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What is a Lithium-ion capacitor?

Hacker News Top · 5d ago Cached

This article explains what a lithium-ion capacitor is, its features (fast charge/discharge, long life), and compares it to other power storage devices like lithium-ion batteries and EDLCs, highlighting JTEKT's Libuddy model.

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#capacitor

Show HN: Capacitor Alarm Clock

Hacker News Top · 2026-06-14 Cached

An ESP32-powered alarm clock that wakes you up by discharging a capacitor through a loud bang. The project includes a custom PCB, 3D printed case, and web interface for configuration.

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