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| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Manufacturer | Samsung SDI Co., Ltd. | Model | INR21700-53G1 |
| Cell type | Non-tube cylindrical lithium-ion cell | Nominal voltage | 3.63V |
| Standard capacity | 5140mAh min., 5300mAh typ.; 0.2C to 2.5V, RT | Rated capacity | 5140mAh min., 5300mAh typ.; 1C to 2.5V, RT |
| Typical energy | Approx. 19.24Wh, calculated | Cell weight | 70.5 ± 1.5g |
| Standard charge | 1.749A CC/CV to 4.2V, 133mA termination at RT | Normal test discharge cutoff | 2.5V |
| Charge-rate test | Up to 1C (5.3A) tested at 25°C; 95% relative capacity | Discharge-rate test | Up to 2C (10.6A) tested at 25°C; 80% relative capacity |
| Operating charge, 0–5°C ambient | 0.15C, max. 4.000V | Operating charge, 5–10°C ambient | 0.20C, max. 4.050V |
| Operating charge, 10–20°C ambient | 0.25C, max. 4.100V | Operating charge, 20–40°C ambient | 0.33C, max. 4.150V |
| Operating charge, 40–50°C ambient | 0.33C, max. 4.125V | Cell-surface temperature | Charge 0–50°C; discharge −30–60°C |
| Storage recovery at ex-factory 30% SOC | ≥80% after 1 year at −20–25°C; 3 months at −40–45°C; 1 month at −40–60°C | Shipping OCV | 3.560–3.605V |
| Cycle-life criterion | RPT ≥80% after 1000 cycles; 1.749A to 4.15V / 5.3A to 3.0V, RT | Initial AC impedance | 13.0 ± 5.0mΩ at 1kHz, 30% SOC |
| Non-tube dimensions at 30% SOC | Ø21.15 ± 0.20mm × 70.00 ± 0.15mm | Discharge overtemperature protection | Cell surface ≤65°C |
The Samsung SDI INR21700-53G1 is a non-tube 21700 lithium-ion cell intended for protected battery pack assembly. Version 1.2 specifies 5300mAh typical and 5140mAh minimum capacity, 3.63V nominal voltage and a defined 1000-cycle retention test. The operating charging guide varies both current and voltage with ambient temperature; its limits differ from the 4.2V standard capacity test. MisenBattery supports qualified business-to-business sourcing and custom pack integration subject to Samsung SDI’s applicable supply and resale terms.
Samsung SDI gives 5300mAh typical and 5140mAh minimum capacity in both its 0.2C standard-discharge and 1C rated-discharge tests at room temperature. The nominal voltage is 3.63V, corresponding to approximately 19.24Wh calculated from the typical capacity. The capacity grades and test currents matter when estimating cell count, usable energy and voltage under an actual pack load.
This version is a non-tube cell, meaning the dimensions describe the unsleeved can. At 30% state of charge, the outline drawing gives Ø21.15 ± 0.20mm across the body and 70.00 ± 0.15mm overall height; weight is 70.5 ± 1.5g. Any added sleeve, insulating ring or pack hardware changes the assembled envelope, so verify production samples before fixing holder and busbar geometry.
Samsung SDI’s operating guide specifies 0.15C at 4.000V for 0–5°C ambient, increasing in steps to 0.33C at 4.150V for 20–40°C; at 40–50°C it specifies 0.33C at 4.125V. Charging is not permitted below 0°C or above 50°C. These are operating limits. The separate 4.2V standard charge procedure is used for capacity testing and should not replace this guide in a pack charger.
At 25°C, the discharge-rate table reports 85% relative capacity at 1.5C and 80% at 2C, both to a 2.5V cutoff after standard charging. These are rate-test results, not a declared continuous-current rating. Initial AC impedance is 13.0 ± 5.0mΩ at 1kHz and 30% SOC. Pack designers should establish current, voltage-sag and temperature limits for their own application with Samsung SDI guidance.
The specification sets an RPT capacity criterion of at least 80% of initial RPT capacity after 1000 cycles at room temperature. That cycle test charges at 0.33C to 4.15V with 0.05C termination and discharges at 1C to 3.0V. It is not a 1000-cycle guarantee for 4.2V charging, deeper discharge or every pack duty cycle; keep these test conditions attached to the claim.
The cell is shipped at 3.560–3.605V, near 30% SOC. At ex-factory state, the specification gives at least 80% capacity recovery after one year at −20 to 25°C, three months at −40 to 45°C or one month at −40 to 60°C. Its separate handling guide recommends dry storage at 0–23°C and humidity below 60%, with checks before assembly.
Custom battery pack applications: MisenBattery can support qualified B2B sourcing of Samsung SDI INR21700-53G1 cells and custom pack integration for industrial and mobility systems, subject to Samsung SDI’s supply authorization and application approval. Use cell-level voltage and temperature monitoring, a suitable BMS, fusing, insulation, welded connections and protection against bare-can shorts. Samsung SDI prohibits sales to individual consumers and vape or e-cigarette use. The specification lists UN38.3 and UL1642 under safety; request the applicable documentation and confirm scope before making certification claims.
