Tesla Model 3 / Model Y · Lviv, Ukraine

Lost range or got a BMS alert?
We repair your Tesla battery instead of replacing it.

We find the weak cell group and restore it instead of replacing the whole high-voltage battery. Several times cheaper, with a warranty on our work.

BMS_a066 BMS_a079 Cell imbalance Charge limited to 50%

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Tesla Model 3 — battery repair at Lemberg Car — Photo: Carlquinn, Wikimedia Commons, CC BY-SA 4.0 (cropped)

0cell groups checked one by one

0pack modules compared with each other

3 / Your focus — Tesla Model 3 and Y

✓warranty on our work

Inside the battery

Tesla Model 3 battery: 4 modules, 96 cell groups

We check every cell group separately. If one falls behind — like cell 63 in the diagram — the BMS limits the charge and range of the whole car. That is the group we find and restore.

When people come to us

Sound familiar?

If you notice even one of these, get the battery checked now — before the problem gets more expensive.

Range dropped sharply

A full charge shows noticeably fewer kilometres than before, or the percentage suddenly drops while driving.

BMS alerts on the screen

BMS_a066, BMS_a064, BMS_a079 and other battery imbalance alerts, maximum charge limited.

Charge limited or not charging

The Tesla won't charge above a certain level (often 50%), charging doesn't start, or the battery limits power.

Our diagnostics

We see every cell group, not just an error on the screen

We built our own Lemberg Car app. It shows the voltage of all 96 cell groups, the imbalance, how the battery behaves under load and its real capacity. Below are real screenshots from our diagnostics.

Voltage table of 96 cell groups across 4 modules

Cell group voltage chart with out-of-tolerance cells

Battery test while driving, module comparison

How diagnostics works →

Real examples

What cars come in with — and what they leave with

Screenshots from our app on real cars. Imbalance is the difference between the highest and the lowest cell group: the smaller, the better.

A complex case

249 mV imbalance

Sagging cells in three modules at once

One cell group dropped by 249 mV, several more by 30–53 mV in modules 2, 3 and 4. Because of this the BMS heavily limits the battery.

Chart: sagging cells in three modules, 249 mV imbalance

Module table: faulty cells in modules 2, 3 and 4

After repair

3–8 mV imbalance

A balanced battery

This is what batteries look like after our repairs: all 96 cell groups within the norm, imbalance of 3 and 8 mV.

What we do with the battery

One weak group drags the whole battery down

The BMS follows the weakest cell group and limits the charge and range of the whole car because of it. We find that group, restore it and balance the battery.

👉 Drag the slider to compare before and after the repair (illustration).

Before repair

group 1group 24

After repair

group 1group 24

◀ BeforeAfter ▶

What we do

Check your battery before the problem gets more expensive

Tell us your car model and what's wrong. We reply on Telegram, Viber and WhatsApp.

Book now Telegram

Lost range or got a BMS alert?
We repair your Tesla battery instead of replacing it.

Tesla Model 3 battery: 4 modules, 96 cell groups