I3 Upgrade Battery

Updated October 6, 2026

Overview

Product sourcing insights & recommendations

22 来源

The market for BMW i3 battery upgrades has shifted from rare official retrofits to a robust aftermarket sector, primarily driven by high-density cell technology from CATL. The "i3 upgrade battery" trend focuses on doubling original range while maintaining the vehicle's compact footprint. Insideevs Taycanforum

Market Trends & Product Insights

* The "Range Doubling" Standard: Current high-end upgrades now center on 154Ah (54kWh) packs, providing up to 186 miles (300km) of real-world highway range—a 156% increase over original 60Ah units. Evcube Insideevs

* Shift to Third-Party Solutions: Official BMW factory upgrades are often cost-prohibitive ($15,000+), leading to the dominance of specialist companies like Martigi Manufacturing (MTG) that utilize CATL NCM cells. Insideevs Recurrentauto

* Plug-and-Play Integration: Modern kits include reflashed Battery Management Systems (BMS) and custom hardware to bypass BMW’s software locks, making them attractive for out-of-warranty DIY owners or independent shops. Evcube Reddit

Sourcing & Supplier Landscape

The supply chain is centered in China, with Shenzhen and Hunan-based manufacturers leading the production of both individual cells and complete kits.

* Custom Cell Sourcing: Prismatic NCM (Nickel Cobalt Manganese) cells with capacities ranging from 93Ah to 154Ah are the primary components sourced for these upgrades. Alibaba Alibaba

* Specialist Suppliers: Key manufacturers provide not only the hardware but also on-site technical support and e-commerce design services for regional distributors. Alibaba Alibaba

Specification	Aftermarket Upgrade (CATL-based)	Original BMW 60Ah (Factory)
Capacity	120Ah - 154Ah (Up to 54kWh)	60Ah (22kWh)
Est. Cost	$4,800 - $6,500 Evcube Insideevs	~$15,000+ (Out of Warranty) Recurrentauto
Cell Type	CATL Prismatic NCM Alibaba	Samsung SDI Prismatic Bimmerpost
Real Range	180 - 240 miles Reddit Evcube	60 - 80 miles Reddit

Detailed product listings and verified supplier profiles are provided in the attached files.

Based on the current aftermarket landscape, you can:

Sources & References

22 sources cited · Verified industry data & reports

BMW i3 154Ah/54kWh Battery Upgrade - Anyone done it?

BMW i3 Forum

I've recently found out about BMW i3 154Ah/54kWh Battery Upgrade. The company has few videos regarding the install and highway and city ...

The new MGT 54 KWh hour battery pack for BMW i3

Reddit · r/BMWi3

The quote price is about 6500$ from Factory. Sounds like a cool upgrade for an old 22 KWh i3. It is supposedly plug and play. 400 km range.

New BMW i3 Battery Bulk Options for 2026

cns battery

Why 2026 Is the Perfect Time for BMW i3 Battery Upgrades ; Enhanced range: Up to 625km (CLTC) for eDrive40L variants ; Optimized battery capacity: ...

Electric vehicle batteries – Global EV Outlook 2026

IEA – International Energy Agency

In 2025, EV battery deployment reached 1.2 TWh, an increase of almost 30% compared to 2024, and more than 7 times greater than in 2020. Light‑duty vehicles ...

Upgrade Your BMW i3 Battery for Double the Range!

EVCUBE

This represents a remarkable 156% increase in capacity compared to the original 60 Ah pack and a 28% increase over the largest original pack.

2027 BMW i3: What We Know So Far

Car and Driver

Max charge rate is 400 kW with a DC charger; a NACS port is standard, but a CCS adapter is provided. Battery preconditioning is activated automatically when a ...

I3 Upgrade Battery

Overview

Market Trends & Product Insights

Sourcing & Supplier Landscape

Bmw I3 Battery Cells Catl Ncm Replacement

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Sources & References