Byd Battery Replacement - We Come to You
Mobile battery supply & installation at your home, work or roadside across Sydney
Batteries for BYD Atto 3 (2022–present), Dolphin (2023–present) & other models – performance-grade AGM/EFB for smart alternators, professionally installed wherever you are.
1800 79 79 77
Get the Best Deal on BYD
Batteries with Auto Hero
BYD
Battery Experts
Up to 3 Years
Battery Warranty
24 Month
Workmanship Cover
Mobile Service
We Come To You
Modern BYD EVs use both high-voltage traction batteries and a 12-volt support system that powers displays, locks, and safety modules. Auto Hero installs genuine-spec lithium or AGM support batteries tuned for Atto 3, Seal, and Dolphin, ensuring stable communication with the main pack and flawless startup.
Auto Hero — trusted by BYD owners for expert mobile battery replacement, correct specification batteries and long battery life.
Contact us now for amazing fast service and a competitive quote!
We supply batteries for all
BYD makes and models
Atto 3
Seal
Han
Dolphin
Tang
5 SIGNS YOUR BYD
battery is dying
What are BYD-specific signs of a weak battery?
BYD vehicles often show battery issues through warning messages, electrical features not responding, or the vehicle failing to power on. These symptoms are usually related to the 12V battery, not the main traction battery.
Can a weak battery affect remote entry or electronics in a BYD?
Yes. A weak 12V battery can reduce key range and cause screens, locks, climate control, or infotainment systems to stop working or behave inconsistently.
Why does my BYD crank slowly with a weak battery?
Even though BYDs are electric vehicles, the 12V battery controls startup and system activation. If it can’t supply stable voltage, the car may not wake or turn on at all.
Are there any BYD-specific issues when replacing the battery?
Using the correct 12V battery type and specification is important to ensure proper system operation. An incorrect or failing battery can trigger repeated low-voltage warnings.
What if I only hear clicking when I start my BYD?
This usually indicates the 12V battery is weakening. The alerts may clear once driving, but they are an early warning that the battery should be tested or replaced.
BYD Battery
Replacement Experts
Car Batteries Supplied, Installed & Registered to Your BYD’s Computer
Auto Hero supplies and installs premium AGM, EFB, and calcium-cell 12V auxiliary batteries for a wide range of BYD vehicles — including popular models like the Atto 3, Dolphin, and Seal — with batteries available for all BYD models.
BYD systems demand high-capacity batteries for stable power, even with the engine off.
Although BYD is best known for its EV and plug-in hybrid platforms, these vehicles still rely on a 12V auxiliary battery to power safety systems, electronics, lighting, and keyless entry — even when the main traction battery is fully charged. This means a flat 12V battery can leave your BYD completely unresponsive, despite having plenty of charge in the drive battery.
We fit high-quality AGM batteries with the correct discharge profile to work seamlessly with BYD’s DC/DC converter, ensuring the 12V system charges efficiently from the main battery pack. Our mobile service also includes full ECU registration where applicable, ensuring the system correctly recognises the new battery and maintains optimal performance.
Whether you drive the city-friendly Dolphin, the sporty Seal, or the family-sized Atto 3, we have the right battery to keep your BYD’s advanced electronics and safety systems running at their best.
Pro Tip:
Many BYD auxiliary batteries are positioned under protective panels in the boot or frunk, with some located behind access covers inside the cabin. Our technicians use insulated tools and EV-safe handling protocols to prevent damage and maintain safety during replacement.
All BYD battery replacements include up to a 3-year battery warranty plus 24 months workmanship cover. Our mobile service comes to your home, workplace, or roadside, with EV-trained technicians ready to assist.
Book your BYD
battery service today
Call 1800 79 79 77.
We come to you.
Why Choose Us?
Rapid
Response
On the job within an hour. Any vehicle, location, time.
Unbeatable
Prices
Competitive vehicle battery prices or 11% OFF
Up to 3 Years
Warranty
Nation wide warranty for genuine, well-known brands.
24/7 Service
Sydney Wide
All day, every day, all across Sydney.
Over 3,150+ Online reviews
Had a flat tyre and Matt came to the rescue. Quick call out, super friendly and he had it changed in no time. Top bloke and great service, would definitely recommend Auto Hero!
Matt went above and beyond to help navigate a difficult problem. Highly recommend to anyone needing auto service.
I really appreciate Matt’s help! He responded quickly and arrived right on time, even on short notice and in Sydney’s heavy rain. My car wasn’t starting and he helped me with a jump start straight away. Reliable, friendly, and professional. I’d definitely recommend him for any job
The service was prompt and reasonably priced. I highly recommend it!
Matt was such a nice and friendly with us and kept professionalism. We had issue with our car window which Matt explained and fixed it within few minutes. The whole process from start to finish was well explained and executive. I strongly suggest to have your car issues solved out with Matt from Auto Hero. Thank you for the service.
Matt was very helpful and efficient, replace the battery of my car in no time even explain the condition of my car for me in detail so i know what to expect and how can i take care of it better. Highly Recommended, all the best
Matt did a wonderful job repairing my tyre. From the very beginning, he had such a nice approach over the phone, answered quickly, and was very responsive. He arrived exactly at the time he said he would and fixed the tyre perfectly. Great service, reliable and professional. I highly recommend him!
Matt drove all the way out to us in Gledswood Hills and was so quick and efficient. He was beyond kind and great at what he does. Could not recommend more.
Matt was so efficient, so cost effective (a good $200 cheaper than every other quote to fix my car's side mirror), so communicative, and also just such a great guy. Even offered to give us some money back because it took less time than he thought it would. Cannot recommend him enough!
Was stranded on the road, called auto hero and in half an hour they came to check if everything was okay, helped me with my tires and also educated me on wheel alignment. Definitely will recommend them highly!??
Loved it:) The process was simple, easy and fun. Will definitely be using this service again.
Big big big thanks to Matt, I had large metal object in my tyre being a new wanted to ensure I had a professional change and inspect my tyre little did I know how easy and fast Matt was ensuring I was safe and he was on the way excellent job very great price not only did change my tyre but ensured my others were good and safe to drive , 10/10 definitely recommend giving Matt a call
BYD
BATTERY FAQ’s
What battery suits my BYD (Atto 3, Dolphin, Seal, Han, etc.)?
We confirm the exact 12 V auxiliary battery required for your BYD model based on year and variant. In EVs like BYD, the 12 V battery supports the vehicle’s low-voltage network and is separate from the high-voltage traction battery.
Can Auto Hero install my BYD 12 V battery at home, work, or roadside?
Yes. We offer full mobile installation across all Sydney suburbs, including safe handling procedures specific for EVs and hybrids.
Does my BYD require system resets or coding when replacing the 12 V battery?
Some BYD models may require system re-initialisation when the 12 V battery has been disconnected or replaced, because the vehicle’s electronics must recalibrate after power interruption. We handle those steps onsite.
Can you test the charging system to see if it is OK?
Yes. We can test the 12 V charging circuit, including the DC-DC converter and related systems to confirm whether they are correctly charging the auxiliary battery or if another component has caused it to deplete, for an additional cost.
Do you test the 12 V battery before replacing it?
Yes. We can conduct a full 12 V battery health and support-system test to verify whether the battery itself is the issue or if another system is contributing to the failure, for an additional cost.
How long does installation take?
Most 12 V battery replacements in BYD vehicles take about 15-60 minutes, depending on battery location, vehicle access and required system re-initialisation.
What warranty do Auto Hero batteries come with?
All 12 V batteries we supply include a minimum 24-month warranty, with selected premium options offering up to 3 years for an additional extended-warranty cost.
Can Auto Hero handle complex or hidden battery locations?
Yes. Many BYD models position the 12 V battery under covers or within EV-specific compartments. Our technicians are trained to access and replace them safely.
What payment methods do you accept?
We accept EFTPOS, debit and credit cards, secure online payments and tap-and-go. Buy Now Pay Later options (Afterpay, Zip Pay) are also available for eligible customers.
Do you remove and recycle the old battery?
Yes. We take away and recycle your old 12 V battery at no extra cost.
CONTACT US
If you need our service immediately, please call us on 1800 79 79 77 or leave a message and we will get back to you ASAP.
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