Samsung INR21700-48X

Samsung Battery Cell

High-capacity 21700 cell from Samsung SDI. 4800mAh capacity with 9.6A continuous discharge. Samsung's successor to the 50E line with improved energy density while maintaining similar discharge capability. Appearing in newer EUC and high-end e-bike packs. Not yet widely available at US cell retailers.

In brief: 21700 Li-ion battery cell. 4800mAh capacity. 8A continuous discharge.

Specs verified Jun 23, 2026

Reviews

No reviews yet — be the first to share your experience.

Sign in with Google to leave a review.

Specifications

Cell Specs

Form Factor: 21700
Chemistry: Li-ion
Capacity: 4800mAh
Continuous Discharge: 8.00A
Peak Discharge: 14.40A

Physical

Weight: 68 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 INR21700-48X: 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 x 70.6 mm</td> </tr> <tr> <td>Weight</td> <td style="text-align:right">67.9 g</td> </tr> <tr> <td>Capacity<br> <span class="collapseomatic noarrow" id="id699f678da0b86" tabindex="0" alt="definition" title="definition">definition</span><span id="swap-id699f678da0b86" alt="'close'" class="colomat-swap" style="display:none;">close</span><div id="target-id699f678da0b86" 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 0.48A (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> 4.80 Ah<br> <span style="font-size: 10px">C/10</span> 4.73 Ah</td> </tr> <tr> <td>Current<br> <span class="collapseomatic noarrow" id="id699f678da0bfc" tabindex="0" alt="definition" title="definition">definition</span><span id="swap-id699f678da0bfc" alt="'close'" class="colomat-swap" style="display:none;">close</span><div id="target-id699f678da0bfc" 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> 8.33 A<br> <span style="font-size: 10px">peak</span> 19.9 A</td> </tr> <tr> <td>Energy<br> <span class="collapseomatic noarrow" id="id699f678da0c3f" tabindex="0" alt="definition" title="definition">definition</span><span id="swap-id699f678da0c3f" alt="'close'" class="colomat-swap" style="display:none;">close</span><div id="target-id699f678da0c3f" 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 0.48A (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> 17.3 Wh</td> </tr> <tr> <td>Power<br> <span class="collapseomatic noarrow" id="id699f678da0c7b" tabindex="0" alt="definition" title="definition">definition</span><span id="swap-id699f678da0c7b" alt="'close'" class="colomat-swap" style="display:none;">close</span><div id="target-id699f678da0c7b" 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> 29.2 W<br> <span style="font-size: 10px">peak</span> 72.8 W</td> </tr> <tr> <td>Energy Density<br> <span class="collapseomatic noarrow" id="id699f678da0cb6" tabindex="0" alt="definition" title="definition">definition</span><span id="swap-id699f678da0cb6" alt="'close'" class="colomat-swap" style="display:none;">close</span><div id="target-id699f678da0cb6" 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> 256 Wh/kg<br> <span style="font-size: 10px">volumetric</span> 713 Wh/l</td> </tr> <tr> <td>Power Density<br> <span class="collapseomatic noarrow" id="id699f678da0cef" tabindex="0" alt="definition" title="definition">definition</span><span id="swap-id699f678da0cef" alt="'close'" class="colomat-swap" style="display:none;">close</span><div id="target-id699f678da0cef" 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> 1.07 kW/kg<br> <span style="font-size: 10px">volumetric</span> 2.99 kW/l</td> </tr> </tbody> </table>

Frequently Asked Questions

We use cookies for analytics. Privacy Policy