LG INR21700 M50L 5000mAh 7.2A – 21700 Li-Ion OEM cell

The LG INR21700-M50L is a high-capacity 21700 cell from LG — 5000mAh capacity, continuous discharge current of 7.2A, and exceptionally low internal resistance of ~14mΩ. Factory new cell in OEM version (without original shrink wrap) — fully functional, with factory specifications maintained.

The OEM version means no factory heat-shrink wrap. We include free wraps and insulators with the set — they must be applied manually before installation in a pack.

Technical Data

Why LG M50L?

• 5000mAh in 21700 format — one of the highest capacity results among cylindrical cells. The 21700 format offers more energy than 18650 with a similar pack size.
• Low resistance ~14mΩ — better than the datasheet (15±6mΩ). Good repeatability across the entire batch — crucial for building large packs.
• Better than the cheaper BAK CG50 alternative — significantly higher parameter repeatability. Smaller resistance differences between cells = uniform section temperatures within the pack and longer lifespan.
• Factory new, properly stored — manufacturing year 2022, stored in a heated warehouse at ~25°C, voltages and capacity consistent with the datasheet.

Applications

• Energy storage — high-capacity packs, off-grid systems, emergency power supplies
• Electric bicycles (e-bike) — 36V, 48V, 52V packs with long range
• UPS systems — stable operation, high energy, predictable parameters
• DIY packs — custom builds requiring high capacity with factory new cells
• OEM pack production — industrial and project applications

⚠️ Note: The LG M50L is a high-capacity cell, not a high-current cell. Continuous current is 7.2A — unsuitable for power tools and e-cigarettes. If you need high current, consider Samsung 25R or 30Q series cells (18650 format) or Samsung 40T (21700 format).

Cell without built-in PCM/PCB. Use only in systems with an external BMS. Before assembly, always apply heat-shrink tubing — the negative pole is the entire metal casing of the cell.

Frequently Asked Questions

What is the OEM version?

The OEM version is a cell without factory heat-shrink wrap — identical parameters to the standard version (M50LT), just without the outer packaging. We include free wraps and insulators with every order. The wrap must be applied before installing the cell in the pack.

Where does this batch of cells come from?

The cells come from a canceled OEM project — the end customer withdrew the project due to bankruptcy, which is why the cells became available below the standard LG distribution price, while maintaining full factory quality.

What is the actual capacity of the LG M50L?

The nominal capacity resulting from the energy (18.2Wh) is ~4930mAh. In practice, 5000mAh is assumed as the catalog capacity — measurements of the offered batch confirm parameters consistent with the datasheet.

Is the LG M50L suitable for an electric bicycle?

Yes — it is an excellent choice for e-bikes where range is a priority, not peak power. The 7.2A continuous and 14.4A pulse current will work well in bicycles with moderate power consumption.

How to charge the LG M50L?

CC/CV charging: final voltage 4.2V, standard charging current 1440mA (0.3C). At a temperature of 25–45°C, an allowable current of up to 3360mA (0.7C).