INR18650-26EC Battery Cell – 2600mAh 3.7V NMC Lithium | Grade-A

INR18650-26EC Battery Cell — The Premium Building Block for Custom Battery Packs

The INR18650-26EC battery cell is the workhorse of modern lithium battery engineering. Built on INR (Lithium Nickel Manganese Cobalt Oxide — NMC) chemistry, this cell delivers the ideal balance of energy density, discharge capability, and cycle life demanded by professional battery pack builders across Pakistan. Whether you are engineering a marine pack for fishing boats, a solar storage system, an industrial robot or UAV/Drone battery, or a high-discharge power tool pack, the INR18650-26EC provides the consistent, grade-A performance your application requires.

At Newon, we supply only Grade-A matched cells — tested for capacity, internal resistance, and voltage consistency before shipment — ensuring every cell in your pack performs identically across hundreds of charge cycles.

Complete Technical Specifications

Why the INR18650-26EC Is Pakistan’s Preferred Cell for Custom Packs

1. High Energy Density in a Proven Form Factor

At 9.62Wh per cell and 45–50g weight, the INR18650-26EC delivers approximately 192–214 Wh/kg energy density — significantly higher than lead-acid (30–50 Wh/kg) and competitive with premium LiFePO4 cells. The standard 18650 cylindrical form factor is universally compatible with commercial battery holders, nickel strip spot-welding, and existing pack geometries.

2. 3C Continuous Discharge for Demanding Applications

The 7.8A continuous discharge rating makes this cell suitable for medium-to-high power applications that most 18650 cells cannot sustain:

• Power tools (drills, grinders, impact wrenches)
• Electric bikes and scooters (parallel configurations)
• Industrial robots and AGVs
• Drone batteries and RC applications
• High-drain portable power stations

3. 800+ Cycle Life at 80% Retention

For daily-cycling applications like solar storage, the INR18650-26EC delivers 800+ cycles to 80% capacity retention — approximately 2.2 years of daily use.

4. Low Internal Resistance (≤ 20 mΩ)

Low IR means less heat generation under load, more efficient energy transfer, and longer cell life — especially critical in parallel configurations where current sharing depends on matched resistance.

Pack Building Formulas & Calculations

Use these formulas to design your custom battery pack with INR18650-26EC cells:

Pack Voltage Calculation

Pack Voltage (V) = Cell Nominal Voltage × Series Count (S)
Example (4S): 3.7V × 4 = 14.8V nominal
Example (13S for 48V): 3.7V × 13 = 48.1V nominal

Pack Capacity Calculation

Pack Capacity (Ah) = Cell Capacity × Parallel Count (P)
Example (6P): 2.6Ah × 6 = 15.6Ah pack
Example (10P): 2.6Ah × 10 = 26Ah pack

Total Energy (Watt-hours)

Energy (Wh) = Pack Voltage × Pack Capacity
Example (4S6P): 14.8V × 15.6Ah = 230.9Wh
Example (13S10P): 48.1V × 26Ah = 1,250.6Wh (1.25kWh)

Maximum Continuous Discharge Current

Pack Current (A) = Cell Max Discharge × Parallel Count
Example (6P): 7.8A × 6 = 46.8A continuous
Example (10P): 7.8A × 10 = 78A continuous

Cell Count for Target Energy

Cells Required = Target Energy (Wh) ÷ 9.62Wh per cell
Example (500Wh target): 500 ÷ 9.62 = 52 cells minimum

Common Pack Configurations Using INR18650-26EC

INR18650-26EC vs Other 18650 Cells

Decision rule: Choose the INR18650-26EC when you need the best balance of capacity, discharge rate, cycle life, and cost — the default choice for 70% of professional battery pack applications.

Ideal Applications in Pakistan

• Marine & Fishing Boats: packs for fishing reels, trolling motors and auxiliary power in Karachi, Gwadar, and coastal applications.
• Solar Storage: All configurations for home and commercial solar systems.
• Electric Vehicles: E-bike, e-scooter, and e-rickshaw battery packs with various configurations.
• Industrial Robotics: Medium-discharge AGV and robot batteries where Li-ion energy density matters.
• Power Tools: Cordless drills, grinders, and saws requiring 3C+ discharge.
• Portable Power Stations: DIY power banks and camping batteries with custom configurations.
• Medical Devices: Portable oxygen concentrators, CPAP backup batteries, and diagnostic equipment.

Safety Protocols & Handling Guidelines

Charging Protocol

• Charge voltage: 4.20V per cell (never exceed — use CC/CV charger)
• Charge current: Standard 0.5C (1.3A); maximum 1C (2.6A)
• Charge temperature: 0°C to 45°C (do not charge below freezing)
• Charge termination: Current ≤ 50mA at 4.20V

Discharge Protocol

• Discharge cut-off: 2.75V per cell (never discharge below)
• Continuous current: Maximum 3C (7.8A)
• Discharge temperature: -20°C to 60°C

Storage & Handling

• Long-term storage: 50% charge (3.7V per cell), 15–25°C, low humidity
• Storage check: Re-check voltage every 90 days; recharge to 50% if below 3.5V
• Transport: Individually insulated, terminals protected, UN3481 compliant packaging
• Disposal: Never incinerate; recycle through authorized lithium battery recyclers

Safety Warnings

⚠️ WARNING: Lithium-ion cells can cause fire, explosion, or severe injury if mishandled. Never short-circuit, crush, puncture, overcharge, or expose to fire. Always use a compatible BMS with overcharge, over-discharge, overcurrent, and short-circuit protection. Never solder directly to cell terminals — use spot welding or nickel tabs. Only qualified personnel should assemble battery packs.

Newon’s Custom Battery Pack Service

Don’t want to build the pack yourself? Newon’s service engineers complete packs from INR18650-26EC cells — including:

• Cell matching: Capacity and IR tested, matched within 10mV and 5mΩ tolerance
• Spot welding: Professional nickel strip welding with current-rated tab design
• BMS integration: JK, Daly, JBD, ANT smart BMS with Bluetooth monitoring
• Enclosure fabrication: CNC acrylic, PVC heat-shrink, or aluminum cases
• Connector installation: XT60, XT90, Anderson Powerpole, or custom
• Testing & commissioning: Load testing, capacity verification, BMS calibration

Frequently Asked Questions

Is the INR18650-26EC suitable for solar storage?

Yes, for applications requiring 500–800 cycles. For daily-cycling solar systems requiring 2,000+ cycles, LiFePO4 cells are preferred.

Can I use this cell for high-drain power tools?

Yes, up to 7.8A continuous (3C). For extreme-drain tools requiring 15A+ per cell, consider the INR18650-30Q or INR18650-25R instead.

Do you sell cells in bulk for pack builders?

Yes. Bulk pricing available for 50+ cells. All cells are Grade-A, capacity-tested, and IR-matched before shipment. WhatsApp us for bulk quotations.

What BMS do you recommend for INR18650-26EC packs?

JK Smart BMS or Daly BMS with appropriate series count (3S–14S), continuous current rating ≥ your pack’s max discharge, and passive balancing. We supply and integrate BMS as part of our Custom battery solution.

How do I know if my cells are Grade-A?

Grade-A cells have capacity within ±50mAh of nominal (2550–2650mAh), internal resistance ≤20mΩ, and voltage within ±20mV of 3.7V at rest. Newon tests every cell before shipment and provides test reports for bulk orders.

Can you ship to Karachi, Lahore, Peshawar, and UAE?

Yes. Nationwide shipping across Pakistan (2–5 days).

Order Your INR18650-26EC Cells Today

Price: ₨ 470 per cell · Bulk discounts for 50+ cells · Free shipping on orders ≥ ₨ 15,000

Need a custom pack built? Send your voltage, capacity, and application requirements via WhatsApp — we’ll engineer, build, and deliver a complete pack with BMS and enclosure.

📱 WhatsApp / Call: +92 343 9227883 · 📧 Email: info@newon.pk