Derives usable battery capacity from the car's own arithmetic. No adapter, no assumptions about WLTP, EPA or wheel size.
Checking…
01The car
Identify the car and set its reference capacity first. Everything below is recorded against it.
Published figures vary by market, software version and production batch. Where a year has more than one published figure, all are listed. Once you have readings from cars you trust, use those instead.
02Energy app — 200 mile view
The consumption figure, and the line beneath it comparing it to Rated.
03Battery display
Set the display to miles, not percent. Read both figures at the same moment. Above 80% charge is more accurate.
04Result
Usable capacity
—kWh
0100%
Rated constant—
Rated range at 100%—
Projected range, recent driving—
Reference capacity when new—
05Saved readings
No readings yet. Save one above and it stays on this device.