Samsung 21700 Battery 5000mAh INR21700-50E Rechargeable Flat Top Li-ion 3.7V Free Battery Case Included

IN STOCK-Usually ships the same business day
Minimum Purchase:
2 units
Bulk Pricing:
Buy in bulk and save
Free Battery Case is included when batteries are bought in quantities of 2 or multiples of 2. (Example 2, 4, 6, 8, 10, etc.)
Authentic-Battery Cell:
Manufactured in South Korea
  • Samsung 50e 21700 battery flat top inr2170050e
  • Samsung 50e 21700 battery case holder included
MSRP: $9.99
— You save $1.00


Samsung 21700 battery: INR21700-50E 21700 Genuine rechargeable battery high capacity - high drain cell.

New and improved. Authentic Samsung 21700 cell.

FREE 21700 battery case included with each pair of batteries (2 batteries = One Free case).

Recommended for: Professionals and Experienced Li-ion battery pack builders.

Battery INR2170050E Specifications:

  • Nominal Capacity: 5000 mAh
  • Nominal Voltage: 3.6V/3.7V
  • Low Discharge Voltage Limit (Cut-Off): 2.5V
  • Max Continuous Discharging Current: 9.8A
  • Max Pulse Discharging Current: 13.7A
  • Dimensions: 70.8mm x 21.25mm
  • Weight (max): 69.5g
  • Color: Blue
  • Positive Terminal: Flat Top
  • Protected?: No This is Unprotected 21700 Battery
  • Recommended charging current: 1A-2A
  • Operating Temperature / Charge: 0 to 45°C
  • Operating Temperature / Discharge: -20 to 60°C


Highly recommended 21700 50E compatible charger up to 2x batteries

Highly recommended 21700 50E compatible charger up to 4x batteries

Highly recommended 21700 50E compatible charger up to 8x batteries




Failure to read, and follow Li-ion safety instructions, and warnings may result in fire, personal injury, and property damages if the battery is charged and/or used improperly.


  • DO NOT SHORT CIRCUIT. Short circuits may cause a fire and injury!
  • Charge battery fully to 4.2V before first use.
  • Use high-quality charger specifically designed to charge Li-ion batteries.
  • Do not charge unattended.
  • Always keep your battery that is not in use inside the plastic battery holder(container).
  • Do not keep a bare battery in your pocket, purse, or anywhere together with other metal (conductive) objects.
  • Never attach any metal moving part |magnet| to the top positive or the bottom negative battery contact.
  • Stop using the battery with damaged PVC tube (wrap) or terminal insulator immediately.
  • If the battery is damaged in any way stop using it immediately.
  • Never discharge a Li-ion battery at a rate exceeding the maximum discharge current specified for that battery.
  • Never use force to install (insert) Li-ion battery.
  • Do not use old, and new batteries together.
  • Do not solder directly onto the battery.
  • Do not immerse in any liquid.
  • Do not drop the battery. Always keep it in a plastic protective holder.
  • Do not place the battery in high-pressure containers, microwave ovens, or on induction cookware.
  • Immediately discontinue use of the battery if, while using, charging or storing the battery, the battery emits an unusual smell, feels hot, changes color or shape, or appears abnormal in any other way.
  • Do not carry, or store the batteries together with hairpins, necklaces, or other conductive metal objects.
  • Use only high-quality battery Li-ion charger (CC/CV 4.2V max).
  • Do not expose to heat.
  • Do not disassemble, or modify the battery.
  • Keep the battery away from children, and pets.
  • Never charge, or store the batteries inside your car in extreme temperature. Extreme temperatures (low or high) might ignite the battery, and cause a fire.
  • Do not short (connect) positive, and negative battery terminals (contacts) intentionally, or unintentionally.
  • Never charge the battery over 4.25V (properly charged li-ion battery is 4.2 Volts / full charge).
  • Do not reverse the positive (+) and negative (-) terminals when charging, or using the battery.
  • Never charge the battery at a current exceeding manufacturer-specified charging current.
  • Do not expose the battery to water or salt water, or allow the battery to get wet.
  • You must verify polarity before connecting the battery to the host device (or charger).
  • Never completely discharge the Li-ion battery ( below 2.5V under load ).
  • After the battery is discharged-don't leave it discharged-charge battery as soon as possible (10 min. rest time).
  • It is your responsibility to determine that your charger and host device works properly.
  • On (battery electrolytes) exposure to skin, flush with water immediately.
  • If eye exposure occurs, flush with water for 15 minutes, and seek emergency care immediately.


 This is unprotected Li-ion battery: intended for Experiences Li-ion users.

What is short circuit?
The situation when battery positive (+) and negative (-) connect. The current will become extremely high because there is no resistance in the path to limit current flow. This Short circuit will result in dangerously high temperature which may cause a fire.


The use of any unprotected li-ion cylindrical battery as a stand-alone device, including with e-cigarettes, vaporizer mods or other products, constitutes a DANGEROUS misuse of the battery cells that poses a SERIOUS RISK of personal injury or property damage. These cells are only for prototyping with proper electronic protection circuits, and not for stand-alone use. 


These are high discharge current & high capacity Li-ion batteries. If mishandled or mistreated, these batteries can cause you SERIOUS INJURY. USE AT YOUR OWN RISK.


What is in the box?


  • Samsung 21700 INR2170050E rechargeable battery cell.
  • FREE 21700 battery case with each pair of batteries.
  • Safe Li-ion packaging.


Price listed is for one battery cell.

We ship very fast from Florida - USA.

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