LIHC0813H-4R2-35F 4.2V 35F Supercapacitor for IoT (4A Pulse / 200mA Continuous)

Product Overview

The LIHC0813H-4R2-35F is an advanced lithium-ion hybrid capacitor (LIHC) engineered to bridge the gap between traditional EDLC supercapacitors and high-energy lithium batteries. By combining a capacitive cathode based on activated carbon with a battery-type anode utilizing lithium-ion intercalation materials, this unique structure enables both non-faradaic capacitive and faradaic lithium-ion energy storage mechanisms.

The result is a powerful component that achieves a superior balance of high energy density, excellent pulse power performance, and an exceptionally long cycle life. With a rated voltage of 3.8V and a maximum charging voltage of 4.2V, this component delivers 35F of capacitance in a compact, maintenance-free cylindrical package (8mm × 13.5mm)—making it the ideal energy storage solution for low-power energy harvesting and demanding IoT hardware.

Key Specifications
The LIHC0813H-4R2-35F operates within a voltage range of 2.5V to 4.2V (3.8V rated) and provides a rated capacitance of 35F (measured between 4.2V and 2.5V @ 25±3°C). It features an AC internal resistance (ACR) of ≤ 500mΩ (1kHz, 3.6V) and a DC internal resistance (DCR) of ≤ 800mΩ under a 10ms pulse. Engineered for high-drain applications, it supports a continuous discharge current of 200mA, a maximum discharge current of 300mA, and can handle transient pulse discharge currents up to 4.0A (<1s). Additionally, it maintains excellent energy retention with a low leakage current of ≤ 3.0μA after 72 hours at 25°C.

Operating Conditions
The LIHC0813H-4R2-35F is engineered to operate reliably across a standard voltage range of 2.5V to 4.2V, with a rated voltage of 3.8V and a maximum charging voltage of 4.2V. It maintains optimal performance throughout a wide industrial operating temperature range from -40°C to 65°C. For long-term preservation and to ensure maximum shelf life before deployment, it is highly recommended to maintain storage conditions between +10°C and 40°C.

Cycle Life and Longevity
Built for maintenance-free durability, this hybrid capacitor exhibits an exceptional cycle life exceeding 8,000 cycles under standard testing conditions (measured via 10C charge/discharge cycles between 4.0V and 2.5V at room temperature). Upon completing 8,000 full cycles, the component retains at least 70% of its initial rated capacitance, while its internal resistance is guaranteed to remain within 4 times its original specified value. This ultra-low self-discharge and robust degradation resistance significantly reduce system downtime and hardware replacement frequencies in remote IoT setups.

Temperature Performance

The lithium-ion hybrid design delivers outstanding stability under extreme environmental conditions. At ultra-low temperatures as low as -20°C, the component retains at least 60% of its initial measured capacitance, with the internal resistance increasing to no more than 10 times the baseline specification. At an elevated temperature of +65°C, the overall capacitance fluctuation stays strictly within a minimal ±10% margin.

Furthermore, the hardware is highly resilient against humidity and electrical stress; subjecting the capacitor to a high-temperature, high-humidity storage test (60±3°C at 90±3% RH for 1,000 hours) yields a capacitance retention of ≥70% and keeps internal resistance under 2 times the initial value. Under a rigorous 1,000-hour high-temperature float test conducted at 65°C and 3.8V, it successfully maintains a capacitance of ≥70% and a resistance of ≤4 times its baseline value.

Physical Dimensions
The LIHC0813H-4R2-35F features a compact cylindrical form factor with a shell diameter (ΦD) of 8mm (+0.5mm max tolerance) and a body length (L) of 13.5±1.5mm. Designed for secure through-hole PCB mounting, it features staggered tinned lead terminals with a standard diameter (Φd) of 0.6±0.1mm and a pitch (P) of 3.5±0.5mm. The positive lead (L1) measures 28.5±1.0mm, and the negative lead (L2) is 22.5±1.0mm. Weighing just 1.8g maximum, the component is housed in a rugged aluminum shell sealed with a high-isolation base rubber plug to secure the internal organic electrolyte and prevent short circuits.

Construction
The LIHC0813H-4R2-35F utilizes a high-performance hybrid architecture, pairing a capacitive activated carbon cathode with a battery-type lithium-ion intercalation anode (such as pre-lithiated carbon or graphite). An ion-permeable insulating membrane serves as the separator, facilitating efficient ion transport through a specialized organic electrolyte system. The assembly is enclosed in a heavy-duty cylindrical aluminum shell and hermetically sealed with a rubber plug to eliminate leakage risks. Staggered, tinned copper-clad steel wire leads complete the design, ensuring excellent electrical conductivity and reliable solder joints under thermal stress.

Applications
The LIHC0813H-4R2-35F is an ideal energy storage solution for smart utility meters (water, gas, and electricity) and industrial IoT devices that require prolonged standby periods interspersed with intermittent high-power data transmissions. It efficiently powers wireless communication protocols, including RF, cellular, and GPS modules, by delivering the high-current bursts necessary for stable data telemetry. Additionally, it serves as a highly reliable backup power source for memory retention, critical system backup, and real-time clocks (RTC) during sudden main power interruptions. Its robust energy buffering capabilities also make it perfectly suited for peak power support in industrial automation sensors, actuators, programmable logic controllers (PLCs), portable electronics, renewable energy harvesting storage buffers, and battery-assisted pulse delivery systems.

Test Standards
This lithium-ion hybrid capacitor is developed and qualified in strict accordance with internal engineering standards, utilizing industry benchmarks derived from IEC 62831 (for lithium-ion capacitors) and IEC 62391 (for electrical double-layer capacitors). All technical evaluations are executed under controlled laboratory conditions at an ambient temperature of 25±3°C, relative humidity below 65%, and an atmospheric pressure of 1 atm. To guarantee maximum operational safety in demanding deployments, the component has successfully passed rigorous environmental and abuse testing—including overcharge, external short-circuit, thermal exposure, and mechanical stress evaluations—demonstrating zero risk of explosion or fire.