LG M58T INR21700-M58T 5800 mAh 12.5A cell : A breakthrough in lithium-ion battery technology 21700

The LG M58T INR21700-M58T cell is an advanced lithium-ion battery that combines record high capacity with robust current performance. Thanks to its performance, it is used in many demanding applications such as electric bicycles, energy storage systems and other electronic devices.

Technical specifications of the LG M58T cell

• • Dimensions and Weight
    • Diameter: 21.5 mm
    • Height: 70.7 mm
    • Weight: 71.7 g
  • Capacity
    • Nominal: 5800 mAh
    • Minimum: 5570 mAh
  • Voltage
    • Nominal: 3,59 V
    • Maximum charge: 4,20 V
    • Minimum discharge: 2,50 V
  • Charge and discharge current
    • Standard charging current: 1120 mA
    • Maximum charging current: 2.7 A (at 4.20 V), 5 A (at 4.0 V)
    • Maximum continuous discharge current: 12,5 A
    • Pulsed discharge current: 15 A (for 15 seconds)
  • Operating temperature range
    • Charging: 0°C to 50°C
    • Discharge: -20°C to 60°C

Cell structure and chemistry

Internal structure

• Cathode materials: Li(Mn,Ni,Co,Al)O₂.
• Anode materials: Graphite + SiO

Production technology

LG uses advanced manufacturing processes to ensure the high quality and reliability of its cells. Each cell undergoes rigorous quality control tests to ensure long-lasting and safe operation.

Comparison of the LG M58T cell with other 21700 models

Cell	Capacity (mAh)	Maximum current (A)
LG M58T	5800	12,5
Samsung 50S	5000	35
Samsung 50E	4930	10
EVE INR21700-40P	4000	40
BAK 21700CG-50	5000	15

LG M58T vs Samsung 50S

Capacity

• LG M58T: 5800 mAh – one of the highest capacities available in 21700 cells.
• Samsung 50S: 5000 mAh – lower capacity compared to the LG M58T, but still higher than many other 21700 models.

➡ Conclusion: the LG M58T offers higher capacity, which translates into longer device runtime without the need for frequent charging.

Current capacity

• LG M58T: The maximum continuous discharge current is 12.5 A.
• Samsung 50S: Maximum continuous discharge current is 35 A.

➡ Conclusion: the LG M58T offers high stability at higher loads, but the Samsung 50S may be a better choice for applications requiring very high discharge current.

LG M58T vs Samsung 50E

Capacity

• LG M58T: 5800 mAh – one of the highest capacities available in a 21700 cell.
• Samsung 50E: 4930 mAh – lower capacity compared to the LG M58T.

➡ Conclusion: the LG M58T offers a higher capacity, resulting in longer device runtime.

Current capacity

• LG M58T: The maximum continuous discharge current is 12.5 A.
• Samsung 50E: The maximum continuous discharge current is 10 A.

➡ Conclusion: the LG M58T provides higher stability at higher loads.

LG M58T vs EVE INR21700-40P

Capacity

• LG M58T: 5800 mAh – higher capacity.
• EVE INR21700-40P: 4000 mAh – lower capacity.

➡ Conclusion: the LG M58T offers longer device runtime due to its higher capacity.

Current capacity

• LG M58T: The maximum continuous discharge current is 12.5 A.
• EVE INR21700-40P: The maximum continuous discharge current is 40 A.

➡ Conclusion: the EVE INR21700-40P is the better choice for applications requiring high discharge current.

LG M58T vs BAK 21700CG-50

Capacity

• LG M58T: 5800 mAh – higher capacity.
• BAK 21700CG-50: 5000 mAh – slightly lower capacity.

➡ Conclusion: the LG M58T provides a longer operating time for the devices.

Current capacity

• LG M58T: The maximum continuous discharge current is 12.5 A.
• BAK 21700CG-50: The maximum continuous discharge current is 15 A.

➡ Conclusion: the BAK 21700CG-50 can handle slightly higher current loads.

Summary

The LG M58T cell is distinguished by its high capacitance, which is beneficial for devices requiring long operating times. However, in applications requiring higher discharge currents, such as the EVE INR21700-40P or the BAK 21700CG-50, they may be more suitable. Choosing the right cell depends on the specific capacity and current capacity requirements.

Applications, compatibility and charging process of the LG M58T cell

Applications and compatibility

With its high capacity of 5800 mAh and stable current capacity, the LG M58T cell is widely used in a variety of sectors – from e-mobility to industry and everyday appliances.

Electric vehicles and e-mobility

The LG M58T is the perfect solution for lightweight electric vehicles that require long operating times and stable power.

• 🚲 Electric bikes (e-bikes) – more capacity means more range per charge.
• 🛴 Electric scooters – provides stable power, which is key for urban users.
• 🛹 Powered skateboards – high energy density allows for a dynamic ride with low cell weight.

➡ Thanks to its stable current capacity, the LG M58T cell is particularly appreciated in e-mobility applications where range and reliability are important.

Industry and professional equipment

The LG M58T is ideal for industrial and professional wireless devices, where performance and durability are key.

• 🔨 Cordless power tools – higher cell capacity extends run time per charge.
• ⚡ Uninterruptible power systems (UPS) – used in energy storage systems to keep equipment running in the event of a power failure.

➡ With its high capacity and long life, the LG M58T cell is perfect for professional applications where stability and durability are key.

Torches and everyday devices

The LG M58T will also perform well in consumer devices that require high power and reliability.

• 🔦 Tactical and outdoor torches – high capacity allows for longer operation in the field.
• 📷 Photographic equipment – used in camera grips and flashes for longer runtime.

➡ This is the ideal cell for users needing long running time for their devices without the need for frequent recharging.

Charging process and maintenance

Proper charging and maintenance of the LG M58T cell significantly affects its life and performance. Following the manufacturer’s recommendations avoids degradation and ensures long-term, safe use.

Recommended chargers and charging currents

• Standard charge: 1120 mA – recommended for maximum cell life.
• Fast charging: 2.7 A (at 4.2 V, 10-50℃) / 5 A (at 4.0 V, 10-40℃) – allows faster charging but may shorten cell life.

🛑 D o not exceed the maximum charging voltage of 4.20 V – this may cause the cell to overheat.

Optimum storage conditions

• Temperature: -20°C to 25°C – best conditions for long-term storage.
• Cell charge: 40-60% – recommended for cells stored for longer than 3 months.
• No contact with metals – avoid short circuits by insulating the poles of the cell.

➡ Using suitable chargers and storing the cell under optimum conditions significantly extends its life.

Tips for use

How to avoid degradation of the cell?

✅ Do not overcharge or discharge to too low a voltage – discharging below 2.50 V can damage the cell.
✅ Avoid overheating – using the cell at temperatures above 60°C will shorten its life.
✅ Do not expose to shocks or punctures – mechanical damage may cause internal short circuits.

Storage and transport

• Store at room temperature, preferably in special cases or protective covers.
• Do not transport the cell loose – contact with metal objects (e.g. keys, coins) may cause a short circuit.
• Transport in accordance with regulations – lithium-ion cells are subject to transport regulations, especially when transported by air.

➡ Taking care of proper storage and use conditions ensures the safety and long life of the LG M58T cell.

Advantages and disadvantages of the LG M58T cell

Advantages

✅ High capacity in a compact size – 5800 mAh is one of the highest among 21700 cells, allowing devices to run longer without frequent charging.
✅ Stable current capacity – the cell provides a continuous 12.5 A, making it suitable for demanding applications.
✅ Long life cycle – thanks to high quality materials and precision manufacturing, the M58T cell offers long life and stable performance even after multiple charge cycles.

Disadvantages

❌ Higher price compared to other cells – due to its advanced technology and high capacity, the M58T cell can be more expensive than standard 21700 models.
❌ Limited availability on the market – due to high demand and limited supply, the cell may be difficult to obtain in some shops.

User reviews and tests

User reviews and experiences

Performance in practical applications

Among users, the LG M58T has received praise for:

✅ Long life – users confirm that the cell retains capacity well even after many cycles.
✅ Excellent current stability – works well in e-bikes, powerbanks and energy storage systems.
✅ Efficiency for long usage sessions – many users praise the higher capacity, which allows devices to run longer compared to competing models.

Laboratory tests

Capacity and endurance test results

In laboratory tests, the LG M58T showed:

📊 A ctual capacity close to the declared capacity (5700-5800 mAh on average at nominal load).
🔥 Excellent heat resistance – the cell remains stable even at long-term discharge of 10-12 A.
🔋 Minimal capacity loss after 300 cycles – tests show that even after intensive use, the cell still offers more than 90% of its original capacity.

➡ Conclusion: tests confirm the high quality and stability of the LG M58T, making it one of the best cells in its class.

Safety and operating instructions for the LG M58T cell

To ensure safe and long-lasting use of the LG M58T cell, the following charging, storage and disposal instructions must be followed.

Charging

• Usesuitable chargers – Use only high quality lithium-ion chargers equipped with voltage and temperature control systems to charge the cell.
• Avoid overcharging – Do not exceed the maximum charging voltage of 4.20 volts. Overcharging can lead to overheating, degradation of the cell or even risk of ignition.
• Temperature monitoring – Charging of the cell should take place between 0°C and 50°C to prevent chemical damage inside the cell.

Storage

• Cool and dry storage – It is recommended to store cells between -20°C and 25°C and in a dry environment to avoid material degradation.
• Avoid contact with metal objects – Store cells in insulated containers or covers to prevent accidental short circuiting.
• Store in a partially charged state – When storing a cell for long periods of time, it is recommended to keep the charge level between 40-60% to minimise chemical degradation.

Disposal

• Recycling in accordance with local regulations – Lithium ion cells must not be disposed of in normal rubbish. They must be handed over to specialist recycling or electro-waste facilities.
• Avoid mechanical damage before disposal – The cell must not be punctured, crushed or subjected to high temperatures before being recycled.

Why choose this cell?

✅ Highest capacity among the 21700 cells – as much as 5800 mAh, which means your devices run longer on a single charge.
✅ Stable current capacity – 12.5 A continuous discharge current, allowing safe use in demanding applications.
✅ Long life cycle – even after 500+ charge cycles, it maintains high efficiency, making it an investment for years to come.
✅ Advanced technology and safety – robust chemical design with thermal protection and minimal risk of overheating.
✅ Versatile application – works well in electric vehicles, energy storage systems and consumer electronics.

➡ LG M58T is one of the best cells on the 21700 market – offers an excellent balance of capacity, performance and safety in use.

Summary

The LG M58T cell is an excellent choice for demanding users looking for high capacity, stable performance and long life. Thanks to LG’s state-of-the-art technology, it is one of the best cells available on the 21700 market. If you are looking for reliability and long service life, the LG M58T will meet your expectations.

Frequently asked questions

Frequently asked questions by users

How long does the LG M58T cell last on a single charge?

The operating time of the cell depends on the load. In typical applications:
🔋 In an electric bike – in a 48V battery (13s) it provides longer range than cells with lower capacity.
🔋 In a powerbank – allows more charge cycles compared to standard 5000 mAh cells.
🔋 In an energy storage system – ensures devices last longer without frequent recharging.

➡ The lower the current load, the longer the cell holds energy.

---

Can I use this cell in any 21700 device?

Not all 21700 devices are compatible with the LG M58T. Please check before use:
✔ Maximum charge and discharge voltages – this should be within the parameters of the cell (4.20 V / 2.50 V).
✔ Current requirements – if your device requires higher currents than 12.5 A, consider other cells e.g. Sony VTC6A.
✔ Cell length – LG M58T is 71mm, some devices require shorter cells.

➡ A lways check the specifications of your device before you buy!

---

What are the most common errors in use?

❌ Using unsuitable chargers – using a charger without voltage and current monitoring can shorten the life of the cell.
❌ S torage in poor conditions – exposure to high temperatures or moisture can cause chemical degradation.
❌ Improper disposal – discarding in regular rubbish is an environmental and safety hazard.
❌ S hort-circuiting of cell poles – accidental contact with metal objects can lead to damage or fire.

➡ By following the manufacturer’s recommendations, problems can be avoided and the life of the cell maximised.

Customer reviews