Why This Bundle
The LG M50LT is a long-life variant of the M50 family, carrying the same 5000mAh-class capacity while offering roughly double the rated cycle life (approximately 1000 cycles) compared to the standard M50T — making it a strong pick for e-bikes, ESS packs, and other applications where you'll be cycling the battery repeatedly over years of use. This bundle pairs 2 genuine LG INR21700-M50LT batteries with the XTAR MC2 — a compact, USB-C powered dual-slot charger that intelligently adjusts charging current and includes 0V activation for over-discharged cells. Everything you need to charge and maintain your cells, ready out of the box.
LG INR21700-M50LT Specifications
| Item |
Spec |
| Model |
LG INR21700-M50LT (Flat Top) |
| Nominal Capacity |
5000mAh (approx. 4800mAh typical) |
| Nominal Voltage |
~3.6–3.63V |
| Max Charge Voltage |
4.20V |
| Standard Charge Current |
~1.44A |
| Max Charge Current |
~3.36–3.4A |
| Max Continuous Discharge |
~7.275A (60°C thermal cutoff) |
| Discharge Cutoff Voltage |
2.5V |
| Cycle Life |
~1000 cycles (approx. 2× the standard M50T) |
| Chemistry |
Li-ion, energy-focused, long-cycle-life formulation |
| Cell Size |
21700 (approx. Φ21.15–21.44mm × 70.3–70.4mm, approx. weight 67.7–69.25g) |
| Terminal Type |
Flat Top only |
| Protection Circuit |
None (unprotected cell) |
| Typical Use |
E-bikes, ESS modules, industrial devices, long-runtime and long-cycle-life battery pack builds |
Note: This is an energy/runtime-focused cell, not a high-drain one — it's built for applications that need maximum capacity and long-term cycle durability rather than extreme continuous current.
This is an unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.
The Charger: XTAR MC2
-
USB-C input: DC 5V/1A, works with USB wall adapters, power banks, laptops, and car chargers
-
Dual independent charging slots: charge two batteries simultaneously with individual monitoring
-
Intelligent current adjustment: automatically sets charging current to 0.5A×2 (with a 5V/1A source) or 0.25A×2 (with a lower-power source)
-
0V Activation: helps recover batteries that have over-discharged
-
Multiple safety protections: reverse-polarity protection, short-circuit protection, temperature monitoring
-
Compatible with protected 20700/21700 cells (current USB-C generation)
-
Ultra-compact & lightweight: just 24g, 92mm × 40mm × 32mm
XTAR MC2 – Supported Battery Types & Voltage
Compatible with 3.6V/3.7V Li-ion batteries, including the LG M50LT (21700) in this bundle, across a length range of approximately 31mm to 71.4mm — covering everything from 10440 up through 21700 and 26650 cells.
End-of-charge voltage: 4.20±0.05V · End-of-charge current: ≤120mA
Compatibility Notes
The MC2's charging slots accommodate battery lengths up to roughly 71.4mm, which comfortably fits the M50LT's ~70.3–70.4mm length, including its Flat Top terminal.
Important: This is a large 5000mAh cell, and the MC2 charges at a maximum of 0.5A per slot. A full charge at that rate will take considerably longer than it would on a high-current charger — expect several hours per full charge. The MC2 is best suited here as a portable, gentle-charging backup rather than your primary fast charger for these cells.
What's Included
- LG INR21700-M50LT Battery × 2
- XTAR MC2 Charger × 1
- USB Cable × 1
- User Manual × 1
Safety Tips
- Store batteries in a proper case, keeping them away from loose metal objects to prevent short circuits
- Never disassemble, puncture, burn, or submerge the batteries
- Charge only with a genuine, compatible charger such as the XTAR MC2
- The M50LT is an unprotected cell intended for compatible, purpose-built devices such as e-bikes, ESS modules, and engineered battery packs
- Never discharge below 2.5V or charge above 4.2V
FAQ
Q: Can the XTAR MC2 charge LG M50LT batteries safely? A: Yes, the MC2 correctly detects and charges 3.6V/3.7V Li-ion cells including 21700s like the M50LT, with proper 4.2V cutoff voltage. Just be aware the charging current is much lower than what this cell can typically accept, so a full charge will take longer than it would on a high-current charger.
Q: What makes the M50LT different from other M50-family cells? A: The M50LT is specifically built for longer cycle life — roughly 1000 cycles, about double the rated cycle life of the standard M50T — while keeping the same general 5000mAh-class capacity and moderate discharge profile.
Q: Is the M50LT a high-drain cell? A: No. It's built primarily for energy density, runtime, and long-term cycle durability, with a moderate continuous discharge rating around 7.275A (60°C cutoff). It's better suited to e-bikes, ESS, and long-runtime packs than to devices demanding extreme continuous current.
Q: Will a 21700 battery actually fit in the MC2? A: Yes. The MC2's slots accommodate batteries up to roughly 71.4mm in length, which covers the M50LT's length comfortably.
Q: How long will it take to fully charge an M50LT on the MC2? A: Since the MC2 charges at up to 0.5A per slot and the M50LT has a 5000mAh-class capacity, expect a full charge to take several hours. This charger is better suited as a portable or backup option for these cells rather than a primary fast charger.
Q: Can I charge both batteries at the same time? A: Yes. The MC2 has 2 independent slots and can charge both simultaneously, automatically adjusting current based on your power source.
Q: What's in the box? A: 2 LG INR21700-M50LT batteries, 1 XTAR MC2 charger, a USB cable, and a user manual.
