Please note that printing may vary between batches, they are all original

The EVE INR21700/50PL is a high-performance rechargeable lithium-ion cell designed for demanding applications that require both high energy capacity and high-current power delivery.

Featuring a minimum capacity of 5000mAh, 3.6V nominal voltage, and a manufacturer-specified maximum discharge current of 70A (14C), the EVE 50PL combines substantial energy storage with impressive high-discharge capability in the popular 21700 battery format.

With low internal resistance and a compact cylindrical design, the 50PL is suitable for compatible high-output flashlights, power tools, and professionally engineered battery systems.

Important: This is an unprotected flat-top lithium-ion cell without a built-in protection circuit (PCB/BMS).

5000mAh High Capacity

The EVE 50PL delivers a minimum standard discharge capacity of 5000mAh, providing approximately 18Wh of nominal energy.

Its high-capacity design helps support extended operation in compatible equipment while maintaining the ability to deliver substantial current when required.

Unlike batteries optimized solely for capacity or power, the 50PL offers a combination of energy storage and high-discharge performance.

Up to 70A Maximum Discharge

According to EVE's November 2025 product specification, the INR21700/50PL supports a maximum discharge current of 70A (14C) under manufacturer-defined conditions.

This makes it suitable for demanding high-power applications where substantial current delivery is required.

High-current operation is subject to important thermal limits:

• Maximum Discharge Current: 70A (14C)

• Discharge Cutoff Voltage: 2.50V

• Recommended Temperature Cutoff: 75°C

• Maximum Temperature Cutoff: 80°C

The 70A figure represents the manufacturer's maximum discharge specification and does not guarantee sustained 70A operation under all cooling conditions.

Actual sustained discharge performance depends on battery temperature, cooling, device design, and operating conditions.

Low Internal Resistance

The EVE 50PL features an initial AC internal impedance of 5mΩ or less, measured at 1kHz under the manufacturer's specified conditions.

Low internal resistance helps support efficient power delivery and reduces voltage drop under heavy loads.

This characteristic is particularly valuable in compatible high-output flashlights and other high-drain applications.

High-Current Discharge Performance

EVE's official specification includes discharge performance testing at multiple current levels:

These results demonstrate the battery's ability to maintain a high proportion of its reference discharge capacity at elevated current levels under the specified laboratory test conditions.

Actual performance may vary with temperature, cooling, and operating conditions.

Rechargeable 21700 Lithium-Ion Cell

The EVE INR21700/50PL uses a nominal voltage of 3.6V and a maximum charging voltage of 4.20V.

It supports standard lithium-ion constant-current/constant-voltage (CC/CV) charging.

• Standard Charging Current: 2.5A (0.5C)

• Maximum Charging Current: 10A (2C), under specified conditions

• Charging Voltage: 4.20V

• Charge Termination Current: 0.1A

Use only a compatible lithium-ion charger with appropriate voltage, current, and temperature control.

Cycle Life Performance

The EVE 50PL is tested under demanding high-current cycling conditions.

According to the manufacturer's November 2025 specification:

• Charging current: 10A (2C)

• Discharging current: 40A (8C)

• Discharge cutoff: 2.50V or 75°C

• Rest after charging: 10 minutes

• Rest after discharging: 30 minutes

• Cycle-life criterion: At least 60% of the initial test capacity after 400 cycles

These results reflect the manufacturer's specified test conditions. Actual battery lifespan depends on operating current, charging habits, temperature, and usage.

Unprotected Flat-Top Design

The EVE INR21700/50PL is an unprotected lithium-ion cell without an integrated protection PCB or BMS.

It does not independently provide electronic protection against overcharging, over-discharging, overcurrent, or external short circuits.

The battery must be used only in compatible equipment with appropriate protection and thermal management.

Before purchasing, confirm that your device supports:

• 21700 lithium-ion battery format

• Flat-top positive terminal

• Unprotected battery cells

• 3.6V nominal lithium-ion voltage

• The cell's physical dimensions and electrical requirements

Not all flashlights designed for 21700 batteries are compatible with unprotected flat-top cells.

Key Features

• 5000mAh minimum capacity

• 3.6V nominal voltage

• Approximately 18Wh nominal energy

• 70A (14C) maximum discharge current

• Low initial AC impedance of ≤5mΩ

• 10A maximum charging current under specified conditions

• High-current discharge performance

• 21700 cylindrical battery format

• Flat-top positive terminal

• Unprotected design without PCB/BMS

• Suitable for compatible high-drain equipment

Technical Specifications

Specifications are based on EVE Energy's November 2025 INR21700/50PL product specification, Version A. High-current performance is subject to the manufacturer's electrical and thermal limits.

Important Battery Safety Information

WARNING: UNPROTECTED HIGH-DISCHARGE LITHIUM-ION CELL

This battery does not contain a built-in protection circuit. Improper handling, charging, or operation may result in overheating, fire, or serious injury.

• Use only in equipment specifically compatible with unprotected 21700 lithium-ion cells.

• Ensure the device or battery management system provides appropriate overcharge, over-discharge, overcurrent, and temperature protection.

• Charge only with a suitable CC/CV lithium-ion charger.

• Never short-circuit the positive and negative terminals.

• Do not exceed the manufacturer's voltage, current, or temperature limits.

• Do not use damaged, dented, leaking, or improperly insulated cells.

• Never carry loose batteries with keys, coins, or other conductive objects.

• Store and transport individual cells in protective battery cases.

• Do not mix different battery models, ages, or charge levels in multi-cell battery systems.

• Battery pack assembly requires appropriate engineering and protection circuitry.

• Keep batteries away from children.

Package Contents

• 1 × EVE INR21700/50PL 5000mAh Unprotected Li-ion Battery

Charger and accessories are not included unless otherwise specified.

High Capacity Meets High-Discharge Performance

The EVE INR21700/50PL 5000mAh 70A Battery combines high capacity, low internal resistance, and strong high-current capability in a standard 21700 format.

For compatible high-output flashlights and demanding power applications, it offers a practical balance of energy storage and high-discharge performance.

Please verify device compatibility before ordering. This is an unprotected flat-top battery without a built-in PCB.

Download the specification

SHIPPING
The final shipping cost and estimated delivery timeframe will be available to you during checkout. Currently, we offer 3 International shipping methods which are steady and easy to track. Priority worldwide shipping, Premium ( Partial countries) and a faster Express shipping. The estimated times stated below are not guaranteed. An international package could experience delays like postal strikes or severe weather or Cov-19 situation. All shipping ways, PO Box address is not acceptable.

For some flashlights, there's a pure battery inside（phone charging）,If We can not ship your packages via USPS or DHL,we'll ship your package in another way.

Note:
When you place an order for just the batteries, for easy shipping, faster and safe delivery, the batteries are placed in the flashlights.

If you don’t receive your order within the estimated time frame provided below and suspect that it might be lost in transit, please contact Flashlightgo Support ( support@flashlightgo.com ) and we can look into the order with the courier. Lost-in-transit requests must be submitted to Flashlightgo Support within 3 months of the date of shipping or before the courier archives the tracking information.

Option 1.
Express by DHL/UPS/Fedex/Aramax/SF etc ( there may be tax need to pay in this way),
The estimated time of delivery is usually 3-7 work days depending on the country. Includes detailed tracking and confirmation of delivery.

Option 2.
Premium ( 6-10days, All tax and Duty Paid),
All tax and duty are prepaid to carrier by Flashlightgo before shipping, so you dont need to pay any tax or duty when you get it.

Option 3.
Priority shipping(1-2 Weeks, average 10 days)
If we marked it is with all tax and duty paid, all tax and duty are prepaid to carrier by Flashlightgo before shipping, so you dont need to pay any tax or duty when you get it.

Learn more,Please click on Here.

To ensure that you get the desirable product, we allow a seven-day product return period. Any product return application outside this period will not be entertained.
All returned product must be unused and the original package should be kept.

Return：
We do not offer return for personal products like socks and hats or food, magazine and fragile or dangerous products The original receipt must be available for application of return.

Discount products：
No product return for discount products

Gifts products：
If the item is marked as a gift when purchased and shipped directly to you, it cannot be exchanged , refunded or warranty.

Exchange：
We only replace items if they are defective or damaged.
Exchange service are offered only to wrong deliveries or product damage not caused by client. If needed, please email to info@flashlightgo.com.

Warranty
How long is the warranty period?
Flashlightgo warrants to the original purchaser that the Product(s) shall be free of any defect in material or workmanship for a period of one year for labor and one year for parts from the date of the original order except the items listed below:
Chargers,Batteries and Other Accessories: 3 months warranty

Should the Product(s) supplied by Flashlightgo prove defective because of improper workmanship or material as reasonably determined by us, Flashlightgo agrees, at its option, to either repair or replace the Product free of charge, excluding any shipping or handling charges.

Learn more,Please click here.