Quick answer: Your EV carries two batteries, and the one that leaves owners stranded is almost always the small one. The large battery under the floor drives the wheels. The little 12V battery runs everything else — lights, locks, computers, the systems that wake the car up — and when it goes flat, the car can sit completely unresponsive while the big battery still holds a full charge. At Desai Naka we test the 12V battery, look over the charging port, and scan the car for warning lights and fault codes. Anything involving the high-voltage pack itself goes to the brand authorised network. Autoport India Pvt Ltd is at Desai Naka, opposite Croma (SK Plaza) on Kalyan-Shilphata Road, Dombivli East, open 24x7. Call +91 72080 15250.
This page opens with a morning every EV owner in Palava or Dombivli dreads, and works backwards from it. The car was fine on Friday. On Monday it will not unlock, the screens stay black, and the traction battery — the one you charged to 80% — is not the problem at all. Once you understand why that happens, the rest of the page follows: what a check at the workshop actually involves, where a general garage stops and the brand network starts, and how to keep both batteries healthy. Our EV service guide for Dombivli and Palava covers the full service; here, the subject is only the battery — or rather, the two of them.
EV not waking up, or range dropping suddenly? Book an EV battery check at Desai Naka — open 24x7.
The morning your EV would not wake up
It usually goes like this. The car was parked on Friday evening, charged, locked, and left in the basement. Monday morning, the owner walks down, presses the unlock button, and nothing happens. No lights, no display, no response at all. The first thought is the big battery — the one that cost a fortune and decides the range. But the big battery is fine. What has gone flat is the small one, and the car cannot even wake up to use the big one.
That is the surprise most new EV owners meet sooner or later, and it is worth understanding before it happens to you. The small battery is not a backup or an accessory. It is the battery that runs the car before the car runs. Without it, the doors stay locked, the computers stay asleep, and the traction battery might as well not be there. The fix is not a high-voltage repair or a tow to the brand network — it is a test that takes a few minutes and, if needed, a replacement that any general garage can do. Knowing which battery has failed is the whole game, and the rest of this page is about telling them apart.
Meet the two batteries, side by side
| Traction battery | 12V battery | |
|---|---|---|
| Where it lives | Usually under the floor | Under the bonnet, like a petrol car's battery |
| What it powers | The motor — the driving itself | Lights, locks, computers, displays, wake-up systems |
| How it charges | At home or at a public charger | From the traction battery while the car runs |
| When it fails | Range falls, charging slows or stops, warning light, reduced power | Car will not wake up, lights dim, locks slow, screens dark |
| Who fixes it | Brand authorised network | General garage — test and swap at Desai Naka |
The relationship between the two is what catches people out. While the car runs, the big battery keeps the small one topped up. Park the car for a long stretch and the small battery drains slowly on its own, exactly as a petrol car's battery does — and if it drains flat, the car cannot wake up to recharge it. A car that stands unused for days, a hot spell, or a life of short trips all age the small battery faster. It is the same kind of battery a petrol car has, it ages the same way, and it strands EVs for the same reason it strands petrol cars: nobody thinks about it until the morning it does not work.
The first fifteen minutes at Desai Naka: what the check actually does
When an EV comes in for a battery check, the work follows a short, fixed sequence, and it is worth knowing what is in it — and what is not.
First, the small battery: its voltage is measured, its ability to hold a charge is tested, and its terminals are looked at for corrosion and for tightness. A loose or corroded terminal can mimic a dying battery, and it is a cheaper fix than a replacement. Second, the charging port: a visual look at the pins, the cover, and any sign of damage or water entry. Third, the scan: the car is read for warning lights and stored fault codes, because a light on its own does not identify the failed part. Fourth, a conversation about charging behaviour — does the car charge normally, does it stop partway through, has it started charging more slowly than it used to? How the car charges is evidence, and the mechanic needs it.
What is not in the sequence is the high-voltage pack. The pack is a sealed unit, and opening it or working on it calls for training, insulation tools and diagnostic equipment that belong to the brand authorised network. A general garage that offers to open it is offering something it should not. Our line is simple: we find the problems a general garage can genuinely fix, and we send you to the right place — with a clear written description of what we found — for the ones it cannot.
The line we will not cross — and why it protects you
The traction battery is the most expensive part of an EV, and it is also the part a general garage should not touch. That is not a limitation to apologise for; it is a boundary that protects the owner, the car and the warranty. The brand network has the diagnostic tools that can read the battery's state of health cell by cell, and the training to work on a high-voltage system safely. No general garage has either, and guessing at a high-voltage repair is how warranties get voided and cars get damaged.
So if you arrive with a traction battery symptom — a sudden fall in range, charging that stops halfway, a battery warning light — here is what happens. We scan the car, we test the small battery, we look over the charging port, and then we tell you plainly that the next step is the brand network, with a clear description of what we found. We do not open the pack, and we do not guess. That honesty is part of the service, not a gap in it.
After a long stand: the restart routine
A car that has stood for two or three weeks deserves a minute of attention before it is driven anywhere. Do not just try to start it and head off on a long drive. First, see whether it wakes up normally — lights bright, locks responding, displays alive, no warning light. If it is slow or unresponsive, ring us before trying again and again, because each attempt drains the small battery further. If it wakes up cleanly, take a short local drive before the long one, and watch for anything unusual.
The same thinking applies before a long stand, not just after one. A car going into weeks of parking deserves a check first — battery, tyres, and a note of the charge level — because the problems that appear after a stand are usually the ones that were already developing before it. Our battery replacement page covers what a failing 12V battery looks like and what a swap involves.
Reading your range like a fuel gauge
Range is the traction battery's diary, and owners should read it the way they used to read a fuel gauge — for changes, not for absolutes. A range that drifts down slowly over years is the battery ageing normally, and it is a conversation for the next service, not an emergency. A range that falls suddenly, charging that slows sharply or stops partway, or a battery warning light — those are not ageing, and they need a diagnosis.
When you call, the two facts that matter most are when the symptom started and whether it is getting worse. A sudden drop last week is a different matter from a slow drift over months, and the difference decides whether the next step is a scan at Desai Naka or a visit to the brand network. Note the numbers before you ring: the range the car showed a month ago, what it shows now, and whether charging has changed too.
Charging habits that help both batteries last
The exact guidance belongs to the owner's manual, because the advice differs for every maker and every battery. The general habits are simple enough to remember. Do not leave the car sitting at a very low charge for a long time. Do not leave it unused for weeks without checking the small battery. And pay attention to how charging behaves — if the car starts charging more slowly than it used to, or stops partway through, that is information, not an annoyance, and it is worth mentioning when you book.
One more habit, and it is the cheapest of all: keep an eye on the small battery the way you would keep an eye on a petrol car's battery. It ages faster when the car stands unused for days, when the weather is hot, or when the car is used only for short trips — and a five-minute test at a service is all it takes to know where it stands.
What a battery health check costs, and how the quote works
EV work at Autoport is always priced after the car has been seen, because the booking catalog holds no fixed price for EV battery work. We inspect first and explain the estimate before any work starts, and spare parts are billed at actuals. The 12V battery test itself takes a few minutes, and a replacement is a straightforward job, priced after inspection.
| Service | Starting price |
|---|---|
| Basic Service | Starting ₹1,859 |
| Standard Service | Starting ₹2,589 |
| Premium Service | Starting ₹4,869 |
| General check-up + body foam wash | Starting ₹499 |
| Washing & vacuuming | Starting ₹799 |
| Wheel alignment & balancing (rim wheel) | Starting ₹699 |
| EV battery health check & EV work | Inspection ke baad quote |
Note that the package prices above are the petrol-car catalog prices — an EV has no engine oil, clutch or exhaust, so EV work is always quoted after inspection rather than taken from the package list. Bikes are serviced too — a two-wheeler can be booked the same way, and bike work is quoted after inspection. See our EV service guide for what a full EV service covers, and our EV vs petrol comparison for how the two differ.
Route to Autoport and how to book a battery check
Autoport is at Desai Naka, opposite Croma (SK Plaza) on Kalyan-Shilphata Road, Sagarli Gaon, Dombivli East — on the main road between Dombivli and Kalyan. From Kalyan, drive towards Shil Phata on Kalyan-Shilphata Road, past Manpada junction and Katai Naka, to Desai Naka. From Dombivli East station side, head towards Shil Phata on the same road. The workshop is open 24x7, so a late-evening drop after office works too.
- Call or WhatsApp +91 72080 15250, or book online at book.autoport.co.in. Online, you choose the car, the service, the date and a slot. Nothing is paid online.
- Tell us the car and the symptom in your own words — Hindi, Marathi or English, sab chalega. Mention that it is an EV, when the symptom started, and whether it is getting worse.
- Drive in or arrange pick-up & drop — Desai Naka, opposite Croma (SK Plaza) on Kalyan-Shilphata Road. If a battery warning light is on, or the car will not start or take a charge, ring first rather than pressing the start button over and over.
- Inspection and estimate. We inspect first, then tell you what is wrong, what is urgent and what can wait, with the estimate. Extra work is done only after your approval.
- Collect and pay at the workshop after the job. Old parts can be shown to you on request.
Autoport India Pvt Ltd: address, phone and hours
Autoport India Pvt Ltd, Plot 140/1, Desai Naka, Opp. Croma (SK Plaza), Kalyan-Shilphata Road, Sagarli Gaon, Dombivli East, Thane, Maharashtra 421204. This is the Croma at Desai Naka on Kalyan-Shilphata Road — not the Croma on Manpada Road.
- Phone / WhatsApp: +91 72080 15250
- Hours: open 24x7, Monday to Sunday
- Book online: book.autoport.co.in
Get directions to Autoport on Google Maps
More EV guides
- EV car service in Dombivli and Palava: what it covers
- EV vs petrol car service: the differences
- Car battery replacement in Thane
- EV tyre, brake and AC care in Dombivli
FAQs
My EV has a big battery — why does it also have a small 12V battery?
The little one runs the lights, locks, computers and the systems that wake the car up. The big one drives the wheels. When the small battery goes flat, the car cannot even wake up to use the big one — doors stay locked, screens stay dark — even though the traction battery still holds charge.
How do I tell whether my problem is the 12V battery or the traction battery?
Look at the symptoms. A car that is slow to wake, with dim lights, slow locks or a flickering display, is usually a 12V problem. A sudden fall in range, charging that stops halfway, a battery warning light or a reduced-power mode points at the traction battery. Either way the check starts with a scan, because a light on its own does not identify the failed part.
My EV stood for three weeks and now it will not wake up — what should I do?
Ring us before trying again and again, because each attempt drains the small battery further. First see whether it wakes up normally — lights bright, locks responding, displays alive, no warning light. If it is slow or unresponsive, call +91 72080 15250 first; the workshop is open 24x7.
What does an EV battery health check include at Autoport?
The small battery is measured for voltage and its ability to hold a charge, its terminals are looked at for corrosion and tightness, the charging port is inspected visually — pins, cover, any sign of damage or water entry — and the car is scanned for warning lights and stored fault codes. The high-voltage pack is never opened.
What will an EV battery health check cost me?
EV work is always priced after the car has been seen, because the booking catalog holds no fixed price for EV battery work. We inspect first and explain the estimate before any work starts, and spare parts are billed at actuals. The 12V test itself takes a few minutes.
My EV's range dropped suddenly — is that normal ageing?
A range that drifts down slowly over years is the battery ageing normally. A range that falls suddenly, charging that slows sharply or stops partway, or a battery warning light is not ageing — it needs a diagnosis, and that diagnosis belongs to the brand authorised network, which can read the battery's state of health cell by cell.
How do I keep my EV battery healthy between services?
Do not leave the car sitting at a very low charge for a long time, and do not leave it unused for weeks without checking the small battery. For the exact guidance for your car, follow the owner's manual, because the advice differs for every maker and every battery.
Written by Shivam Kumar (@visionquantech) for Autoport India Pvt Ltd. Published 10 Nov 2026. General guidance only — your car's owner's manual and an in-person inspection come first.