Captery Ultra Batteries: Supercapacitor Technology and Long Lifespan

The Italian startup "Captery" is launching what it calls "the best battery in the world," the Captery Ultra supercapacitor battery. These innovative batteries are available in AA and AAA sizes, featuring exceptional fast-charging capabilities in under three minutes (just 160 seconds), in addition to an extraordinary lifespan extending over decades of continuous use.

Supercapacitor Technology and its Advantages

Captery Ultra batteries rely on advanced supercapacitor technology, which fundamentally differs from the traditional chemistry used in Lithium-ion (Li-ion) or Nickel-metal hydride (NiMH) batteries. Instead of chemical reactions occurring inside conventional batteries, supercapacitors store energy electrically on the surface of materials, giving them an ultra-fast charging and discharging capability (10 times more efficient in power delivery FutureBridge, 2025-03-05, and sometimes up to 1000 times faster in charging than similar batteries Arrow.com, 2025-04-07).

Although the energy density of supercapacitors is lower compared to traditional batteries, meaning they store less energy per unit weight or volume Knowles Capacitors, 2024-09-19, this design allows for a much longer lifespan. They can withstand an almost unlimited number of charge and discharge cycles without the degradation that limits standard batteries. Captery claims its product offers a 500 times longer cycle life than traditional rechargeable cells, maintaining fundamental voltage for decades FutureBridge, 2025-03-05.

Environmental Sustainability of Captery Ultra Batteries

In addition to superior performance, Captery Ultra batteries boast high environmental sustainability. Their cells are built using 90% more sustainable materials compared to traditional options AZoNano, 2023-08-01.

The company aims to address the environmental pollution problem caused by billions of batteries discarded in landfills annually, which generate hundreds of thousands of tons of toxic waste. Captery thus offers an innovative solution for reducing environmental impact.

Voltage and Dedicated Charging

The Captery Ultra battery offers a stable voltage of 3.2 volts, making it suitable for powering most consumer electronic devices that typically require two 1.5-volt batteries.

However, to maintain its efficiency and long lifespan, it must be charged using the dedicated S-Charge Plus charger, as using traditional Lithium or NiMH battery chargers may damage the cells. This charger supports both AA and AAA models, and a special adapter is available for smaller formats.

Applications and Crowdfunding Campaign

Captery Ultra batteries are ideal for use in most devices that require two or more cells, such as remote controls, gaming devices, and wireless keyboards. Users can also utilize Captery’s Bridge accessory to integrate new cells with older ones, contributing to extended lifespan and enhanced energy balance.

The company is currently undergoing a successful crowdfunding campaign on Kickstarter, having significantly exceeded its funding goal. The campaign offers a variety of support levels, including a Standard Ultra Kit priced at €54 (approximately $63), which includes free worldwide shipping. This basic package includes an S-Charger Plus charger, a Captery AA Ultra 3V battery, a Captery AAA Ultra 3V battery, and two Captery Bridge accessories for AA and AAA batteries, with an option to add additional accessories. Captery also plans to produce a 1.5-volt version to provide compatibility with devices that require a single battery slot, pending further funding.

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