BAK 45D 21700 Flat Top Battery – High-Performance Lithium-Ion Power Cell
Data Sheet
Overview
The BAK 45D 21700 Flat Top Battery is a high-capacity lithium-ion rechargeable power cell, designed for superior performance and efficiency. With a 4500mAh capacity and a continuous discharge rate of 60A, this battery is perfect for high-drain applications, ensuring long-lasting power, stability, and durability across various demanding uses.
Key Features
✅ High Capacity: 4500mAh delivers extended runtime before requiring a recharge.
✅ High Discharge Rate: 60A continuous discharge, ideal for high-performance applications.
✅ Lithium-Ion Chemistry: Ensures efficiency, stability, and minimal power loss.
✅ Rechargeable & Durable: Engineered for multiple charge cycles with consistent power output.
✅ Larger 21700 Size: Provides increased energy density compared to 18650 cells.
Specifications
| Specification |
Details |
| Brand |
BAK |
| Model |
45D |
| Battery Type |
21700 |
| Capacity |
4500mAh |
| Nominal Voltage |
3.6V |
| Full Charge Voltage |
4.2V |
| Discharge Cutoff Voltage |
2.5V |
| Continuous Discharge Rate (CDR) |
60A with 80C Temp Cutoff |
| Rechargeable |
Yes |
| Protected |
No (Unprotected cell – use with proper safety measures) |
| Cycle Life |
~600+ charge cycles |
| Diameter |
21.3mm |
| Length |
70.5mm |
| Weight |
~70g |
Applications
The BAK 45D 21700 is widely used in high-drain applications, including:
🔋 Electric Vehicles (EVs) & E-Bikes – Delivers sustained power for extended performance.
🔋 Battery Packs – Frequently used in custom battery assemblies for energy storage solutions.
🔋 Power Tools – Ideal for cordless drills, saws, and other industrial tools.
🔋 RC Vehicles & Drones – Provides reliable, 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 Guidelines & Warnings ⚠
Lithium-ion batteries require proper handling and understanding of safety precautions. Misuse can result in fire, explosion, or serious injury.
General Safety Guidelines
✔ Only use if you have prior knowledge of lithium-ion battery safety.
✔ Always charge on a fire-resistant surface—never leave batteries unattended while charging.
✔ Use only a smart charger designed for lithium-ion batteries.
✔ Store in a protective case—never carry loose batteries in a pocket, bag, or purse.
✔ Keep away from metal objects (keys, coins, tools) to prevent short circuits.
✔ Only use within the manufacturer’s specifications and in protected battery packs.
✔ Resellers must provide these safety warnings to all customers.
🚫 Prohibited Uses & Handling
⛔ DO NOT use this battery in e-cigarettes, vaporizers, or similar devices.
⛔ DO NOT mix old and new or used and unused batteries.
⛔ DO NOT short circuit, puncture, crush, incinerate, or modify the battery.
⛔ DO NOT use if the battery wrapper is damaged or torn.
⛔ DO NOT overcharge or over-discharge—this may result in failure.
⛔ DO NOT expose the battery to liquids, extreme heat, or direct sunlight.
⛔ DO NOT solder directly—only use spot welding for battery pack assembly.
⚠ User Responsibility & Risk Acknowledgment
- The user assumes full responsibility for proper handling, charging, and storage.
- Misuse or mishandling may result in serious injury or damage.
- No guarantee of compatibility with specific devices is provided.
- By purchasing this battery, you acknowledge and agree to follow all safety guidelines.
Stay safe and handle responsibly. 🔋
