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Battery Applications & Safety Guidelines

Application

The batteries offered on evebatteries.co.uk are suitable for a wide range of energy storage and power solutions, including:

🔋 Solar Energy Storage – For both off-grid and grid-tied renewable energy systems.
🔋 Electric Vehicles & E-Bikes – Reliable, efficient power for sustainable transportation.
🔋 Home & Industrial Energy Storage Systems (ESS) – Ensures stable power for residential, commercial, and backup systems.
🔋 Marine & RV Power – Provides dependable off-grid energy for boats, caravans, and mobile applications.
🔋 UPS & Backup Power – Keeps critical systems running during power outages.
🔋 DIY & Custom Battery Packs – Popular for hobbyists and engineers building tailored energy solutions.

Safety Guidelines & Warnings

⚠️ IMPORTANT NOTICE ⚠️
All rechargeable batteries require proper handling, charging, and storage. Misuse can result in fire, explosion, injury, or property damage.

General Safety Guidelines

✔ Only purchase and use if you understand the safety requirements for the specific battery type.
✔ Always charge using the correct charger designed for the chemistry of your battery (LiFePO4, Li-ion, NiMH, etc.).
✔ Store in a cool, dry environment away from heat, direct sunlight, or flammable materials.
✔ Follow the manufacturer’s specifications for voltage, current, and temperature.
✔ Use a Battery Management System (BMS) where required to ensure safe operation.
✔ If assembling packs, ensure proper balancing and testing before use.
✔ Resellers must pass these safety warnings on to end users.

🚫 Prohibited Uses & Handling

⛔ Do not short circuit, puncture, crush, incinerate, or attempt to modify any battery.
⛔ Do not use damaged, swollen, or leaking batteries.
⛔ Do not overcharge, over-discharge, or bypass recommended protections.
⛔ Do not expose to water, fire, or extreme temperatures.
⛔ Do not connect in series or parallel without ensuring correct balancing.
⛔ Do not solder directly—use proper connection methods (e.g., spot welding for cells).

⚠ User Responsibility & Risk Acknowledgment

  • The buyer/user is fully responsible for safe handling, charging, and storage.

  • Improper use may cause serious injury, fire, or equipment damage.

  • No guarantee of compatibility with a specific device is provided.

  • Purchase and use of batteries from evebatteries.co.uk is at your own risk.

By purchasing from us, you acknowledge and agree to follow all safety guidelines. Failure to comply may result in hazardous consequences.

21700 40P - 3.6V | 4000mAh | 300 Cycles

Price

£0.00

EVE INR21700‑40P Cylindrical NCM Battery

Unleash high-capacity, high-drain performance with the EVE INR21700‑40P, a Grade A NCM (Nickel-Cobalt-Manganese) lithium-ion cell. Designed for power tools, e-mobility, robotics, and portable energy storage, this cell delivers reliable output and long-lasting performance in demanding applications.

 

Unmatched Durability and Longevity

  • Rated for approximately 300 cycles, providing dependable performance over time.

  • Advanced NCM chemistry ensures stable energy delivery under high-drain conditions.

 

Exceptional Capacity for Demanding Applications

  • Nominal Capacity: 4,000 mAh at 3.6 V for efficient and continuous power.

  • Energy Density: ~219 Wh/kg for a powerful energy-to-weight ratio.

  • Continuous Discharge: 35 A, with maximum short-term discharge up to 50 A.

  • Low AC Internal Resistance: ≤12 mΩ for efficient energy transfer.

 

Seamless Integration

  • Standard 21700 cylindrical form factor (≈21.2 mm × 70 mm) for easy pack assembly.

  • Lightweight at ≈70 g, ideal for mobile or portable applications.

  • Flat-top design ensures secure and stable battery pack construction.

 

Versatile Applications

Perfect for a wide range of high-drain systems:

  • Power tools and garden equipment

  • Electric bikes, scooters, and mobility devices

  • High-performance flashlights and drones

  • Portable power stations and DIY battery packs

 

Technical Specifications

  • Manufacturer: EVE Energy

  • Model: INR21700‑40P

  • Nominal Capacity: 4,000 mAh

  • Nominal Voltage: 3.6 V

  • Cycle Life: ~300 cycles

  • Energy Density: ~219 Wh/kg

  • Max Continuous Discharge: 35 A

  • Max Short-Term Discharge: 50 A

  • AC Internal Resistance: ≤12 mΩ

  • Weight: ≈70 g

  • Form Factor: 21700 cylindrical (flat-top)

  • Protection: None (requires external BMS)

Quantity

Contact Us

OPENING TIMES:

Monday to Friday  9:00 - 17:00

by appointment.

Saturday and Sunday closed.

EVE Batteries UK

Elm Tree Farm,

Unit 8 Thrupp Wharf

Milton Keynes,

Bucks, MK19 7BE

Copyright © 2025 Evebatteries

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