The LG INR21700-M50L is a high-capacity 21700 cell from LG — 5000mAh capacity, 7.2A continuous discharge, and exceptionally low internal resistance of ~14mΩ. Brand new OEM cell (without factory shrink wrap) — full factory quality with parameters matching the datasheet.
The OEM version means no factory shrink wrap. Shrink wrap sleeves and insulators are included free of charge — they must be applied before installing the cells in a pack.
Specifications
| Brand | LG |
|---|---|
| Model | INR21700-M50L |
| Type / Size | 21700 |
| Chemistry | Li-Ion |
| EAN / GTIN | [TO BE FILLED] |
| Maximum voltage | 4.2 V |
| Nominal voltage | 3.69 V |
| Internal resistance | ~14 mΩ |
| Weight | 67.5 g |
| Continuous discharge current | 7.2 A |
Why LG M50L?
- 5000mAh in 21700 format — among the highest capacity cylindrical cells available. The 21700 format delivers more energy than 18650 with a similar pack footprint.
- Low internal resistance ~14mΩ — better than the datasheet spec (15±6mΩ). Excellent batch consistency — critical when building large multi-cell packs.
- Better than the cheaper BAK CG50 — significantly higher parameter consistency. Less resistance variation between cells means even section temperatures and longer pack life.
- Brand new, properly stored — production year 2022, stored in a heated warehouse at ~25°C, with voltages and capacity confirmed to match the datasheet.
Applications
- Energy storage systems — high-capacity packs, off-grid systems, backup power
- Electric bikes (e-bike) — 36V, 48V, 52V long-range packs
- UPS systems — stable operation, high energy density, predictable performance
- DIY battery packs — custom high-capacity builds using brand-new cells
- OEM pack production — industrial and project-based applications
⚠️ Note: The LG M50L is a high-capacity cell, not a high-drain cell. Continuous current is 7.2A — not suitable for power tools or vaping devices. For high-drain applications, consider Samsung 25R or 30Q (18650) or Samsung 40T (21700).
No built-in PCM/PCB protection circuit. Use only in systems with an external BMS. Always apply the shrink wrap sleeve before installation — the entire metal casing is the negative terminal.
Frequently Asked Questions
What does OEM version mean?
OEM means the cell ships without a factory shrink wrap sleeve — identical specifications to the standard M50LT version, just without the outer wrap. Shrink wrap sleeves and insulators are included free with every order. The sleeve must be applied before installing the cell in a pack.
Where does this batch come from?
These cells come from a cancelled OEM production project — the end customer withdrew due to bankruptcy, making the cells available below standard LG distribution prices while retaining full factory quality.
What is the actual capacity of the LG M50L?
The nominal capacity derived from the energy rating (18.2Wh) is ~4930mAh. The 5000mAh figure is the standard marketed capacity — measurements of this batch confirm parameters in line with the datasheet.
Is the LG M50L suitable for an e-bike?
Yes — it’s an excellent choice for e-bikes where range is the priority over peak power. With 7.2A continuous and 14.4A pulse discharge it handles moderate-load motors well.
How do I charge the LG M50L?
CC/CV charging: cutoff voltage 4.2V, standard charge current 1440mA (0.3C). At 25–45°C, up to 3360mA (0.7C) is permitted.
Frequently asked questions
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