Sinowatt 25SP 18650 Battery – 2.5 Ah, 20 A (Flat-Top)

Reliable performance meets great value with the Sinowatt 25SP 18650 Battery. Offering a solid 2,500 mAh capacity and a continuous 20 A discharge rating, this flat-top Li-Ion cell is ideal for moderate to high-wattage vaping, flashlights, and electronic devices. 

Key Features

• Consistent 2,500 mAh Capacity – Verified by independent testing and often averaging around 2,600 mAh in real-world use. 
• 20 A Continuous Discharge Rating – Matches the Samsung 25R8 performance up to 10 A, with acceptable performance at 20 A. 
• Flat-Top 18650 Form Factor – Compatible with most mods, flashlights, and handheld electronics.
• Sinowatt Quality Assurance – Original manufacturer-grade battery—not a rewrap—and a reliable alternative to name-brand cells. 

Technical Specifications

Real-World Performance

Bench testing shows that the Sinowatt 25SP performs similarly to Samsung 25R8 at moderate discharge (≈10 A). While 20 A is within spec, slight voltage sag may occur at higher loads—staying under 20 A is best for longevity. 

Safety Notice

⚠ Important Safety: This is an unprotected Li-Ion cell. Use only in devices with proper protection circuits (PCB/BMS) and always charge with a dedicated Li-Ion charger. Store in a secure battery case, and inspect wraps regularly for damage. Loose storage or overheating can lead to short circuits or battery failure. 

Recommended Accessories

• Nitecore D4 Battery Charger – Safe and versatile charging for 18650 cells
• 18650 Protective Battery Case – Safeguards your cells when not in use
• Sinowatt S35 18650 Battery – Higher capacity alternative for extended runtime

Why Choose the Sinowatt 25SP?

• Reliable mid-range power with a solid capacity and discharge rating.
• Proven performance through independent benchmarking.
• Great value alternative to more expensive branded cells without compromise on specs.