Observed arrival · 2026-10-24

Open Battery Information: browser-based Makita battery diagnostics

makita.website Visit website

Editorial interest 78/100 Selection signal · not a rating of the site

An open-source web tool for reading Makita battery BMS data through an Arduino interface and Web Serial.

Landing page captured for the 2026-10-24 issue.

For: Makita battery repairers with an Arduino Uno
Worth noticing: The listed readings include cell voltage, temperature, charge cycles, error codes, and device status.

Field notes

The workflow starts by assembling an OBI Arduino interface and following a wiring guide, then connecting the board to the OBI-1 page. The listed readings include cell voltage, temperature, charge-cycle count, and device status. The homepage describes browser-local processing and a GPL-3.0 license; its latest-release field is still shown as “checking…”.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

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