Micro Battery Market

The global micro battery market size was USD 3.20 Billion in 2025 and is expected to register a revenue CAGR of 11.5% during the forecast period. Market revenue growth is supported by continued demand from hearing aids, medical devices, wearables and IoT sensors, with VARTA AG remaining the largest disclosed dedicated micro battery manufacturer through its Micro Batteries, Lithium-Ion CoinPower, Consumer Batteries and Energy Storage Systems segments, following a EUR 60 million liquidity boost and strategic realignment completed in April 2025. Alongside established button and coin cell suppliers, next-generation solid-state micro battery developers are reaching first commercial shipments: Ilika plc announced initial shipments of its Stereax M300 micro-battery in December 2025 from its manufacturing partnership with Cirtec Medical in Massachusetts, targeting miniature medical implants and industrial IoT sensors under a ten-year manufacturing agreement signed in August 2023. These are some of the key factors driving revenue growth of the market.

Button and coin cell manufacturers, thin-film and solid-state micro battery developers, and micro lithium-ion rechargeable cell suppliers are the commercial categories that constitute the micro battery market, with hearing aid, medical implant and industrial IoT customers requiring millimetre-scale form factors that conventional lithium-ion cylindrical and pouch cells cannot practically achieve. For instance, in July 2026, VARTA Microbattery GmbH, Germany, introduced tool-free child-resistant packaging for its hearing aid batteries in the US market, replacing scissors-required designs while continuing to meet applicable US safety standards for button and coin cells, reflecting the company's continued investment in its legacy hearing aid battery franchise even as it pursues broader financial restructuring. Demand for miniaturised, application-specific power sources continues to expand faster than the legacy hearing aid battery category alone would suggest.

However, the micro battery market's largest established manufacturer, VARTA AG, required a EUR 60 million liquidity injection and strategic realignment in April 2025 to achieve financial stability, illustrating the margin pressure facing legacy button and coin cell producers as consumer hearing aid and household battery volumes mature in developed markets. Next-generation solid-state micro battery developers face a different constraint: Ilika plc reported total income of GBP 1.1 million for its most recent full financial year, unchanged year on year, with an adjusted EBITDA loss widening to GBP 6.2 million as the company ramps toward commercial-scale production, and does not expect meaningful royalty revenue until its 2027 financial year. These factors substantially limit micro battery market growth over the forecast period.

Based on type, the global micro battery market is segmented into button/coin cell, thin-film and solid-state, micro lithium-ion rechargeable, and other emerging formats. The button/coin cell segment commands the largest revenue share because VARTA AG's Micro Batteries segment, covering hearing aid, medical and IoT button cells, remains the single largest disclosed dedicated micro battery product line globally, built on a manufacturing base at the company's Ellwangen, Germany headquarters that has supplied hearing aid batteries for decades and continues to serve established medical device customers including Eargo, with whom VARTA has partnered for more than six years.

The thin-film and solid-state segment is expected to register a rapid revenue growth rate in the global micro battery market over the forecast period, from a small 2025 base. Ilika plc's Stereax M300 micro-battery completed manufacturing process qualification at Cirtec Medical's Massachusetts facility in November 2025 and began initial commercial shipments in December 2025, targeting active medical implants and industrial IoT sensors with a millimetre-scale, rectangular form factor the company designed to resemble an integrated circuit package, enabling direct integration with semiconductor manufacturing processes that conventional button cells cannot support.

• 01What is the global micro battery market size in 2025 and what CAGR is expected during 2026-2035?
• 02What financial restructuring did VARTA AG complete in April 2025, and which business segments does it support?
• 03What is Ilika plc's Stereax M300 micro-battery, and when did it begin commercial shipments?
• 04What manufacturing agreement does Ilika plc have with Cirtec Medical, and when was it signed?
• 05Why does the button/coin cell segment account for the largest type revenue share in the global micro battery market?
• 06Why does the thin-film and solid-state segment register the fastest revenue growth rate in the global micro battery market over the forecast period?
• 07What financial results did Ilika plc report for its most recent full financial year, and when does it expect meaningful royalty revenue?
• 08What new hearing aid battery packaging did VARTA Microbattery introduce for the US market in July 2026?
• 09What form factor advantage does Ilika's Stereax design offer for integration with semiconductor manufacturing processes?
• 10Which region leads the global micro battery market by 2025 revenue share, and why?

This report covers the global micro battery market across all major segments and geographic regions. Primary research combines panel conversations with industry experts and is cross-referenced against company annual reports and government agency data. All market size figures use 2025 as the base year with a 2026-2035 forecast period.