Wholesale BMW i3 Battery Cell NMC 120Ah – The Next-Gen Upgrade Path for High-Performance i3 Rebuilders (Now Available in Bulk with Factory Certification)
“An EV conversion shop in Texas wanted to push their BMW i3 builds beyond stock range—but the standard 117Ah cells capped them at ~300km.
They tried third-party ‘120Ah’ cells from online marketplaces, only to face thermal instability, inconsistent discharge curves, and BMS communication errors.
Then they partnered with CNS BATTERY for Wholesale BMW i3 Battery Cell NMC 120Ah—sourcing certified, high-density NMC 120Ah prismatic cells engineered specifically for drop-in i3 compatibility.
Result? A rebuilt 64kWh pack delivering 340km real-world range, stable regen under load, and zero error codes—all while using the original i3 battery management system.”
If you’re rebuilding, upgrading, or customizing BMW i3 battery packs in 2026, you’ve likely hit the ceiling of what 117Ah cells can deliver.
But not all “120Ah” cells are created equal:
- Many are overrated B-grade units with inflated specs
- Others use different chemistries (LFP, NCA) that confuse the i3’s BMS
- Most lack thermal stability data or cycle life validation
What if you could access true NMC 120Ah cells—designed from the ground up for BMW i3 voltage architecture, cooling layout, and CAN bus behavior?
CNS BATTERY now offers bulk wholesale access to genuine NMC 120Ah prismatic cells, developed in collaboration with tier-1 cell engineers and validated through 500+ real-world i3 installations. These aren’t generic upgrades—they’re precision-engineered replacements that unlock higher capacity without compromising safety or compatibility.
Our Wholesale BMW i3 Battery Cell NMC 120Ah features:
- 🔋 True 120Ah nominal capacity (±1%) at 3.65V—~2.5% more energy per cell than 117Ah
- 🧪 Advanced NMC 811 chemistry: Higher nickel content for greater energy density, optimized for i3 thermal envelope
- ⚖️ Tight tolerance sorting: Internal resistance matched within <0.8mΩ across batches
- 🔌 Identical form factor & terminal layout: Direct replacement for OEM 117Ah cells—no module redesign needed
- 📜 Full compliance package: Includes UN38.3, IEC 62133, CE, and MSDS for global shipping
These cells enable 64–66kWh total pack builds in the original i3 housing—ideal for performance shops, fleet operators, and advanced DIYers seeking more range without a full pack swap.
Why 120Ah Is the Smart Evolution (Not Just a Number)
| Metric | NMC 117Ah (OEM) | NMC 120Ah (CNS) |
|---|---|---|
| Usable Capacity per Module | ~11.25kWh | ~11.55kWh |
| Total Pack Potential (4 modules) | 45–50kWh | 64–66kWh |
| Real-World Range Gain | Baseline | +15–18% |
| BMS Compatibility | Native | Fully compatible (no coding) |
| Cycle Life (80% retention) | ~1,800 cycles | ~1,700 cycles (within safe margin) |
“We’ve built 22 i3 packs with these 120Ah cells. Every one passed dealer-level diagnostics. Customers report smoother acceleration and better highway range—especially with AC on.”
— ElectraForge Custom EV, Austin
Designed for Builders Who Demand Precision
Unlike mass-market “high-capacity” cells, our NMC 120Ah units are:
- Thermally modeled to match i3 liquid-cooling plate contact
- Voltage-profile tuned to avoid SOC miscalculation
- Cycle-tested under i3-specific load patterns (regen spikes, highway cruising, city stop-and-go)
This isn’t speculation—it’s engineering backed by real telemetry from fielded vehicles.
Frequently Asked Questions: Wholesale BMW i3 Battery Cell NMC 120Ah
Q: Will these trigger BMS errors or reduced charging speed?
A: No—the voltage curve and impedance profile are calibrated to stay within OEM tolerances. The i3 BMS treats them as “healthy original cells.”
Q: Do I need to modify the cooling system?
A: No. The cell dimensions (exact match to 117Ah) ensure full contact with the factory cooling plate.
Q: What’s the minimum order?
A: 200 cells (enough for ~12–13 modules). Full pallet orders (1,200+ cells) receive priority production slots.
Q: Are these suitable for non-i3 applications?
A: Yes—for ESS, robotics, or custom EVs—but optimal performance is validated for BMW i3 integration.
Q: How do you ensure cell authenticity?
A: Every batch comes with a CATL-aligned QC report, production date stamp, and IR/OCV sorting log. We never source from open markets.
In the World of EV Upgrades, Marginal Gains Create Maximum Impact
And with CNS NMC 120Ah cells, you gain range—without losing reliability.
Stop Compromising Between Capacity and Compatibility—Source Bulk NMC 120Ah Cells Engineered Specifically for the BMW i3 Platform, Backed by Real-World Validation and Global Compliance.
Because your builds deserve cells that perform as brilliantly as your craftsmanship.
Secure Your Bulk Allocation Today—Request a Technical Datasheet, Sample Batch, or Volume Pricing for Your Next i3 Project:
👉 https://cnsbattery.com/ev-battery-home/ev-battery-contact/