Short answer: the Jaecoo 5 EV was sold in Thailand with two different battery packs — a 58.9 kWh unit in the early imported cars and a 50.6 kWh unit in the locally assembled Max+. Range is around 405 km and it charges at up to 130 kW.
If you’re searching for the 12V replacement cost instead, that’s ฿2,800 - ฿3,400 in Phuket, fitted.
The Two Packs — Check Which You Have
This trips people up, because both figures are correct depending on when and how your car was built.
| Variant | Assembly | Traction battery | Price at launch |
|---|---|---|---|
| Long Range Dynamic | CBU (imported) | 58.9 kWh | ฿589,000 |
| Long Range Max | CBU (imported) | 58.9 kWh | ฿679,000 |
| Max+ | CKD (Thai-built) | 50.6 kWh | ฿579,000 - ฿599,000 |
Earlier launch pricing ran ฿549,000 - ฿599,000, and the locally assembled Max+ was repriced upward by ฿20,000 in May 2026.
Why it matters: if you’re comparing charging times, range or resale, you need to know which pack is in your car — a 58.9 kWh imported car and a 50.6 kWh Thai-built car are genuinely different vehicles despite wearing the same badge.
Shared Specifications
| Item | Spec |
|---|---|
| Range | around 405 km (50.6 kWh version) |
| Output | 211 PS / 288 Nm |
| 0-100 km/h | 7.7 seconds |
| Top speed | 175 km/h |
| DC fast charging | up to 130 kW |
| Dimensions | 4,380 mm long, 1,860 mm wide, 2,620 mm wheelbase |
| Seats | 5 |
For Phuket use, 405 km is comfortably more than you need — the island is about 50 km end to end. The 130 kW charging is the more relevant number if you drive to Krabi or Phang Nga.
The 12V Battery — What We Can and Can’t Tell You
Jaecoo does not publish the 12V auxiliary battery specification for the 5 EV, and it isn’t in the public spec sheets. Anyone quoting an exact Ah figure online for this model is guessing.
What we can say accurately:
- It is an AGM or EFB lead-acid auxiliary battery, as used across this class of Chinese EV.
- It sits under the front bonnet.
- In Phuket it typically lasts 18-24 months.
- We identify the exact case size and terminal layout on site before fitting, which is why we quote a range.
We’d rather say that than invent a part number. If a shop quotes an exact spec for a Jaecoo 5 without seeing the car, ask where the figure came from.
Why the 12V Is the One That Strands You
The traction pack moves the car. The 12V wakes it: computers, door locks, and the contactors that connect the traction battery to everything else.
When the 12V dies, a Jaecoo 5 showing 300 km of range is completely immobile — and you cannot charge your way out of it, because the car can’t wake up to negotiate with the charger.
Symptoms, and What Each One Means
| What you see | What it means | Urgency |
|---|---|---|
| 12V or auxiliary battery warning on screen | Below threshold, still driveable | Replace within days |
| Screen slow to boot or rebooting while driving | Voltage sagging under load | Replace this week |
| Car won’t go to READY, no error | 12V too weak to close the contactors | Now |
| Key fob won’t unlock the doors | 12V completely flat | Now |
| Charging won’t start when plugged in | Car can’t wake to talk to the charger | Now |
| Dead after 5-7 days parked | Normal drain on a tired 12V | Replace |
Jaecoo 5 12V Replacement Price in Phuket
| Item | Price |
|---|---|
| AGM/EFB 12V (identified on site) | ฿2,800 - ฿3,400 |
| Fitting + reset | Free |
| Call-out anywhere in Phuket | Free |
| Memory keeper during swap | Included |
| Old battery trade-in | Deducted from your bill |
| Warranty | 1 year |
How It Compares in Its Class
| Model | Price | Traction battery | Range | 12V replacement |
|---|---|---|---|---|
| Jaecoo 5 EV | ฿579,000+ | 50.6 / 58.9 kWh | ~405 km | ฿2,800 - ฿3,400 |
| Geely EX2 | ฿429,990+ | 39.4 kWh | 395 km | ฿2,800 - ฿3,200 |
| BYD Atto 1 | ฿459,900 | 38.8 kWh | 380 km | ฿2,800 - ฿3,200 |
| BYD Dolphin | ฿699,900 | 44.9 kWh | 410 km | ฿2,800 - ฿3,200 |
| BYD Atto 2 | ฿659,900 | 51.13 kWh | 410 km | ฿2,900 - ฿3,400 |
The Jaecoo 5’s closest rival on paper is the BYD Atto 2 — similar pack size, similar money, with the Jaecoo charging faster (130 kW against 82 kW) and BYD having the larger service network in Thailand.
Why Phuket Is Hard on the 12V
Heat. Under-bonnet temperatures pass 60°C on an afternoon; battery life roughly halves for every 10°C above 25°C. Hence 18-24 months here rather than 3-4 years.
Always-on electronics. Telematics, alarm and the head unit keep waking the car while parked. Five to seven days unplugged is enough on a battery that’s halfway through its life.
Salt air. Terminal corrosion raises resistance until the car can’t draw enough current to wake.
What to Do If It Won’t Wake Up
1. Use the mechanical key. The fob contains a metal blade for the driver’s door.
2. Don’t jump start it from another car yourself. EV low-voltage systems tolerate spikes far worse than petrol cars, and control modules cost many times the battery.
3. Don’t leave it flat for days. A discharged AGM sulphates permanently.
4. Call for a proper 12V jump or replacement. We carry surge-protected boosters sized for EV systems.
Our jump start service covers cars only — we do not service motorcycles or scooters.
Frequently Asked Questions
What battery does the Jaecoo 5 EV use?
Two packs were sold in Thailand: 58.9 kWh in the imported CBU cars (Long Range Dynamic and Max) and 50.6 kWh in the Thai-assembled Max+. Range is around 405 km with charging up to 130 kW.
How many kWh is the Jaecoo 5 EV battery?
Either 50.6 kWh or 58.9 kWh depending on your variant and whether the car was imported or locally assembled.
How much does a Jaecoo 5 battery replacement cost?
The 12V auxiliary battery is ฿2,800 - ฿3,400 fitted in Phuket. The traction pack is a separate component under manufacturer warranty and is not a routine replacement item.
What size 12V battery does the Jaecoo 5 take?
Jaecoo doesn’t publish the specification. It’s an AGM or EFB lead-acid unit under the front bonnet; the exact case size needs identifying on the car.
My Jaecoo 5 has plenty of range but won’t start. Why?
It’s the 12V, not the traction pack. The 12V closes the contactors that connect the main battery. If it’s flat, the car can’t wake up to use its own energy, and charging won’t start either.
How long does the Jaecoo 5’s 12V last in Phuket?
Typically 18-24 months, versus 3-4 years in cooler climates. Heat is the dominant factor.
Get a Price for Your Jaecoo 5
We identify the correct 12V on site and fit it the same visit, with the reset done properly.
Call 098-168-9907 — 24 hours, anywhere in Phuket, arrival in 20-30 minutes.
Related Reading
- Car Battery Replacement Cost 2026 - full price guide
- BYD Atto 2 Battery Guide - the closest rival
- Geely EX2 Battery Guide - the cheaper alternative
- EV Battery Service - all EV brands