Rincell

What Rincell does

Rincell Corporation is a privately held US battery cell manufacturer founded in 2023 and headquartered in Fremont, California, with related operations in San Francisco. The company designs and produces advanced silicon-graphite lithium-ion and sodium-ion battery cells in cylindrical 18650 and 21700 formats. Its core product line comprises the RC41 (4.1Ah 18650), RC58 (5.8Ah 21700), and RC50 (5Ah/5C 21700) silicon-graphite lithium-ion cells, plus extreme high-power 18650 sodium-ion cells. Published specifications include >300 Wh/Kg and >800 Wh/L energy density, >800 cycle life, 0-80% charge in under 20 minutes, and -40°C low-temperature discharge capability. Volume production is currently shipped from Asia, with US manufacturing slated for 2H'2027.

Rincell's go-to-market is direct B2B enterprise sales targeting government/defense and commercial customers, supported by strategic partnerships with system integrators and OEMs. Named or logo-disclosed counterparties include the US Department of Defense, Inventus Power, EXO Charge (STUB 2.0 tactical battery platform), First Breach (US drone manufacturing), Re:Build Manufacturing (battery packs), and Nash Energy (India NMC manufacturing), with additional logos such as NASA, IQT, Xentris, and Bren referenced on the company's website. The company emphasizes a domestic and allied manufacturing footprint aligned with defense supply-chain security preferences.

The business model is hardware sales of cells, with revenue generated through sample shipments and emerging volume orders; pricing is not publicly disclosed and is likely quote-based B2B contracting. Rincell has raised $1.2M in seed funding (January 2024, led by NextGen Battery Chem Ventures LLC) and a $3M California manufacturing grant (August 2024), for ~$4.2M of total capital. Leadership includes Co-founder & CEO Jignesh Parikh, Co-founder & Chief Scientific Advisor Dr. Jagjit Nanda, and CTO Dr. Lasantha Korala. The company has 1-10 employees and no disclosed revenue.

Name

Rincell

Legal name

Rincell Corporation

Website

https://rincell.com

Company type

Private

Founded year

2023

Operating status

Operating

Headcount range

1–10 employees

Short description

Rincell Corporation manufactures silicon-graphite lithium-ion and sodium-ion battery cells in 18650 and 21700 cylindrical formats for defense and commercial applications, shipping from Asia with US production slated for 2H'2027.

Ownership category

akta.pro rank

Product category

Advanced Battery Cells

NAICS

Battery Manufacturing (33591)

SIC

Miscellaneous Electrical Machinery, Equipment & Supplies (3690)

akta.pro primary industry

Battery Cells (Li-ion, LFP, Sodium-ion, Lead-acid, NiMH) (IMAGAHAA)

akta.pro secondary industry

Cathode Active Materials (CAM) Manufacturing (EUAFABAB)

Keywords

• Silicon-graphite batteries
• Lithium-ion battery cells
• Sodium-ion batteries
• Cylindrical battery cells
• 18650 21700 cells

Headquarters

HQ city

San Francisco

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Technology or R&D, Supply Chain, Personnel, Operations, Marketing or Sales

Revenue model

1. Battery Cell Sales: Direct sales of silicon-graphite and sodium-ion battery cells (18650 and 21700 formats) to government and commercial customers for applications in electrified transportation, defense, and other high-impact carbon emission products.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Rincell manufactures and sells advanced Silicon-Graphite Lithium-ion and Sodium-ion battery cells in 18650 and 21700 cylindrical form factors for government and commercial customers. The portfolio includes the RC41 (4.1Ah 18650) and RC58 (5.8Ah 21700) high-capacity silicon-graphite cells, the RC50 (5Ah-5C 21700) high-power silicon-graphite cell, and 18650 Sodium-ion cells. Products are currently shipped in volume from Asia with US production slated for 2H 2027, targeting defense, drone manufacturing, and electrification applications.

Product overview

Rincell Corporation manufactures high-energy and high-power Silicon-Graphite and Sodium-ion batteries in 18650 and 21700 cylindrical form factors. The product portfolio consists of three silicon-graphite lithium-ion cells (RC41 4.1Ah 18650, RC58 5.8Ah 21700, and RC50 5Ah-5C 21700) plus Sodium-ion cells. The RC41 and RC58 are high-capacity cells focused on energy density (>300 Wh/Kg, >800 Wh/L), while the RC50 is a high-power variant optimized for 5C continuous discharge with fast charging (0-80% in <20 minutes). Sodium-ion cells provide an alternative chemistry for specific applications. Products are currently shipping in volume from Asia with US production planned for 2H'2027.

Differentiator

Problem solved

Functional benefit

Products and services

• RC41 (4.1Ah 18650 Silicon-Graphite Lithium-Ion Cell) High-capacity 4.1Ah 18650 cylindrical lithium-ion cell using Silicon-Graphite chemistry. Delivers >300 Wh/Kg and >800 Wh/L energy density, 3C discharge capability, >800 cycle life, 0-80% charge in under 20 minutes, 2C consecutive fast charging with >600 cycles, and -40°C low temperature discharge. UN38.3 certified.
• RC58 (5.8Ah 21700 Silicon-Graphite Lithium-Ion Cell) High-capacity 5.8Ah 21700 cylindrical lithium-ion cell using Silicon-Graphite chemistry, delivering >300 Wh/Kg energy density and >800 Wh/L for enhanced energy storage applications. Designed for applications requiring higher capacity in the larger 21700 form factor.
• RC50 (5Ah-5C 21700 Silicon-Graphite Lithium-Ion Cell) High-power 5Ah 21700 cylindrical lithium-ion cell with Silicon-Graphite chemistry, offering 5C continuous discharge capability for high-power applications requiring rapid charge and discharge cycles. Targeted at power-dense use cases.
• 18650 Sodium-Ion Battery Cells Extreme high-power 18650 Sodium-ion cells providing an alternative non-lithium-ion battery chemistry for applications requiring alternative chemistries, offered alongside Rincell's Silicon-Graphite Lithium-Ion cell portfolio.

Quantifiable outcome

• >300 Wh/Kg and >800 Wh/L energy density
• +4 more outcomes

Named customers5 records

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Four partnerships are on record, tiered flagship and core.

• First BreachflagshipStrategic or Co-development Partner · 1 January 2026Strategic partnership to accelerate US drone manufacturing with American-made, highest-energy-performance batteries. Combines First Breach's drone expertise with Rincell's battery technology.
• EXO ChargecoreStrategic or Co-development Partner · 1 September 2025EXO Charge selected Rincell's high-performance RC41 cell to power the next-gen Small Tactical Universal Battery (STUB) 2.0 platform for defense applications.
• Nash EnergycoreStrategic or Co-development Partner · 1 July 2025Partnership to manufacture NMC (Nickel Manganese Cobalt) cells in India, expanding Rincell's manufacturing footprint and product portfolio.
• Re:Build ManufacturingcoreStrategic or Co-development Partner · 1 December 2024Partnership to deliver industry-leading battery packs powered by Rincell's ultra-high-capacity silicon-graphite lithium-ion batteries.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Enovix Corporation: Enovix develops high-energy-density lithium-ion cells using a 100% active silicon anode architecture, targeting consumer electronics and mobility. It competes with Rincell for high-energy-density cell design wins.
• Amprius Technologies: Amprius manufactures silicon-anode lithium-ion cells (including 18650 and pouch formats) with industry-leading energy density and has a similar government/defense customer focus, making it the closest publicly traded analog to Rincell.
• Microvast Holdings: Microvast manufactures specialty lithium-ion cells and packs for commercial vehicles, defense, and industrial applications, with US manufacturing footprint. Comparable to Rincell in defense/industrial targeting and cylindrical/pouch cell manufacturing.
• K2 Energy Solutions: K2 Energy manufactures specialty cylindrical and prismatic lithium-ion cells for defense, medical, and industrial applications, including 18650 formats — directly comparable form factor and customer base to Rincell.

Emerging players

• Sila Nanotechnologies: Sila produces silicon-anode battery materials (Moses Lake facility) that licensees like Mercedes and Panasonic integrate into cells. It overlaps with Rincell's silicon-anode chemistry focus but operates upstream in the materials layer.
• Group14 Technologies: Group14 manufactures silicon-carbon anode materials (SCC55) used by cell makers including Porsche and others. It is an emerging player in the same silicon-graphite chemistry supply chain that Rincell depends on.
• Natron Energy: Natron is the leading US-based sodium-ion battery cell producer, focused on data center backup and industrial applications. It is the most direct sodium-ion competitor to Rincell's 18650 sodium-ion sampling effort.
• Altris: Altris develops sodium-ion battery cells and cathode materials using Prussian blue analogues, targeting grid storage and mobility. Comparable to Rincell as an emerging sodium-ion cell developer.

Broad incumbents

• Panasonic Energy: Panasonic Energy is the dominant supplier of 18650/21700 cells (Tesla program) and is now scaling silicon-blended chemistries. It is the broad incumbent whose roadmap sets the performance benchmark Rincell must exceed.
• EVE Energy: EVE Energy is a major Chinese cylindrical and prismatic Li-ion cell manufacturer serving automotive, ESS, and industrial customers. Comparable to Rincell as the type of incumbent currently shipping high-volume cylindrical cells that Rincell must differentiate against.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Rincell