battery-percent

C99 · Rust · Battery · MCU · 2026 - present

Battery state-of-charge estimation from discharge curves and interpolation, with ADC filtering, in C99 and no_std Rust.

Overview

A small C99 and no_std Rust library that estimates battery charge using voltage-to-state-of-charge curves. It supports several cell chemistries, series packs, and ADC smoothing without tying the implementation to a particular microcontroller. Source and curves.

Engineering approach

Charge estimation uses discharge curves and interpolation instead of a linear mapping tied to one chemistry. The library separates ADC acquisition from the computation to remain portable across microcontrollers.

Scope and limitations

Designed as a reusable library independent of one application. Refer to the upstream repository for current APIs, examples, platform constraints and supported versions.

Explore the project

Source repository, documentation or official result ↗

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