SEIVI 18650 Rechargeable Battery and Charger User Manual

1. Introduction

Thank you for choosing the SEIVI 4-pack 3.7V 2800mAh flat-top 18650 rechargeable batteries with a 2-bay charger. This manual provides essential information for the safe and efficient use of your product. Please read it thoroughly before use and retain it for future reference.

Image 1.1: SEIVI 4-pack 18650 batteries and 2-bay charger.

2. Package Contents

Verify that all items are present in your package:

• 4 x SEIVI 3.7V 2800mAh Flat-Top 18650 Rechargeable Batteries
• 1 x SEIVI 2-Bay Universal Battery Charger (Model SW-1)
• 1 x USB-A to USB-C Charging Cable

Image 2.1: Front view of the SEIVI charger and battery packaging.

3. Product Features

• Battery Capacity: Each 18650 battery offers a true 2800mAh capacity, providing over 6 hours of standby time in compatible devices.
• Battery Type: 3.7V flat-top 18650 rechargeable Li-ion batteries. Dimensions: 2.55 inches (65mm) length, 0.71 inches (18mm) diameter.
• Durability: Constructed with A-grade battery cells for stable power delivery and a recyclable life of up to 1200+ cycles.
• Safety Features: Enhanced internal protection against overheating.
• Universal Charger: The 2-bay charger is compatible with 3.7V lithium batteries (e.g., 18650, 14500) and 1.2V Ni-MH/Ni-CD batteries (e.g., AA, AAA).
• Efficient Charging: Charging current up to 1000mAh per slot for Li-ion batteries, allowing a 2800mAh battery to be fully charged in approximately 2.5 hours.
• Charger Design: Features smooth, durable stainless steel rails for battery lengths from 34mm to 75mm. Made from fire-retardant PC material with excellent heat dissipation.

Image 3.1: SEIVI charger with batteries, illustrating capacity and long standby time.

Image 3.2: Comparison of SEIVI charging speed versus other brands, showing 2.5 hours for a 2800mAh battery.

4. Specifications

Image 4.1: Detailed dimensions of the SEIVI 2-bay battery charger.

Image 4.2: SEIVI charger with a table showing wide compatibility for various battery types and sizes.

5. Safety Information

To ensure safe operation and prevent damage, please observe the following precautions:

1. Charge batteries at room temperature (typically 20-25°C / 68-77°F).
2. Always unplug the charger from the power source when not in use.
3. Do not attempt to charge unsuitable battery types or sizes. Using incorrect batteries may cause damage to both the batteries and the charger.
4. Keep the charger away from water, moisture, and excessive dust.
5. Children should only use the charger under adult supervision.
6. Do not disassemble or attempt to repair the charger if it is damaged. Contact customer support for assistance.
7. Do not expose batteries to extreme temperatures, direct sunlight, or fire.
8. Avoid short-circuiting the batteries.
9. Dispose of used batteries according to local regulations.

Image 5.1: Back of the product box showing specifications and caution warnings.

6. Setup and Operating Instructions

6.1 Initial Setup

1. Unpack the charger and batteries from the packaging.
2. Connect the provided USB-A to USB-C cable to the charger's input port.
3. Plug the USB-A end of the cable into a compatible 5V USB power adapter (not included) or a USB port on a computer. The charger's LCD display will illuminate.

6.2 Charging Batteries

1. Insert one or two rechargeable batteries into the charger slots, ensuring correct polarity (+ and - ends match the markings on the charger). The charger's stainless steel rails are adjustable to accommodate different battery lengths.
2. The LCD display will show the charging status for each channel (CH1, CH2) with a battery icon indicating the charge level.
3. When the battery icon on the LCD display shows full, the battery is fully charged. The charger will automatically stop charging to prevent overcharging.
4. Remove the fully charged batteries from the charger.

Image 6.1: SEIVI charger with batteries inserted, showing charging progress on the LCD screen.

6.3 Using the Batteries

These 18650 flat-top batteries are suitable for a wide range of devices. Ensure your device is compatible with 3.7V flat-top 18650 batteries before insertion.

• Insert the charged batteries into your compatible device according to the device's polarity markings.
• Common applications include flashlights, headlamps, remote control cars, video doorbells, outdoor lights, and DIY battery projects.

Image 6.2: Various compatible devices for SEIVI 18650 batteries.

Image 6.3: SEIVI batteries powering various devices like video doorbells, flashlights, and mini fans.

7. Compatibility

The SEIVI 2-bay charger is designed for wide compatibility with various rechargeable battery types and sizes:

• Li-ion Batteries (3.7V): 10440, 18350, 14500, 18490, 17670, 17500, 16340 (RCR123), 18650, 26650, 22650.
• Ni-MH/Ni-CD Batteries (1.2V): AA, AAA, C, SC.

Important Note on 18650 Battery Type: The included SEIVI 18650 batteries are flat-top. Some devices require button-top 18650 batteries. Please verify the required battery type for your device before use.

Image 7.1: Diagram illustrating the difference between flat-top and button-top 18650 batteries, and their dimensions.

Image 7.2: Visual guide to 18650 battery sizes and charger dimensions, emphasizing flat top compatibility.

8. Maintenance

Proper maintenance can extend the lifespan of your batteries and charger:

• Cleaning: Use a dry, soft cloth to clean the charger and battery contacts regularly. Do not use liquid cleaners.
• Storage: Store batteries and charger in a cool, dry place away from direct sunlight and extreme temperatures. For long-term storage, it is recommended to store Li-ion batteries at approximately 50% charge.
• Disposal: Do not dispose of batteries in household waste. Recycle them at an authorized battery recycling facility.

Image 8.1: Environmentally friendly features of SEIVI batteries, including no mercury or cadmium.

9. Troubleshooting

• Charger not turning on: Ensure the USB cable is securely connected to both the charger and a working power source. Try a different USB port or power adapter.
• Battery not charging: Check that the battery is inserted with correct polarity. Ensure the battery type is compatible with the charger. Clean battery contacts and charger terminals.
• Slow charging: Verify that your USB power adapter provides sufficient current (at least 1A for optimal charging).
• Batteries not holding charge: Over time, all rechargeable batteries degrade. If batteries significantly lose capacity, they may need replacement. Ensure proper charging and storage conditions.

10. Warranty and Support

SEIVI is committed to providing high-quality products and customer satisfaction.

• Warranty: This product comes with a 360-day warranty from the date of purchase.
• Returns: Enjoy a 90-day free return policy.
• Customer Support: For any questions or concerns regarding your product, our customer service team is available 24 hours a day to provide professional assistance. Please refer to your purchase platform for contact details.