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Samsung INR21700-50E

In brief: 21700 Li-ion battery cell. 5000mAh capacity. 9.8A continuous discharge. From $6 across 2 sellers.

Specs verified Jul 23, 2026

Price History

Price History
Price changes tracked by the crawler

Current best price $5.99. Over the past 90 days: low $5.99, high $5.99, average $5.99 — about average.

  • 18650 Battery
  • 18650 Battery Store
  • IMR Batteries
May 12May 19May 26Jun 2Jun 9Jun 16Jun 23Jun 30Jul 7Jul 14Jul 21$3.00$4.00$5.00$6.00$7.00
All Records
75 price records in this period
DatePriceShippingTotalChangeCouponRatingSalesIn StockStatus
18650 Battery(32 records)
Jul 27, 202609:00 AM$5.99$5.99$0.00Yesactive
Jul 23, 202609:00 AM$5.99$5.99$0.00Yesactive
Jul 21, 202609:00 AM$5.99$5.99$0.00Yesactive
Jul 15, 202609:18 AM$5.99$5.99$0.00Noactive
Jul 9, 202609:00 AM$5.99$5.99$0.00Yesactive
Jul 7, 202609:00 AM$5.99$5.99$0.00Yesactive
Jul 5, 202609:00 AM$5.99$5.99$0.00Yesactive
Jul 1, 202609:00 AM$5.99$5.99$0.00Yesactive
Jun 29, 202609:00 AM$5.99$5.99$0.00Yesactive
Jun 27, 202609:00 AM$5.99$5.99$0.00Yesactive
Jun 23, 202609:00 AM$5.99$5.99$0.00Yesactive
Jun 21, 202609:00 AM$5.99$5.99$0.00Yesactive
Jun 19, 202609:00 AM$5.99$5.99$0.00Yesactive
Jun 15, 202609:00 AM$5.99$5.99$0.00Yesactive
Jun 13, 202609:00 AM$5.99$5.99$0.00Yesactive
Jun 12, 202609:00 AM$5.99$5.99$0.00Yesactive
Jun 9, 202609:26 AM$5.99$5.99$0.00Yesactive
Jun 7, 202609:27 AM$5.99$5.99$0.00Yesactive
Jun 5, 202611:58 AM$5.99$5.99$0.00Yesactive
Jun 3, 202609:00 AM$5.99$5.99$0.00Yesactive
Jun 2, 202609:00 AM$5.99$5.99$0.00Yesactive
May 31, 202609:00 AM$5.99$5.99$0.00Yesactive
May 29, 202609:00 AM$5.99$5.99$0.00Yesactive
May 27, 202609:00 AM$5.99$5.99$0.00Yesactive
May 25, 202609:00 AM$5.99$5.99$0.00Yesactive
May 23, 202609:00 AM$5.99$5.99$0.00Yesactive
May 21, 202609:00 AM$5.99$5.99$0.00Yesactive
May 19, 202609:00 AM$5.99$5.99$0.00Yesactive
May 18, 202609:00 AM$5.99$5.99$0.00Yesactive
May 16, 202609:00 AM$5.99$5.99$0.00Yesactive
May 14, 202609:00 AM$5.99$5.99$0.00Yesactive
May 12, 202609:00 AM$5.99$5.99InitialYesactive
18650 Battery Store(27 records)
Jul 23, 202609:01 AM$5.99$5.99$0.00Yesactive
Jul 15, 202612:37 PM$5.99$5.99$0.00Noactive
Jul 9, 202609:01 AM$5.99$5.99$0.00Yesactive
Jul 7, 202609:01 AM$5.99$5.99$0.00Yesactive
Jul 5, 202609:01 AM$5.99$5.99$0.00Yesactive
Jul 1, 202609:01 AM$5.99$5.99$0.00Yesactive
Jun 29, 202609:01 AM$5.99$5.99$0.00Yesactive
Jun 27, 202609:01 AM$5.99$5.99$0.00Yesactive
Jun 23, 202609:01 AM$5.99$5.99$0.00Yesactive
Jun 21, 202609:00 AM$5.99$5.99$0.00Yesactive
Jun 18, 202609:25 AM$5.99$5.99$0.00Yesactive
Jun 13, 202609:00 AM$5.99$5.99$0.00Yesactive
Jun 9, 202604:01 PM$5.99$5.99$0.00Yesactive
Jun 7, 202603:59 PM$5.99$5.99$0.00Yesactive
Jun 3, 202610:50 AM$5.99$5.99$0.00Yesactive
Jun 2, 202609:00 AM$5.99$5.99$0.00Yesactive
May 31, 202610:37 AM$5.99$5.99$0.00Yesactive
May 29, 202609:00 AM$5.99$5.99$0.00Yesactive
May 27, 202609:00 AM$5.99$5.99$0.00Yesactive
May 25, 202609:00 AM$5.99$5.99$0.00Yesactive
May 23, 202609:00 AM$5.99$5.99$0.00Yesactive
May 21, 202609:00 AM$5.99$5.99$0.00Yesactive
May 19, 202609:00 AM$5.99$5.99$0.00Yesactive
May 18, 202609:00 AM$5.99$5.99$0.00Yesactive
May 16, 202609:00 AM$5.99$5.99$0.00Yesactive
May 14, 202609:00 AM$5.99$5.99$0.00Yesactive
May 12, 202609:00 AM$5.99$5.99InitialYesactive
IMR Batteries(16 records)
Jul 22, 202606:52 PM$5.99$5.99$0.00Noactive
Jul 9, 202606:30 PM$5.99$5.99$0.00Yesactive
Jun 30, 202610:10 AM$5.99$5.99$0.00Yesactive
Jun 21, 202612:05 PM$5.99$5.99$0.00Yesactive
Jun 12, 202611:07 AM$5.99$5.99$0.00Yesactive
Jun 2, 202610:07 AM$5.99$5.99$0.00Yesactive
May 29, 202610:02 AM$5.99$5.99$0.00Yesactive
May 27, 202610:00 AM$5.99$5.99$0.00Yesactive
May 25, 202601:35 PM$5.99$5.99$0.00Yesactive
May 23, 202610:02 AM$5.99$5.99$0.00Yesactive
May 21, 202609:03 AM$5.99$5.99$0.00Yesactive
May 19, 202609:04 AM$5.99$5.99$0.00Yesactive
May 18, 202609:04 AM$5.99$5.99$0.00Yesactive
May 16, 202609:03 AM$5.99$5.99$0.00Yesactive
May 14, 202609:03 AM$5.99$5.99$0.00Yesactive
May 12, 202609:03 AM$5.99$5.99InitialYesactive

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Specifications

Cell Specs

Form Factor
21700
Chemistry
Li-ion
Capacity
5000mAh
Continuous Discharge
9.80A

Physical

Weight
69 g
Dimensions (L×W×H)
71mm × 21mm × 21mm

Resources

Official Batemo Page

Manufacturer Page<p>Get everything you need for the lithium-ion battery cell Samsung INR21700-50E: Extensive measurement data in the total operation regime, a high-precision, physical battery model with global validity, and a teardown report that contains all details about materials and microstructures.</p> <table> <colgroup> <col width="50%"> <col width="50%"> </colgroup> <tbody> <tr> <td>Cell Origin</td> <td style="text-align:right">purchased on free market</td> </tr> <tr> <td>Cell Format</td> <td style="text-align:right">21700</td> </tr> <tr> <td>Dimen­sions</td> <td style="text-align:right">21.1 x 70.7&nbsp;mm</td> </tr> <tr> <td>Weight</td> <td style="text-align:right">69.0 g</td> </tr> <tr> <td>Capacity<br> <span class="collapseomatic noarrow" id="id699f6ae4d6504" tabindex="0" alt="definition" title="definition">defin­i­tion</span><span id="swap-id699f6ae4d6504" alt="'close'" class="colomat-swap" style="display:none;">close</span><div id="target-id699f6ae4d6504" class="collapseomatic_content collapsible_orange"> The nominal capacity origi­nates from the manufac­tur­er’s data sheet, if avail­able. When the data sheet is unavail­able, the nominal capacity is estimated. Batemo measured the C/10 capacity by discharging the cell at an ambient temper­a­ture of 25°C from 100% with a constant current of 0.50A (0.1C) until reaching the voltage of 2.5V. The thermal boundary condi­tion is free convection.<br> </div></td> <td style="text-align:right"> <span style="font-size: 10px">nominal</span>&nbsp;5.00 Ah<br> <span style="font-size: 10px">C/10</span>&nbsp;4.93 Ah</td> </tr> <tr> <td>Current<br> <span class="collapseomatic noarrow" id="id699f6ae4d658f" tabindex="0" alt="definition" title="definition">defin­i­tion</span><span id="swap-id699f6ae4d658f" alt="'close'" class="colomat-swap" style="display:none;">close</span><div id="target-id699f6ae4d658f" class="collapseomatic_content collapsible_orange"> All quanti­ties are measure­ment results from the Batemo battery labora­tory.<br> The contin­uous current is the highest current that completely discharges the cell without overheating it. There­fore, the cell is discharged from 100% state of charge (SOC) at an ambient temper­a­ture of 25°C with a constant current until a residual state of charge of 10% and either the lower voltage limit of 2.5V or 90% of the maximum surface temper­a­ture (54°C) is reached.<br> The peak current is the current that the cell can supply for 5 minutes. The cell is there­fore discharged from 100% SOC at an ambient temper­a­ture of 25°C with a constant current until it reaches either the lower voltage limit of 2.5V or the maximum surface temper­a­ture of 60°C after 5 minutes. For cells that reach the maximum surface temper­a­ture, the measured current is taken directly as the peak current. For cells that do not reach the maximum surface temper­a­ture after 5 minutes because they reach the lower voltage limit first, the measured current is multi­plied by a correc­tion factor that estimates the current that would have heated the cell to the maximum surface temper­a­ture within 5 minutes.<br> The thermal boundary condi­tion is free convec­tion. These operating conditions may be outside the cell manufacturer’s specification.<br> </div></td> <td style="text-align:right"> <span style="font-size: 10px">contin­uous</span>&nbsp;8.57 A<br> <span style="font-size: 10px">peak</span>&nbsp;17.0 A</td> </tr> <tr> <td>Energy<br> <span class="collapseomatic noarrow" id="id699f6ae4d65e2" tabindex="0" alt="definition" title="definition">defin­i­tion</span><span id="swap-id699f6ae4d65e2" alt="'close'" class="colomat-swap" style="display:none;">close</span><div id="target-id699f6ae4d65e2" class="collapseomatic_content collapsible_orange"> Batemo measured the C/10 energy by discharging the cell at an ambient temper­a­ture of 25°C from 100% with a constant current of 0.50A (0.1C) until reaching the voltage of 2.5V. The thermal boundary condi­tion is free convection.<br> </div></td> <td style="text-align:right"> <span style="font-size: 10px">C/10</span>&nbsp;18.0 Wh</td> </tr> <tr> <td>Power<br> <span class="collapseomatic noarrow" id="id699f6ae4d662d" tabindex="0" alt="definition" title="definition">defin­i­tion</span><span id="swap-id699f6ae4d662d" alt="'close'" class="colomat-swap" style="display:none;">close</span><div id="target-id699f6ae4d662d" class="collapseomatic_content collapsible_orange"> All quanti­ties are measure­ment results from the Batemo battery labora­tory.<br> The contin­uous power is the highest power that completely discharges the cell without overheating it. There­fore, the cell is discharged from 100% state of charge (SOC) at an ambient temper­a­ture of 25°C with a constant current until a residual state of charge of 10% and either the lower voltage limit of 2.5V or 90% of the maximum surface temper­a­ture ( 54°C) is reached.<br> The peak power is the power the cell can supply for 5 minutes. The cell is there­fore discharged from 100% SOC at an ambient temper­a­ture of 25°C with a constant current until it reaches either the lower voltage limit of 2.5V or the maximum surface temper­a­ture of 60°C after 5 minutes. For cells that reach the maximum temper­a­ture limit, the measured power is directly taken as peak power. For cells that do not reach the maximum surface temper­a­ture after 5 minutes because they reach the lower voltage limit first, the measured power is multi­plied by a correc­tion factor that estimates the power that would have heated the cell to the maximum surface temper­a­ture within 5 minutes.<br> The thermal boundary condi­tion is free convec­tion. These operating conditions may be outside the cell manufacturer’s specification.<br> </div></td> <td style="text-align:right"> <span style="font-size: 10px">contin­uous</span>&nbsp;29.2 W<br> <span style="font-size: 10px">peak</span>&nbsp;59.7 W</td> </tr> <tr> <td>Energy Density<br> <span class="collapseomatic noarrow" id="id699f6ae4d6675" tabindex="0" alt="definition" title="definition">defin­i­tion</span><span id="swap-id699f6ae4d6675" alt="'close'" class="colomat-swap" style="display:none;">close</span><div id="target-id699f6ae4d6675" class="collapseomatic_content collapsible_orange"> The energy densi­ties result from the C/10 energy, the cell weight and the cell volume.<br> </div></td> <td style="text-align:right"> <span style="font-size: 10px">gravi­metric</span>&nbsp;261 Wh/kg<br> <span style="font-size: 10px">volumetric</span>&nbsp;730 Wh/l</td> </tr> <tr> <td>Power Density<br> <span class="collapseomatic noarrow" id="id699f6ae4d66be" tabindex="0" alt="definition" title="definition">defin­i­tion</span><span id="swap-id699f6ae4d66be" alt="'close'" class="colomat-swap" style="display:none;">close</span><div id="target-id699f6ae4d66be" class="collapseomatic_content collapsible_orange"> The power densi­ties result from the peak power, the cell weight and the cell volume.<br> </div></td> <td style="text-align:right"> <span style="font-size: 10px">gravi­metric</span>&nbsp;865 W/kg<br> <span style="font-size: 10px">volumetric</span>&nbsp;2.41 kW/l</td> </tr> </tbody> </table>

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