Description
Tabless Design Advantage – Reduced Resistance, Higher Efficiency
The BAK INR2170-45D features a tabless internal design, a modern innovation that enhances both performance and thermal management. Unlike traditional cells that rely on welded tabs to connect the anode and cathode to the terminal ends, tabless cells integrate the current path directly into the entire surface of the electrode, drastically reducing internal resistance and improving heat dissipation.
The BAK INR2170-45D is a premium 21700 lithium-ion power cell, known for its exceptional capacity, efficiency, and power output. With a 4500mAh capacity and a nominal voltage of 3.6V, it is engineered for high-drain applications requiring stable, long-lasting energy delivery.
Its maximum continuous discharge rate of 60A, regulated with an 80°C temperature cut-off, ensures sustained performance under heavy loads. The low internal resistance and advanced lithium-ion chemistry contribute to its superior efficiency, minimizing power loss and optimizing charge retention. With an estimated 600+ charge cycles, this cell is built for durability and reliability.
Key Features
✅ Lower Internal Resistance – Enables higher discharge rates with less voltage sag under load.
✅ Improved Heat Dissipation – Heat spreads more evenly across the electrode, reducing thermal stress and prolonging cell life.
✅ More Efficient Power Flow – Maximizes the surface area for current transfer, enhancing energy delivery during peak demand.
✅ Increased Reliability – Fewer welds and connections reduce failure points, making the cell more robust for demanding applications
✅ High Capacity – 4500mAh provides extended runtime before requiring a recharge.
✅ High Discharge Rate – 60A max continuous discharge (with 80°C temp cut-off) for high-drain applications.
✅ Optimized Energy Density – The 21700 format offers increased energy storage compared to standard 18650 cells.
✅ Rechargeable & Durable – Designed for multiple charge cycles with consistent power output.
✅ Premium Lithium-Ion Chemistry – Ensures high efficiency, stability, and minimal power loss.
Specifications
| Specification | Details |
|---|---|
| Brand | BAK |
| Model | INR2170-45D |
| Battery Type | 21700 |
| Capacity (Typical) | 4500mAh |
| Capacity (Rated) | 4400mAh |
| Nominal Voltage | 3.6V |
| Full Charge Voltage | 4.2V |
| Discharge Cutoff Voltage | 2.5V |
| Continuous Discharge Rate (CDR) | 60A (with 80°C Temp Cutoff) |
| Rechargeable | Yes |
| Protected | No (Unprotected cell – requires appropriate safety measures) |
| Cycle Life | 600+ charge cycles |
| Diameter | 21.3mm |
| Length | 70.5mm |
| Weight | ~70g |
| Standard Charge Current | 2.25A |
| Maximum Charge Current | 6.75A |
| Operating Temperature | - Charging: 0°C to 45°C - Discharging: -20°C to 60°C |
Ideal Applications
🔋 Electric Vehicles (EVs) & E-Bikes – Delivers sustained power for extended performance.
🔋 Battery Packs – Frequently used in custom energy storage solutions.
🔋 Power Tools – Ideal for cordless drills, saws, and industrial tools.
🔋 RC Vehicles & Drones – Provides high-output energy for demanding operations.
🔋 Flashlights & Tactical Gear – Suitable for high-intensity LED flashlights and professional gear.
🔋 Energy Storage Systems (ESS) – Supports solar storage and backup power applications.
Safety Warning for Lithium-Ion Battery Usage
Customers should have a clear understanding of lithium-ion battery handling and safety before making a purchase. Lithium-ion batteries are highly sensitive and may pose fire, burn, or explosion risks if improperly handled. Always charge batteries on fire-resistant surfaces, and never leave them charging unattended.
By purchasing, you assume full responsibility for any injury, damage, or loss arising from the incorrect use or handling of lithium-ion batteries or chargers. Compatibility with specific devices is not guaranteed. Only charge using a smart charger designed specifically for this battery type, and do not mix old or used batteries with new ones.
Important Usage Guidelines:
- Not for Use in E-Cigarettes or Similar Devices: Lithium-ion batteries present a serious risk of injury, property damage, or even death if improperly used.
- Risk of Fire and Explosion: Misuse can cause batteries to ignite, explode, or release harmful gases.
- Always Use in a Protected Pack: Ensure batteries are used within intended specifications and supported by appropriate circuitry.
- Proper Storage and Handling: Store batteries in protective cases, away from metal items to prevent short circuits.
- Inspection Prior to Use: Do not use batteries with damaged wrappers, torn insulators, or visible damage.
- Follow Manufacturer's Charging Specifications: Avoid overcharging or over-discharging, and never alter, dismantle, puncture, crush, or burn.
- Heat and Water Precautions: Do not expose batteries to high temperatures or any liquids.
- Assembly Guidelines: Batteries should only be spot welded; do not solder directly onto battery terminals.
Users are expected to have battery-handling knowledge before purchasing. By using these batteries, you acknowledge that usage is solely at your own risk, and you take full responsibility for any resulting consequences.
For Resellers: Please ensure all safety information is passed along to end users to promote safe handling and proper use.