Genuine Samsung, LG and Molicel cells, UN38.3, IEC 62133 and SDS documents, lot traceability, and fast, flexible supply for manufacturers and pack builders.

If you build battery packs, power tools, lighting, robotics, medical carts or any product that runs on lithium cells, your cell supplier is part of your production line. A late shipment stops assembly. A batch that tests differently from the last one can trigger rework. A missing UN38.3 report can hold a whole pallet at the carrier. Here's how 18650 Battery Partners keeps manufacturers supplied with the right cells and the right paperwork, on time.

Shop: Samsung 50S 21700 5000 mAh SDI 25 A Bulk Pack

Genuine cells from the brands engineers specify

We supply genuine Samsung, LG and Molicel lithium-ion cells sourced through established supply channels, along with Panasonic/Sanyo, EVE and Hohm Tech models. Commonly requested production cells include:

• Samsung 40T 21700: 4,000mAh, 35A max continuous
• Samsung 50S 21700: 5,000mAh, 25A max continuous
• Samsung 30Q 18650: 3,000mAh, 15A continuous
• LG MJ1 18650: 3,500mAh high capacity
• Molicel P42A 21700 and Molicel P50B 21700
• Molicel P28A 18650

See everything available for volume orders in our bulk exclusive cells and special order bulk collections.

Shop: LG MJ1 18650 Bulk 18650 Lithium-ion Battery - Wholesale Only

Certifications ready when your shipment is

Dangerous-goods rules don't wait for paperwork. Lithium cells and packs ship under UN3480 or UN3481, and carriers, freight forwarders and customers' compliance teams routinely ask for:

• UN38.3 test reports or test summaries: required for transport of lithium cells and batteries
• IEC 62133 / CB certificates: safety certification for portable rechargeable cells
• Safety Data Sheets (SDS/MSDS): handling, storage and emergency information
• Manufacturer datasheets: the specs your engineers design to

Documentation comes with your order, and much of it is public in our 18650 Data Center. For example:

• Samsung 40T IECEE CB certificate (IEC 62133)
• Samsung 40T Safety Data Sheet (2025)
• Samsung 50S UN38.3 test summary
• Samsung 35E Safety Data Sheet (2025)
• EVE INR18650/35V UN transport test report and MSDS
• LG MJ1 MSDS

Full manufacturer specification sheets and additional reports are available to business customers on request.

Consistency you can build on

• Lot consistency. Matched cells matter in pack building. We ship cells from the same production lot wherever possible and record lot and date codes for your traceability records.
• The same cell, order after order. Changing cell models mid-production can mean new pack testing. We help you stay on the cell you designed and certified around.
• Manufacturer-direct support. Warranty claims, returns and technical questions are escalated to the cell manufacturer for you.

Shop: Molicel P42A 21700 Li-Ion Battery 42A 4200mAh

Fast, flexible supply

• Quick turnaround. In-stock orders ship same day, so a short-notice need doesn't stall your line.
• Scheduled deliveries. Set up recurring shipments on your build calendar so cells arrive before you need them, with no long-term contract required.
• Any quantity. Prototype runs, R&D samples of a new model, odd quantities, mixed models or full production volume. We work with you, not a rigid MOQ table.
• One-off projects welcome. Repair runs, replacement-cell projects and single production batches.
• A real person on your account. Talk directly with our team by phone, email or quote request about pricing, availability and lead times.

Built-in safety, start to finish

Safe manufacturing starts with genuine, documented cells and continues with handling and design. We publish practical guidance for your team: 18650 battery safety guidelines, charger safety, and our Battery Learning Center guides on pack building. We also stock the battery building supplies your line uses, including nickel strip, cell holders and spot welders.

Start a supply relationship

Tell us the cell model, monthly volume and delivery schedule, and we'll come back with pricing, availability and the documentation package.

• Request a bulk quote
• Open a wholesale account
• Learn more about our bulk supply program

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