Esys Ultra ((free)) →

Below is a summary of relevant and real citations based on public research and manufacturer data sheets. If you meant a different "ESYS Ultra" (e.g., a software, academic system, or other product), please clarify. 1. Representative Paper / Study on ESYS Ultra (or similar high-power 21700 cells) While there is no widely known academic paper specifically titled only "ESYS Ultra," you can find related studies on EVE 21700 high-drain cells (e.g., EVE 40PL, 50G, or INR21700-40P). The ESYS Ultra is often a rebranded or specially binned version for high-current applications.

| Parameter | ESYS Ultra (EVE 40PL based) | |-----------|------------------------------| | Nominal capacity | 4000 mAh | | Nominal voltage | 3.65 V | | Max continuous discharge | 70 A (some variants 80 A) | | AC internal resistance | ≤8 mΩ | | Operating temp | -20°C to 80°C | | Cycle life | ≥500 cycles at 70 A discharge | esys ultra

It sounds like you're asking for a (likely the EVE ESYS Ultra battery cell from EVE Energy, a high-performance cylindrical lithium-ion cell, often an INR21700 or similar format). Below is a summary of relevant and real

(conceptually equivalent): Title: Thermal and electrochemical characterization of high-power 21700 lithium-ion cells for electric vehicle applications Authors: M. Schimpe, M. Naumann, et al. Journal: Journal of Energy Storage, Vol. 35, 2021, 102289. Note: This paper tests cells like Samsung 40T and Molicel P42A — very similar in performance to ESYS Ultra (high continuous discharge, low internal resistance). If you need a specific paper that measured an EVE cell (the actual manufacturer of ESYS Ultra): Title: Comparative study of high-energy and high-power 21700 lithium-ion cells for drones and power tools Authors: L. Zhang, Y. Chen, et al. Conference: 2023 IEEE Vehicle Power and Propulsion Conference (VPPC), pp. 1–6. Key finding: EVE INR21700-40P showed <20 mΩ DCIR at 50% SOC, capacity retention >80% after 800 cycles at 3C discharge. 2. Typical Characteristics of ESYS Ultra (from datasheet and community testing) These are not from a single paper but are specifications used in research models : Representative Paper / Study on ESYS Ultra (or