GoKawiilOpen Battery Information moves to browser-based tool for reviving locked BMS units
The Open Battery Information project has retired its old Python/Tkinter desktop app in favor of a new web-based interface, OBI-1, that connects directly to an Arduino or ESP32-C3 via Web Serial. The tool lets users read and reset battery management system (BMS) faults without installing any software, including flashing firmware straight from the browser.
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Many battery packs get discarded because their BMS software falsely flags a fault or locks out a battery after a temporary issue, even when the cells and electronics are still usable. By making diagnostic and repair tools free, open-source, and browser-accessible, this project lowers the technical barrier for right-to-repair advocates and hobbyists trying to extend battery lifespans and cut e-waste.
- The legacy desktop app is deprecated; the last supported version is tagged v0.2.3.
- The new OBI-1 web UI uses Web Serial to communicate with Arduino hardware, removing the need for Python installation.
- The project targets locked BMS units, aiming to prevent good batteries from being discarded due to false fault triggers.
Arduino Uno R4 Minima — The Open Battery Information web tool talks to an Arduino over Web Serial and can even flash firmware straight from the browser, so having a board on hand is step one. The Uno R4 Minima is a native USB Arduino that makes hooking into a battery BMS for diagnostics and repair straightforward. A great starting point for anyone who'd rather revive a locked pack than bin it.
See Arduino Uno R4 Minima on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: github.com, 2026-08-29
Published there as: “Open Battery Information”
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