coil, metal, and ABS casing, weighing 12.2 lb for durability.
- Automatic Voltage Detection: Automatically detects 12V and 24V batteries.
- Multiple Charging Modes: Fast charge, trickle charge, repair mode, auto shut-off, and maintain mode.
- LCD Digital Display: Easy-to-read display showing charging percentage, current, and voltage.
- Winter Mode: Provides a more complete charge in cold weather.
- Safety Protections: Built-in protection system against reverse polarity, short circuit, overcharge, over-heat, over-voltage, and over-current.
- Versatile Application: Suitable for cars, trucks, motorcycles, boats, marines, RVs, lawn mowers, and electrolysis projects.

Figure 3.1: Front view of the PCHH 12V/24V Car Battery Charger with its digital display and control panel.
4. Setup
Before connecting the charger, ensure the area is well-ventilated and free from flammable materials.
- Prepare the Battery: If necessary, clean the battery terminals. Ensure the battery is a lead-acid type (AGM, GEL, Wet/Flooded, EFB, Calcium, MF, deep-cycle). This charger is not compatible with lithium batteries.
- Connect the Red Clamp: Attach the red positive (+) clamp to the positive (+) terminal of the battery.
- Connect the Black Clamp: Attach the black negative (-) clamp to the negative (-) terminal of the battery. If connecting to a vehicle, connect the black clamp to a non-painted metal part of the vehicle chassis or engine block, away from the battery and fuel line.
- Plug into AC Outlet: Plug the charger's AC power cord into a standard 100V-130V AC electrical outlet.

Figure 4.1: Visual guide for connecting the battery charger: 1. Connect to battery, 2. Plug into AC outlet, 3. Select charging rates, 4. Select charging mode.
5. Operating Modes
The charger features an intelligent LCD display and multiple operating modes for optimal battery care.

Figure 5.1: The PCHH charger in operation, demonstrating its ability to repair dead batteries.
5.1 Charging Rates (Fast/Slow)
The charger automatically detects 12V and 24V batteries and offers two charging rates:
- Fast Charge: For quicker charging of larger batteries (12V 0-15A, 24V 0-10A).
- Slow Charge (Trickle Charge): For smaller batteries or maintaining charge (12V 0-7.5A, 24V 0-5A).

Figure 5.2: The charger's auto-detect feature and selectable fast/slow charging rates for different vehicle types.
5.2 Repair Mode
The repair mode is designed to revive dead batteries (above 3V) and restore old, drained, stratified, and sulfated battery performance. This mode uses pulse current technology to recondition the battery.
5.3 Auto Off / Maintain Mode
- Auto Off Mode: The charger automatically stops charging when the battery is fully charged (typically at 95%), preventing overcharging.
- Maintain Mode: After full charge, this mode uses a pulse current to keep the battery at optimal charge, extending its life.

Figure 5.3: The charger's Auto Off and Maintain modes help extend battery life by preventing overcharging and providing continuous optimal charge.
5.4 Winter Mode
Designed for all climates, the special winter mode provides a more complete charge to the battery in cold weather, ensuring a stronger engine start. This mode adjusts charging parameters to compensate for lower temperatures.

Figure 5.4: Winter Mode ensures optimal battery charging performance even in cold weather conditions.
6. Product Demonstrations and Usage
Watch the following videos for practical demonstrations and usage tips for your PCHH battery charger.
6.1 Demonstration and How to Use PCHH Battery Charger Maintainer
This video provides a comprehensive demonstration of the PCHH battery charger maintainer, including how to connect it to a battery and select different operating modes. It highlights the ease of use and various functionalities of the device.
6.2 Customer Review: Good Car Battery Charger!
This video features a customer's positive review of the PCHH battery charger, showcasing its effectiveness in charging a car battery. It demonstrates the charger's ability to revive a dead battery and its user-friendly interface.
7. Maintenance
Proper maintenance ensures the longevity and optimal performance of your battery charger.
- Cleaning: Disconnect the charger from power and battery before cleaning. Wipe the casing with a dry cloth. Do not use solvents or abrasive cleaners.
- Storage: Store the charger in a cool, dry place when not in use. Ensure cables are neatly coiled and not kinked.
- Fuse Replacement: The charger has a built-in fuse for protection. If the charger stops working, check the fuse located at the back of the unit. Replace with a fuse of the same type and rating if blown.
- Cable Inspection: Regularly inspect the charging cables and clamps for any damage, fraying, or corrosion. Replace if necessary.
8. Troubleshooting
If you encounter issues with your PCHH battery charger, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Charger not turning on. | No power from AC outlet, blown fuse, or damaged power cord. | Check AC outlet with another device. Inspect and replace fuse if blown. Check power cord for damage. |
| Battery not charging. | Incorrect connection, battery too low (below 3V), or battery is severely damaged. | Ensure clamps are correctly connected to battery terminals (positive to positive, negative to negative). If battery is below 3V, it may not be recoverable by this charger. Consult a professional. |
| Display shows error message. | Reverse polarity, short circuit, or internal fault. | Disconnect immediately. Recheck connections for correct polarity. If error persists, contact customer support. |
| Charger gets hot during use. | Normal operation, but excessive heat may indicate poor ventilation or overload. | Ensure adequate ventilation around the charger. Do not cover the vents. If overheating persists, reduce load or discontinue use. |
9. Specifications
| Feature | Detail |
|---|---|
| Brand | PCHH |
| Model Number | BC-108 |
| Input Voltage | 100V-130V AC (for US market) |
| Output Voltage | 12V / 24V (Auto Detect) |
| Charging Current (12V) | Fast: 0-15A, Slow: 0-7.5A |
| Charging Current (24V) | Fast: 0-10A, Slow: 0-5A |
| Battery Capacity | 4-300AH |
| Compatible Battery Types | Lead-acid (AGM, GEL, Wet/Flooded, EFB, Calcium, MF, Deep-cycle) |
| Dimensions (L x W x H) | 11.4 x 5.8 x 8.6 inches |
| Item Weight | 12.4 pounds |
| Safety Protections | Reverse polarity, short circuit, overcharge, over-heat, over-voltage, over-current |
10. Warranty and Support
The PCHH 12V 24V Car Battery Charger comes with a 3-year warranty for added peace of mind. For technical support, warranty claims, or any inquiries, please contact PCHH customer service through the retailer's platform or visit the official PCHH store on Amazon.
PCHH Amazon Store: Better Choice for Your Batteries