Description
TENPOWER 50XG 21700 Battery
TENPOWER INR21700-50XG 21700 Battery – 5000mAh High-Output Lithium-Ion Cell
Overview
The TENPOWER INR21700-50XG is a high-performance lithium-ion rechargeable battery cell engineered for high-drain and power-dense applications. With a 5000mAh nominal capacity, extremely low internal resistance (≤4mΩ), and the ability to deliver up to 40A continuous discharge (and 90A with temperature cutoff), the 50XG provides excellent power stability, minimal voltage sag, and long service life.
Designed for professional battery pack integration, the 50XG is suitable for demanding applications requiring high current output, thermal reliability, and durability when paired with appropriate protection and battery management systems.
Key Features
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High Capacity: 5000mAh nominal capacity for extended runtime
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High Discharge Performance:
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40A continuous discharge (no temperature cutoff)
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Up to 90A continuous with 75°C temperature cutoff
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Low Internal Resistance: ≤4mΩ (AC 1kHz @ 25°C, 30% SOC)
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Lithium-Ion INR Chemistry: Stable, efficient, and high-power output
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Rechargeable & Durable: Rated for 500 cycles with ≥60% capacity retention
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21700 Form Factor: Higher energy density than 18650 cells
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Flat-Top, Unprotected Cell: Intended for use in engineered and protected battery packs
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Factory Shipped at ~30% SOC: Optimized for storage and transport safety
Specifications
| Specification | Details |
|---|---|
| Brand | TENPOWER |
| Model | INR21700-50XG |
| Battery Type | 21700 Lithium-Ion (INR) |
| Nominal Capacity | 5000mAh |
| Minimum Capacity | 4950mAh |
| Nominal Voltage | 3.6V |
| Full Charge Voltage | 4.2V (max 4.25V) |
| Discharge Cutoff Voltage | 2.5V |
| Max Continuous Discharge | 40A (no temp cutoff) / 90A (75°C cutoff) |
| Max Pulse Discharge | 140A (3 seconds) |
| Standard Charge Rate | 0.5C (2.5A, CCCV) |
| Max Charging Current | 15A |
| Internal Resistance | ≤4mΩ (AC 1kHz) |
| Cycle Life | ≥500 cycles (≥60% capacity retention) |
| Operating Temperature | Charge: 0–45°C / Discharge: −20–60°C |
| Cell Surface Temperature | Discharge up to 80°C |
| Battery Top | Flat Top |
| Protected | No (Unprotected Cell) |
| Diameter | ≤21.50mm |
| Length | ≤70.50mm |
| Weight | ≤71g |
Applications
The TENPOWER 50XG is designed for professional and high-drain applications, including:
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Electric Vehicles (EVs) & E-Bikes
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High-Performance Battery Packs (with proper BMS)
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Power Tools & Industrial Equipment
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Robotics & Automation Systems
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Energy Storage Systems (ESS)
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High-Current Electronics
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Professional Mobility & Power Solutions
Safety Guidelines & Warnings
⚠ IMPORTANT SAFETY NOTICE
Lithium-ion batteries require proper technical knowledge and handling. Improper use may result in fire, explosion, serious injury, or property damage.
General Safety Guidelines
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Only purchase and use if you fully understand lithium-ion battery safety
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Use only with a proper Battery Management System (BMS)
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Charge using a lithium-ion compatible charger (CC-CV)
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Never exceed 4.25V charging voltage
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Charge on a fire-resistant surface
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Never leave charging batteries unattended
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Store in a cool, dry, non-conductive environment
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Keep away from metal objects to prevent short circuits
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Spot-weld connections only — do NOT solder directly
🚫 Prohibited Uses & Handling
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❌ Do NOT use in e-cigarettes, vapes, or similar consumer devices
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❌ Do NOT mix old and new or different-brand batteries
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❌ Do NOT short circuit, puncture, crush, incinerate, or modify
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❌ Do NOT use if the wrap or insulator is damaged
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❌ Do NOT overcharge or over-discharge
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❌ Do NOT expose to liquids, extreme heat, or direct sunlight
User Responsibility & Risk Acknowledgment
By purchasing this battery, the user accepts full responsibility for safe handling, charging, storage, and use.
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No guarantee of compatibility with any specific device is implied
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This is an unprotected industrial lithium-ion cell
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Intended for professional battery pack assembly only
Use at your own risk.
Frequently Asked Questions
Yes. All cells we sell are guaranteed authentic, Grade A, and brand new. Not reclaimed, used, or rewrapped. We also prioritize fresh manufacturing dates, so you’re not receiving cells that have been sitting around for years.
Some sellers offer Grade B cells that can have inconsistent voltage, higher internal resistance, reduced performance, or other issues. You will never receive a Grade B, reclaimed, or used cell from us.
These are sold as bare cells (no welded tabs or leads) unless the listing explicitly states otherwise.
To make pack building easier, our cells are sorted and batched for matching internal resistance, voltage, and date code, so they arrive ready to be assembled into a pack.
U.S. orders ship from Atlanta, Georgia.
For international orders outside the USA, we may ship from a different fulfillment hub depending on the product’s manufacturing location, to ensure faster and more efficient delivery.
Shipments within the USA, delivery in 1–3 days (up to 5). Expedited shipping available. International shipping varies—contact us to inquire.