Vapcell K55 21700 15A 5500mAh Li-ion Battery (Flat Top)

⚡High Capacity 21700 Battery for Maximum Runtime

The Vapcell K55 21700 5500mAh battery is engineered for users who demand maximum runtime, stable output, and premium reliability. Built using advanced INR lithium-ion chemistry, the K55 delivers exceptional energy density while maintaining safe and consistent performance.

With a massive 5500mAh capacity, this cell is ideal for flashlights, power banks, and low-to-mid drain electronics where extended usage time is critical. The 21700 format provides greater capacity and efficiency compared to traditional 18650 batteries, making it a top upgrade choice.

🔑 Key Features:

• ✅ 5500mAh Ultra-High Capacity – Extended runtime for long-use applications
• ✅ 21700 Battery Format – More energy vs 18650 cells
• ✅ Stable 3.6V–3.7V Output – Consistent performance across discharge cycle
• ✅ INR Lithium-Ion Chemistry – Reliable, rechargeable, and long-lasting
• ✅ Optimized for Runtime Over Drain – Ideal for moderate-drain devices
• ✅ Flat Top Design (Button Top Optional) – Versatile compatibility
• ✅ Low Self-Discharge Rate – Maintains charge during storage

📊 Technical Specifications:

• Model: Vapcell K55
• Battery Size: 21700
• Chemistry: INR (Lithium-ion)
• CDR: 15A
• Typical Capacity: 5500mAh
• Nominal Voltage: 3.6V – 3.7V
• Max Charge Voltage: 4.2V
• Discharge Type: High capacity / moderate drain
• Standard Dimensions: ~21mm × 70mm (21700 format)
• Rechargeable: Yes (CC/CV charging)

🔦 Best Uses:

This 21700 5500mAh lithium-ion battery is perfect for:

• 🔦 High-lumen flashlights (long runtime setups)
• 🔋 Power banks & portable energy storage
• 🎒 EDC gear requiring extended battery life
• ⚡ Low-to-medium drain electronics
• 🚐 Camping, emergency kits, and backup power systems

🚀 Why Choose Vapcell K55?

If you're searching for a high capacity 21700 battery for flashlights, the Vapcell K55 delivers:

• 🔋 One of the highest capacities in the 21700 class
• ⏱️ Longer runtime vs 4000–5000mAh cells
• ⚡ Stable voltage output for consistent device performance
• 🧠 Ideal balance for users prioritizing runtime over max amperage

👉 Compared to high-drain cells, the K55 is optimized for efficiency and endurance, not extreme current draw.

⚠️ Safety & Handling:

• Use only with a 21700-compatible Li-ion charger (4.2V max)
• Do not exceed device current limits
• Never short circuit, puncture, or over-discharge
• Store in a protective battery case
• Inspect wraps regularly—do not use damaged cells

*** WARNING ***

All users must have appropriate understanding of lithium-ion batteries before purchase. Use caution when working with and using lithium-ion batteries as they are very sensitive to charging characteristics and may explode, burn, or cause a fire if misused or mishandled. Always charge in or on a fire-proof surface. Never leave batteries charging unattended. Buyer is responsible for any damage or injury caused by misuse or mishandling lithium-ion batteries and chargers. No express or implied guarantee of compatibility with any device can be made. Charge only with a smart charger designed for this specific type of lithium-ion battery. Do not mix and match old and new, used and unused batteries.

• DO NOT USE WITH E-CIGARETTE, VAPORIZER, OR SIMILAR DEVICE
• MISUSING OR MISHANDLING LITHIUM-ION BATTERIES CAN POSE A SERIOUS RISK OF PERSONAL INJURY, PROPERTY DAMAGE, OR DEATH
• BATTERIES MAY EXPLODE, BURN, OR CAUSE A FIRE IF MISUSED OR MISHANDLED
• ONLY USE WITH PROPER CIRCUITRY IN A PROTECTED BATTERY PACK
• ONLY USE WITHIN MANUFACTURER LISTED SPECIFICATIONS
• DO NOT STORE LOOSE BATTERY IN A POCKET, PURSE ETC. - ALWAYS USE A PROTECTIVE CASE OR BOX
• KEEP AWAY from metal objects to prevent short circuiting
• DO NOT short circuit
• DO NOT use if wrapper or insulator is damaged or torn
• DO NOT use if damaged in any way
• DO NOT overcharge or over-discharge
• DO NOT modify, disassemble, puncture, cut, crush, or incinerate
• DO NOT expose to liquids or high temperatures
• DO NOT solder, spot weld only
• User must be familiar with handling lithium-ion batteries before purchase
• Usage of batteries is AT YOUR OWN RISK
• ALWAYS charge in or on a fire-proof surface and never leave charging batteries unattended.