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3.7V 2200mAh-3500mAh 18650 Li-ion Rechargeable Battery DIY for Bike LED Light Flashlight Headlight Portable Power bank Charger
3.7V 2200mAh-3500mAh 18650 Li-ion Rechargeable Battery DIY for Bike LED Light Flashlight Headlight Portable Power bank Charger
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18650 3.7V Li-ion Rechargeable Battery with Tabs for DIY Battery Pack
Professional-grade 18650 cylindrical lithium-ion rechargeable battery featuring premium FMA or Panasonic cells. Available in five capacity options (2200mAh to 3500mAh) with four tab configurations (Type A, Type B, Type C, Type D) specifically designed for DIY battery pack assembly. Perfect for bike lights, LED flashlights, headlights, portable power banks, and custom battery projects.
Key Features
- Five Capacity Options: 2200mAh, 2600mAh, 3300mAh, 3500mAh (FMA or Panasonic)
- Four Tab Configurations: Type A, Type B, Type C, Type D for maximum flexibility
- Premium Cell Options: FMA cells for cost-effectiveness or Panasonic cells for premium performance
- Standard 18650 Size: Industry-standard 18mm × 65mm format
- DIY Battery Pack Friendly: Pre-welded tabs for easy series/parallel connections
- High Quality Assembly: Professional tab welding by FMA
- Long Cycle Life: 500+ charge cycles
Package Contents
- 1× 18650 3.7V Li-ion Battery with tabs (capacity, cell type, and tab configuration as selected)
Capacity & Cell Comparison
| Capacity | Cell Type | Runtime vs 2200mAh | Best For |
|---|---|---|---|
| 2200mAh | FMA cells | Baseline | Budget-friendly, standard applications |
| 2600mAh | FMA cells | 18% longer | Extended runtime, good value |
| 3300mAh | FMA cells | 50% longer | High capacity, cost-effective |
| 3500mAh (FMA) | FMA cells | 59% longer | Maximum FMA capacity |
| 3500mAh (Panasonic) | Panasonic cells | 59% longer | Premium Japanese quality, maximum reliability |
Technical Specifications
| Size Designation | 18650 |
| Nominal Voltage | 3.7V |
| Chemistry | Li-ion (Lithium-Ion) |
| Diameter | 18mm |
| Length | 65mm (with tabs may vary) |
| Weight Range | 90g - 96g |
| Charge Voltage | 4.2V |
| Discharge Cut-off | 2.75V |
| Cycle Life | 500+ cycles |
| Cell Package | PVC Heat-Shrink Tube |
| Tab Options | Type A, Type B, Type C, Type D |
| Assembly | FMA |
| Condition | Brand New |
Four Tab Configuration Options for DIY Battery Pack Assembly
| Tab Type | Positive (+) Tab | Negative (-) Tab | Best For |
|---|---|---|---|
| Type A | Top center | Bottom side | Standard series connection, vertical stacking |
| Type B | Top side | Bottom side (opposite) | Side-by-side parallel connection, compact packs |
| Type C | Top side | Bottom side (same side) | Easy soldering, custom configurations |
| Type D | Top dual tabs | Bottom dual tabs | Enhanced stability, high-current applications |
Common Applications
- Bike LED Lights: Electric bicycle lighting systems
- LED Flashlights: High-power flashlights and torches
- Headlights: Bike and outdoor headlamps
- Portable Power Banks: DIY power bank assembly and repair
- Battery Chargers: Custom charger battery packs
- E-bikes: Electric bicycle battery pack assembly
- Solar Systems: Solar power storage battery banks
- Laptop Batteries: Laptop battery pack repair
- Power Tools: Cordless tool battery packs
- Custom Projects: DIY electronics and battery pack projects
Why Choose FMA Batteries?
FMA specializes in professional battery pack assembly using premium cells. Our tab welding ensures reliable connections for DIY battery pack projects. Each cell is tested and assembled to strict quality standards, perfect for custom battery pack builders and electronics enthusiasts.
Cell Brand Comparison
FMA Cells:
- High-quality cells manufactured to strict standards
- Excellent performance-to-price ratio
- Reliable for most applications
- 500+ cycle life
- Cost-effective solution
Panasonic Cells (3500mAh only):
- Premium Japanese-made cells
- Superior consistency and reliability
- Longer cycle life (up to 500+ cycles)
- Better performance in extreme temperatures
- Industry-leading quality
- Ideal for critical applications
Safety Information
⚠️ IMPORTANT SAFETY WARNINGS:
Assembly Safety: Battery pack assembly requires knowledge of electrical safety. If unsure, consult a professional.
BMS Required: Always use a Battery Management System (BMS) for multi-cell packs to prevent overcharge, over-discharge, and short circuits.
Charging: Use only Li-ion compatible chargers with correct voltage settings (4.2V per cell).
Storage: Store at 40-60% charge (3.7-3.9V) in cool, dry place.
Operation: Do not short-circuit, puncture, crush, or disassemble cells.
Temperature: Charge: 0-45°C, Discharge: -20-60°C, Storage: -20-35°C.
Disposal: Dispose according to local regulations. Do not incinerate or dispose of in regular trash.
Polarity: Always verify polarity before connecting cells. Reversed polarity can cause fire or explosion.
Shipping & Transportation Notice
Hazardous Material: This product contains lithium-ion batteries and is classified as dangerous goods for shipping purposes.
Air Transport Restrictions: Due to international air transport regulations, battery shipments may be subject to additional restrictions and longer transit times.
Packaging Compliance: All shipments comply with UN3480 or UN3481 packaging requirements for lithium-ion batteries.
Delivery Time: Battery-containing parcels may experience extended delivery times due to stricter customs inspections and carrier handling procedures.
Documentation: Proper hazardous materials documentation accompanies all shipments to ensure compliance with international shipping regulations.
