Answered 14 July 2026
When evaluating the electric car with the **biggest battery in India**, the answer depends heavily on your budget segment—whether you are looking at mainstream, mass-market cars or absolute luxury flagships.
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## 1. The Ultimate Luxury Champion (Biggest Overall Battery)
If price is no bar, the absolute crown for the largest battery pack in India goes to Mercedes-Benz.
* **Vehicle:** **Mercedes-Benz EQS Sedan**
* **Battery Capacity:** **$107.8\text{ kWh}$**
* **Claimed Range:** Up to $857\text{ km}$ (ARAI certified)
* **Runner-Up (Luxury):** The **MG M9** MPV (featuring a **$90\text{ kWh}$** battery pack) and the updated **Hyundai Ioniq 5** / **Kia EV6** (featuring **$84\text{ kWh}$** packs).
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## 2. The Mass-Market/Affordable Champions
For mainstream car buyers looking at the sub-₹25 lakh space, battery capacities have significantly evolved. Mahindra and Tata hold the top spots with purpose-built EV architectures:
### Mahindra BE 6 & XEV 9e / 9S
* **Battery Capacity:** **$79\text{ kWh}$**
* **Claimed Range:** $656\text{ km}$ to $683\text{ km}$
* **Why it matters:** Built on Mahindra’s INGLO platform, these vehicles offer the largest battery capacities available outside the premium luxury price bracket.
### Tata Sierra EV & Harrier EV
* **Battery Capacity:** **$75\text{ kWh}$**
* **Claimed Range:** $627\text{ km}$ to $665\text{ km}$
* **Why it matters:** Built on Tata’s acti.ev+ platform, these SUVs offer heavy-duty battery packs optimized for long highway hauls and All-Wheel Drive (AWD) capabilities.
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## Summary of India's Top EV Battery Sizes
| Car Model | Segment | Battery Size | Claimed Range |
|:--- |:--- |:--- |:--- |
| **Mercedes-Benz EQS** | Ultra-Luxury | **107.8 kWh** | ~857 km |
| **MG M9** | Premium MPV | **90.0 kWh** | ~548 km |
| **Hyundai Ioniq 5 / Kia EV6** | Premium crossover | **84.0 kWh** | ~631-663 km |
| **BYD Seal** | Premium Sedan | **82.56 kWh** | ~650 km |
| **Mahindra BE 6 / XEV 9e** | Mainstream SUV | **79.0 kWh** | Up to 683 km |
| **Tata Sierra EV / Harrier EV** | Mainstream SUV | **75.0 kWh** | Up to 665 km |
Are you looking for a vehicle within a specific price budget, or are you prioritizing the absolute longest real-world driving range?