The BattGrade app

Test the battery. Hand over the certificate.

BattGrade turns a phone and a supported OBD2 adapter into an EV battery testing tool for inspectors, dealers and fleet teams. Use the OBDLink MX+ on Android, or a Bluetooth LE adapter such as the OBDLink CX on iPhone; MX+ support on iPhone is coming. The app reads the high voltage battery, our server recomputes and signs the result, and your customer receives the PDF certificate by email, with your company logo on it if you choose. The app is free to download, and you pay for the certificates you issue.

Android: in testing · iPhone: coming soon

Request Android access Notify me for iPhone

Coming soon toApp StoreComing soon toGoogle Play

iOS 16.4+ · Android 9+ · Bluetooth 4.0+

9:41100%

Test complete

Hyundai Ioniq 5 · 2022

91.3%

State of Health

GRADE A

BMS

method

±6

points

9 mV

cell spread

Issue certificate

The whole flow

Connect, read, certify, on the spot.

Connect a supported adapter

Pair a supported Bluetooth OBD2 adapter in seconds.

Read the battery in a few minutes

Read-only requests to the battery management system, with step-by-step progress.

Issue on the spot

Our server recomputes and signs the result, and your customer gets the PDF certificate by email.

Everything in one app

What the app does.

Works with supported Bluetooth OBD2 adapters

Reads the battery in a few minutes

Read-only: nothing is written to the car

SoH with its method and uncertainty band

Checks for uneven cells, temperatures and insulation

Signed PDF certificates

Public QR verification

Your company logo on certificates

Searchable test history

Re-send certificates anytime

12 languages

Planned: offline testing

Works with

Supported OBD2 adapters.

OBDLink MX+

Bluetooth Classic · Android today, iPhone support coming

Buy on Amazon

OBDLink CX

Bluetooth LE · iPhone and Android, the pick for iPhone

Buy on Amazon

vLinker FS

Bluetooth Classic · Android, not yet on iPhone

Buy on Amazon

Konnwei KW902

Budget pick for the Nissan Leaf · Android only

Buy on Amazon

Which adapter reads which car

Be first to get the app.

It will be free to download. Leave your email and we'll tell you the day it's in the stores.

Coming soon toApp StoreComing soon toGoogle Play

One email at launch. Nothing else.