21700 Cylindrical NCA/NCM Battery for Tesla Model 3 (2018-2026)OE#1234424-00-A

1. Product Overview

This 21700 cylindrical NCA/NCM ternary lithium-ion battery cell is a direct OEM replacement, specifically engineered for Tesla Model 3 (2018-2026) with exclusive OE part number 1234424-00-A. Adopting premium NCA/NCM dual cathode material consistent with Tesla’s original 21700 battery specifications—used in Model 3 Standard Range Plus, Long Range and Performance editions with 50-82kWh battery packs—it delivers higher energy density, more stable electrical performance and superior single-cell consistency compared to traditional 18650 cells. It perfectly matches the original battery module structure, vehicle BMS (Battery Management System), and Tesla’s proprietary liquid cooling thermal management system, widely applied for Tesla Model 3 battery pack repair, module refurbishment, capacity recovery and aftermarket replacement, complying with strict automotive-grade reliability standards and meeting B2B OEM/aftermarket demands. It is compatible with Tesla Model 3’s 350-380V battery pack system, ensuring efficient power delivery and adaptability to the supercharger network.

2. Key Features

- Exact OE replacement with part number 1234424-00-A, fully compatible with Tesla Model 3 (2018-2026) original battery packs that use 21700 cylindrical cells—the upgraded, high-efficiency cell format that replaced 18650 cells for Tesla’s mass-market Model 3.

- Standard 21700 cylindrical form factor (21mm diameter × 70mm height), equipped with premium NCA/NCM dual ternary lithium cathode material as original OEM specification—NCA/NCM chemistry balances high energy output and stable performance, tailored for Tesla Model 3’s diverse single/dual-motor powertrain configurations and various battery pack capacities.

- High energy density (305Wh/kg), supporting stable high-current discharge to meet the power demands of Tesla Model 3’s single/dual-motor systems and 50-82kWh battery pack configurations, ensuring excellent range and acceleration performance, with energy density 22% higher than traditional 18650 cells.

- Low internal resistance (≤28mΩ), ultra-low self-discharge rate and long cycle life (≥1250 cycles), ensuring long-term performance stability and reducing replacement frequency for B2B clients, aligning with Tesla’s battery durability standards and NCM/NCA battery cycle life specifications.

- Seamless adaptation to Tesla’s exclusive liquid cooling system and original BMS, guaranteeing safe operation under various harsh automotive working conditions—critical for managing the large number of 21700 cells in Model 3’s modular battery pack architecture.

- Excellent single-cell consistency, ideal for series-parallel combination in large-scale EV battery pack assembly, matching Tesla Model 3’s modular battery architecture with hundreds of 21700 cells per module, ensuring uniform energy distribution and safe operation.

- No memory effect, supporting random shallow charging and discharging, effectively extending the overall service life of the battery pack and enhancing cost-effectiveness for aftermarket users, consistent with Tesla’s battery maintenance recommendations.

- Strict automotive-grade quality control throughout the production process, meeting the high standards of Tesla’s original battery components (primarily supplied by Panasonic) and B2B OEM/aftermarket demands, complying with international safety standards.

3. Specifications

Battery Type: 21700 Cylindrical NCA/NCM Ternary Lithium Battery Cell

OE Part Number: 1234424-00-A

Compatible Vehicle: Tesla Model 3 (2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026)

Nominal Voltage: 3.7V

Nominal Capacity: 5100mAh

Charging Cut-off Voltage: 4.2V

Discharging Cut-off Voltage: 2.75V

Cell Size: 21mm (Diameter) × 70mm (Height)

Cathode Material: Nickel Cobalt Aluminum/Nickel Cobalt Manganese (NCA/NCM)

Anode Material: High-Density Artificial Graphite (silicon-carbon composite for enhanced capacity)

Continuous Discharge Rate: 1.2C

Cycle Life: ≥1250 charge-discharge cycles (80% capacity retention)

Internal Resistance: ≤28mΩ

Energy Density: 305Wh/kg

Discharge Operating Temperature: -20℃ ~ 60℃

Charge Operating Temperature: 0℃ ~ 45℃

Application: Tesla Model 3 Battery Module Repair, Pack Refurbishment, Aftermarket Replacement