Lithium 12V Battery Resets
Lithium 12v Battery Repairs & Resets
Lithium 12v Battery System Failures
Electric vehicles use lithium-ion auxiliary (12v) batteries to power vehicle control systems, safety features, and low-voltage circuits. Unlike conventional lead-acid batteries, these require precise battery management and can enter protection modes following deep discharge, communication faults, or system errors.
Our repair service addresses battery management system (BMS) resets, cell balancing issues, and communication protocol restoration. We carry out systematic diagnostics to identify whether the fault lies with the battery pack itself, the DC-DC converter supply, or vehicle network communication. Standard procedures include BMS parameter resets, cell voltage verification, and load testing to manufacturer specifications.
Selection of Covered Vehicles - 12V Low Voltage Battery Repairs
View a selection of vehicles that have a 12V Low Voltage Battery repair solution
Audi
- Audi A4 2019-present
- Audi A5 2019-present
- Audi A6 2019-present
- Audi S4 2019-present
- Audi S5 2019-present
- Audi Q5 2019-present
BMW
- BMW X5 (plug-in hybrids) 2016-present
- BMW X5 (Mild-hybrid model) 2021-present
- BMW X7 (Mild-hybrid model) 2021-present
BYD
- BYD Atto 3 2022–present
- BYD Dolphin 2021–present
- BYD Seal 2022–present
Ferrari
- Ferrari 296 (GTB & GTS): 2021-present
- Ferrari SF90 (Stradale & Spider): 2019-present
- Ferrari F8 (Tributo & Spider): 2019-2023
- LaFerrari Coupé 2013-2016
- LaFerrari Aperta 2016-2018
Lamborghini
- Lamborghini Revuelto 2023–present
- Lamborghini Urus 2018–present
Land Rover
- Land Rover Defender 2020-present
McLaren
- McLaren MP4-12C 2011-2014
- McLaren P1 2013-2015
- McLaren 650S 2014-2017
- McLaren 570S 2015-2021
- McLaren 720S 2017-2023
- McLaren 600LT 2018-2020
Mercedes
- Mercedes A-Class 2018-present
- Mercedes C-Class 2018-present
- Mercedes E-Class 2018-present
- Mercedes S-Class 2018-present
Porsche
- Porsche Cayenne 2011-present
- Porsche 911 2024-present
- Porsche Taycan 2019-present
Range Rover
- Range Rover 2020-present
- Range Rover Sport 2019-present
- Range Rover Evoque 2019-present
Tesla
- Tesla Model S 2012–present
- Tesla Model X 2015–present
- Tesla Model Y 2019–present
- Tesla Model 3 2017–present
Can't find your vehicle?
The vehicles listed are a selection of 12V Low Voltage Battery Repairs. Please contact us if your vehicle is not listed.
Call us
Email Us
Common Symptoms
Vehicle Won't Enter Ready Mode
Battery voltage insufficient to initialise vehicle systems. High-voltage system remains offline despite charging attempts.
Intermittent Electrical Faults
Random warning messages, infotainment system resets, or loss of power steering/braking assistance whilst driving.
Battery Management Warning Messages
BMS error codes indicating cell voltage imbalance, communication loss, or battery protection mode activation.
DC-DC Converter Faults
12v system voltage fluctuations or failure to maintain charge from the high-voltage traction battery supply.
Vehicles Affected
Vehicles most likely to require a lithium 12 V battery reset are those that:
- Heavily integrate the 12 V battery into vehicle control, BMS communication, and DC‑DC converter logic
- Are EVs or hybrid/plug‑in hybrids, especially newer platforms (approximately 2019‑present)
- Very common examples include Tesla Model S (refresh models 2021+), Model 3, Model X (refresh models) & Model Y
- More common examples include Hyundai Ioniq 5
Hyundai Ioniq 6, Hyundai Kona Electric (newer models), Kia EV6, Kia Niro EV (latest generations), Genesis GV60
What's Included?
Comprehensive System Diagnostics
Full diagnostic scan covering battery management system, DC-DC converter operation, and vehicle network communication. Fault code analysis using manufacturer-level diagnostic equipment to identify root cause rather than symptoms.
BMS Reset & Reprogramming
Battery management system parameter reset and recalibration where appropriate. Cell voltage balancing verification and correction of protection mode states. Communication protocol restoration between battery controller and vehicle systems.
Load Testing & Verification
Systematic load testing to verify battery capacity and internal resistance. Assessment of charge/discharge characteristics under simulated vehicle loads.
DC-DC Converter Testing
Supply voltage verification from high-voltage system to 12v network. Ripple and regulation testing to identify converter faults affecting battery charging. Isolation and identification of upstream or downstream fault conditions.
All work is backed by a 12-month warranty covering both parts and labour, giving you peace of mind and confidence in the quality of our service.
Absolutely fantastic firm to deal with 5 star customer service from the team. After Absolutely terrible service from tesla with our Model S LKQ Electriq came to the rescue we will 100 % recommend them tesla could learn a thing or two from this company. Big thank you from Chris and sab.