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OEM Lithium Battery Manufacturer India — Custom Packs, Factory-Direct

Your Battery. Your Specs. Built in India.

Leolus Energy supplies custom lithium battery packs to OEM manufacturers, system integrators, and product companies across India. Whether you are building drone frames, solar lighting systems, energy storage units, or industrial electronics — we manufacture the battery to your exact specification, from our facility in Bangalore.

Who We Supply — A Battery Pack Manufacturer for OEMs

As a battery pack manufacturer for OEMs, Leolus Energy builds to your specification rather than selling from a catalogue. The six categories below cover most of what leaves our Bangalore line, but the constant is the same: you own the product, we own the pack that has to make it work.

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Drone OEM Manufacturers

Agriculture sprayers, surveillance UAVs, delivery platforms, mapping drones. We build battery packs matched to your drone's weight budget, flight time target, and voltage architecture.

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Solar EPC & Lighting Companies

Solar street lighting, off-grid solar systems, and rooftop storage. We manufacture LiFePO4 packs for outdoor lighting and energy storage applications with integrated BMS and long cycle life.

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Industrial & ESS Integrators

Energy storage systems, commercial backup power, and industrial portable power. We supply scalable battery packs for BESS projects and industrial applications across India.

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Electronics OEMs

Handheld devices, smart instruments, IoT hardware, precision equipment. We design compact lithium battery packs for electronics products requiring long cycle life and integrated protection.

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Weighing & Instruments

Electronic weighing machines, precision laboratory instruments, and field measurement equipment requiring reliable, consistent lithium battery power.

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Lighting & Safety Equipment

Industrial headlamps, emergency lighting, safety equipment, and portable work lights requiring durable lithium battery packs with deep discharge tolerance.

What an OEM Partnership with Leolus Energy Includes

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Custom Battery Design

We work from your voltage, capacity, weight, and form factor requirements. If you have an existing battery you want replaced or improved, share the spec sheet and we'll match or better it.

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Cell Chemistry Selection

Semi-solid state for high energy density drone applications. LiFePO4 for long cycle life solar and storage applications. We advise on the right chemistry for your operational profile.

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Integrated BMS

Every pack includes a Battery Management System configured to your discharge profile. Protection thresholds, cell balancing, temperature limits, and communication interfaces specified to your requirements.

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Connector & Housing Options

We accommodate your connector standard (XT60, XT90, AS150, custom), housing material, mounting points, and label requirements. The battery integrates cleanly into your product.

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Sample & Qualification Support

We supply pre-production samples for your qualification testing before committing to volume. Our team provides technical data sheets and is available for evaluation calls with your engineering team.

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Consistent Supply & Pan-India Delivery

Reliable lead times and consistent quality across production runs. We supply OEM partners across India — Bangalore, Hyderabad, Pune, Delhi, Chennai, and other locations. Dedicated supply arrangements available for volume orders.

Why a Domestic OEM Battery Supplier Matters

A significant share of lithium battery packs currently used in Indian drones and electronics are sourced from outside India. This creates supply chain risk, long lead times, import costs, and — for government or PLI-scheme related procurement — potential compliance issues. A domestically manufactured battery from an MSME-registered Indian supplier resolves all of these:

  • Shorter lead times: Stock and custom production managed in India, without the 6–10 week import windows common with international suppliers
  • Responsive design changes: When your product evolves, we can adjust the battery specification without a 3-month international design cycle
  • PLI and government procurement compliance: Drone OEMs and solar companies supplying government projects increasingly need to demonstrate a domestic battery supply chain
  • After-sales support: If a pack fails in the field, you can reach our team directly — not a foreign manufacturer's support ticket queue
  • No import duty on the battery: Factory-direct supply removes the import cost layer that adds 15–30% to imported battery pack pricing

LFP Battery Manufacturing — LiFePO4 Packs Built in India

When buyers look for LFP battery manufacturers in India, they are usually looking for one of two very different things: cell manufacturing, or pack manufacturing. It is worth being precise about which one you need, because almost nobody in the market makes that distinction clear.

LFP cell manufacturing — producing the raw LiFePO4 cells themselves — is a gigafactory-scale business, and India's domestic cell capacity is still being built out. LFP pack manufacturing is where the engineering that determines your product's actual performance happens: cell grading and matching, series–parallel architecture, BMS design and configuration, thermal layout, enclosure, and validation testing. Leolus Energy is an LFP pack manufacturer, and for the overwhelming majority of OEM requirements that is the partner you actually need.

LFP configurationTypical applicationWhy LFP is the right chemistry here
12.8V (4S)Solar street lighting, off-grid lighting, portable instrumentsNightly deep discharge for years; drop-in voltage match for 12V lead-acid replacement
25.6V (8S)Off-grid solar home systems, telecom & surveillance sitesHigher efficiency at longer cable runs; unattended cycling
51.2V (16S)C&I energy storage, solar hybrid, inverter backupStandard inverter architecture; thousands of cycles over a ten-year asset life
Custom series–parallelESS racks, industrial standby, specialist equipmentBuilt to the enclosure and inverter you already have, rather than the reverse

Where LFP is the right call: anything that cycles daily for years and does not have to be light — solar, ESS, street lighting, industrial standby, weighing and instrumentation. Where it is not: drones and UAVs, where energy per kilogram decides flight time and semi-solid state or Li-ion wins outright. We build both, and we will tell you which one your application actually needs rather than steering you to the higher-margin option.

Cell Sourcing, Imports & Why It Matters to Your Product

India's lithium cell supply is still substantially import-dependent, and any honest Indian battery manufacturer will tell you the same. What separates suppliers is not whether cells are imported — it is what happens to those cells after they land.

We import cells directly from established international manufacturers and then do the work that actually determines pack quality in India: incoming inspection, capacity and internal-resistance grading, cell matching within each pack, assembly, BMS programming and pack-level operational testing. A pack built from graded, matched cells behaves predictably for its whole life. A pack built from ungraded cells fails early at whichever cell was weakest, and no BMS can fully compensate for that.

  • Direct sourcing, not a trading layer: buying cells ourselves keeps the cost structure and the traceability under our control rather than a middleman's
  • Graded and matched in-house: every cell is measured before it goes into a pack, and matched sets stay together
  • Chemistry chosen per application: semi-solid state, Li-ion, Li-polymer or LFP — selected against your duty cycle, not our inventory
  • Documented and invoiced in India: GST invoice, test documentation, local warranty and a support line you can reach in your own time zone
  • Responsible end-of-life: see our battery recycling and disposal process for what happens after the pack's working life

If you are sourcing cells or packs at volume and want to understand exactly where each part of the chain sits, ask us on a call. We would rather explain the supply chain honestly than have you discover the gaps after an order.

Explore Our Product Range

Start Your OEM Battery Enquiry

Tell us your application, voltage and capacity requirements, approximate volumes, and any existing battery specification you want to match or improve. Our team will respond with a technical proposal and timeline within 48 hours.

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OEM Supply — Questions Buyers Actually Ask

Packs — and it is worth putting that question to every supplier on your shortlist. Cell production and pack production are different industries with different capital behind them, and a company doing one seriously is rarely doing the other. What we take responsibility for is everything between the bare cell and your finished product, which is also where most field failures are actually created. If a supplier answers this question vaguely, the vagueness tends to resolve itself badly around month eighteen.

We import them directly from established international cell manufacturers, and we would rather say so plainly. India’s cell supply is still substantially import-dependent, and a pack manufacturer who implies otherwise is worth a second question. What happens in India is the part that decides how long a pack lasts: incoming inspection, capacity and internal-resistance grading, matching cells within each pack, assembly, BMS programming and pack-level testing. Buying cells ourselves rather than through a trading layer keeps traceability and the cost structure under our control instead of a middleman’s.

Start with whether grams matter. If the product sits on a pole, in a rack or on a workbench, weight is close to free and what you are really buying is cycle life — that is LFP’s argument. If it leaves the ground, every gram comes straight out of payload or endurance, and the higher energy density of semi-solid state or Li-ion decides it. We manufacture both, so there is no version of this conversation in which we benefit from pointing you at the wrong one. Where an application sits genuinely between the two, we would rather say so than guess on your behalf.

12.8V (4S) for solar street lighting, off-grid lighting and portable instruments, where it also drops straight into a 12V lead-acid footprint. 25.6V (8S) for off-grid solar home systems and for telecom or surveillance sites that cycle unattended. 51.2V (16S) for C&I storage, solar hybrid and inverter backup, matching standard inverter architecture. Past those three, we build custom series–parallel packs around the enclosure and inverter you already have, rather than asking you to rebuild the system around the battery.

Yes. We supply pre-production samples for your own qualification testing, with technical data sheets, and our engineers will take an evaluation call with your team while the packs are on your bench. A problem found during your qualification is a cheap problem; the same problem found in a first production run is not.

That depends on the tender, and we are not going to tell you otherwise to win an order. What we can state plainly is what we do and where: the pack is manufactured at our Bangalore facility, the cells are imported and then graded, matched and assembled here, and you receive a GST invoice, test documentation and a local warranty. Local-content wording differs from one scheme and one tender to the next, so send us the clause you have to satisfy and we will tell you honestly whether we can support it.