Singapore Startup Flint Unveils Paper Batteries to Replace Toxic Cells and Slash E-Waste

Singapore-based Flint is developing paper-based batteries as a safer drop-in replacement for billions of conventional cells thrown away yearly, according to a recent Tech in Asia spotlight.

These batteries eliminate toxic metals like lithium and cobalt, addressing pollution, fire risks, and the global e-waste crisis from linear battery lifecycles.

Breakthrough Technology and Unmatched Safety

Flint's innovation uses plant-derived cellulose for anode, cathode, separator, and a water-based electrolyte with safe minerals like zinc and manganese.

Fully biodegradable and compostable, the batteries are leak-proof, non-flammable, and safe even when cut or exposed to flames without sparking or toxic emissions.

Flint's Journey: From Lab to Scaled Production

Founded by Carlo Charles, Flint raised US$2 million in seed funding and launched scaled manufacturing at an 8,000 sq ft facility in Singapore.

The company sources cellulose from local and invasive plants, enabling regional adaptability and sustainability.

Environmental Impact and Market Potential

By avoiding mining supply chains and enabling composting, Flint reduces carbon footprints and transforms electronics to circular economies.

Matching alkaline cell performance, they serve as AA/AAA replacements without device redesigns.

Strategic Partnerships and Future Roadmap

Partners including Shell, Logitech, Amazon, and Nimble are testing integrations, with CES 2026 demos and 2026 consumer launch planned.

Flint aims to expand from consumer gadgets to IoT, homes, and grids, accelerating green energy adoption worldwide.