4-Pack LG INR21700 M58T 5800mAh 12.5A Flat Top Battery – Ultra High Capacity for Solar Storage, Flashlights & E-Bike

LG 4Pcs INR21700 M58T 5800mAh 12.5A – High Capacity Battery for Cordless Tools & Solar Storage

Product Description

Unlock the true potential of your energy-demanding devices with the LG 4Pcs INR21700 M58T 5800mAh 12.5A Battery – a genuine high-capacity lithium-ion cell from LG Energy Solution, one of the world‘s most trusted battery manufacturers.

The LG INR21700-M58T is engineered for applications where runtime matters most. With a typical capacity of 5800mAh (min. 5570mAh), this 21700 cell delivers an industry-leading 20Wh of energy at a nominal voltage of 3.59V, offering an impressive energy density of 273 Wh/kg. Released in 2022 and manufactured in South Korea, the M58T represents LG’s commitment to pushing the boundaries of lithium-ion technology, delivering 12.5% more capacity than its predecessor, the M50LT.

This 4-piece pack gives you four matched cells, ensuring consistent performance in multi-battery setups. With a maximum continuous discharge current of 12.5A (≈3C rate) and a proven cycle life of over 500 cycles with 80% capacity retention under normal usage, the LG M58T is built to deliver long-lasting, reliable power.

The M58T is designed specifically for battery packs used in e-bikes, power tools, LEVs (Light Electric Vehicles), and energy storage systems where high capacity is more important than ultra-high current draw. Independent testing confirms the M58T is a very good performer, equal to the Vapcell F58/F60/F63, and offers longer runtimes than the Lishen LR2170SK at moderate discharge rates.

Important Note: These are unprotected flat-top cells – designed for experienced users who integrate proper battery management systems (BMS) or use devices with built-in protections. If you need ultra-high discharge (45A+), consider the Molicel P45B or P50B. But if you need maximum runtime per charge for your power tools, solar storage, or e-bike, the LG M58T is your perfect match.

Upgrade your power source today and experience the difference that LG‘s world-class battery engineering makes.

Key Features

•  Ultra-High Capacity – 5800mAh (Min. 5570mAh) Per Cell
  Enjoy the longest runtime available in the 21700 format. The 5800mAh typical capacity means you can drill longer, ride farther, and power your solar storage system for extended periods without frequent battery swaps.

•  Reliable Discharge – 12.5A Continuous (≈3C)
  12.5A continuous discharge rating provides ample current for cordless power tools, e-bikes, and solar storage applications. Independent testing confirms stable voltage under moderate loads.

•  Long Cycle Life – 500+ Cycles at 80% Retention
  Retain at least 80% of original capacity even after 500 charge/discharge cycles under normal usage. Minimal self-discharge and no memory effect mean you can recharge at any state of discharge without capacity loss.

•  High Energy Density – 273 Wh/kg
  With a gravimetric energy density of 273 Wh/kg and volumetric energy density approaching 800 Wh/L, the M58T packs more energy per gram than virtually any other 21700 cell on the market.

•  Moderate Fast Charging – 2.7A Max / 5A with Voltage Cut-off
  Standard charge at 1.12A (6 hours full charge) or fast charge at up to 2.7A (4.20V cut-off) / 5A (4.0V cut-off) to get back to work quickly.

•  Wide Operating Temperature Range
  Discharge range: -20°C to +60°C; Charge range: 0°C to 50°C. Reliable performance in diverse environments – from cold workshops to hot summer garages.

•  Low Internal Resistance – ≤15mΩ AC
  Low internal resistance minimizes energy wasted as heat, delivering more usable energy to your device. Independent testing measured DC IR at 18.6–19.1mΩ, showing decent consistency.

•  Standard 21700 Form Factor – Fits Your Devices
  Dimensions: approx. 21.8mm diameter × 71.0mm height, weight approx. 73.2g max. Standard size fits most power tool battery cases, e-bike battery packs, and DIY battery holders.

•  Premium Safety Certifications
  Certified with UL1642, UN38.3, PSE, and IEC/UL62133-2 – ensuring safe shipping, handling, and operation.

•  Advanced NMC Chemistry
  LiNiMnCoO₂ (NMC) chemistry delivers an excellent balance of energy density, cycle life, and safety performance.

•  4-Piece Matched Pack
  Each pack contains four cells with closely matched voltage and internal resistance – ideal for building 4S packs or replenishing tool battery packs.

• Trusted by Industry Leaders
  LG Energy Solution is a global leader in lithium-ion battery technology, trusted by automotive, industrial, and consumer electronics brands worldwide.

 Technical Parameters

Here are the full technical specifications of the LG INR21700-M58T high-capacity cell – everything you need to design your battery pack or ensure compatibility with your device.

Applications

This high-capacity battery is a powerhouse for energy-demanding applications. Here is where the LG M58T 21700 5800mAh 12.5A truly shines:

•  Cordless Power Tools
  Perfect for drills, impact drivers, circular saws, and other power tools where long runtime between charges is critical. Replace worn-out cells in your tool battery packs to restore or even improve original performance. The 12.5A discharge rating provides ample power for most cordless tools.

•  Solar Energy Storage
  Ideal for building DIY solar generators, portable power stations, and home backup systems. The high energy density (273 Wh/kg) means you can store more energy in less space. Over 500 cycles ensure years of reliable service.

•  E-Bikes & Light Electric Vehicles (LEVs)
  Excellent for long-range e-bike battery packs, e-scooters, and other LEVs where range matters most. The 5800mAh capacity means fewer charging stops on long rides. Suitable for 24V, 36V, 48V, and 72V configurations.

•  High-Performance Flashlights
  Great for tactical flashlights, searchlights, and headlamps that demand long runtime at moderate brightness levels. The high capacity keeps your light shining through extended outdoor adventures.

•  DIY Battery Packs
  Build your own portable power stations, camping power supplies, electric skateboards, or custom battery banks. Use with a suitable BMS for safe and reliable operation. The 4-piece pack is the perfect starter kit for your next DIY project.

•  Portable Electronics
  Power portable speakers, wireless headsets, portable scanners, smart video doorbells, fiber optic testers, and other electronic devices where capacity is king.

•  Medical & Emergency Equipment
  Portable medical devices (infusion pumps, patient monitors) and emergency backup systems benefit from the high reliability, long cycle life, and wide operating temperature range of the M58T.

•  Robotics
  Provides stable power for robotics projects and autonomous guided vehicles (AGVs) where moderate current draw and extended runtime are required.

•  Portable Gaming Devices
  Mod your handheld gaming consoles or build custom high-capacity power banks to keep your gaming sessions going for hours.

•  Lab Experiments & Education
  Excellent for university engineering projects, battery testing, battery management system (BMS) prototyping, and renewable energy research.

Important Performance Note: The M58T is a high-capacity, moderate-discharge cell. For optimal performance and maximum capacity delivery, operate at discharge currents below 10A. At higher currents (>12.5A), capacity will decrease and voltage sag will increase.

Safety & Handling Instructions

These are unprotected high-capacity cells. Use only with a proper battery management system (BMS) or in devices with built-in protection circuits.

•  Do not short circuit, over-discharge (below 2.5V), over-charge (above 4.20V), or reverse polarity.

•  Always charge with a compatible lithium battery charger (CC/CV mode) designed for 21700 cells.

•  Do not expose to temperatures above 60°C during discharge or above 50°C during charging.

•  Do not puncture, crush, disassemble, or incinerate.

•  Store in a non-conductive battery case away from metal objects.

•  Always use matched cells (same voltage, same capacity, same brand) when building multi-cell packs.

•  For experienced users only – improper use may cause overheating, fire, or explosion.

•  Inspect cells before use – do not use if wrapper is damaged, insulator is torn, or there is visible deformity.

•  Cells should only be spot welded; do not solder directly onto battery terminals.

Frequently Asked Questions (FAQ)

Q: What is the actual capacity of the LG M58T?
A: The typical capacity is 5800mAh, with a minimum of 5570mAh (5.57Ah). Independent testing by Mooch delivered about 5670mAh average. The cell offers 20Wh of nominal energy at 3.59V.

Q: What is the actual maximum continuous discharge current?
A: The official LG datasheet lists 12.5A as the maximum continuous discharge rating (at 0–35°C). At higher ambient temperatures, the rating decreases: 10A (35–45°C) and 7.5A (45–60°C). This cell is designed for high capacity, not ultra-high current (12.5A ≈ 3C rate).

Q: Can I use this battery for vaping?
A: No. This cell is not recommended for vaping or e-cigarette devices. Ultra-high capacity cells like the M58T are not designed for the high current demands of sub-ohm vaping. If you need a high-drain cell for vaping, consider Molicel P45B (45A) or P50B (50A).

Q: How fast can I charge these batteries?
A: Standard charging at 1.12A takes about 6 hours from empty to full. Fast charging at 2.7A (4.20V cut-off) or 5A (4.0V cut-off) can reduce charge time significantly. For longest cycle life, stay at or below 1.12A.

Q: Are these protected cells?
A: No, these are unprotected flat-top cells. Always use with an external BMS or a device that has built-in overcharge, over-discharge, and short-circuit protection.

Q: Can I use the M58T in my power tool battery pack?
A: Yes, if your tool‘s battery case accepts 21700 cells and you have a BMS rated for at least 12.5A continuous discharge. The 5800mAh capacity will provide significantly longer runtime than standard 5000mAh cells.

Q: What is the cycle life of the M58T?
A: Under normal usage with standard charging (1.12A) and moderate discharge, the M58T retains ≥80% of its original capacity after 500 cycles. At higher discharge currents (7.5A), cycle life may be shorter.

Q: Does the M58T work in cold weather?
A: Yes, the M58T can discharge down to -20°C, though capacity will be reduced. For best performance in cold weather, keep the battery pack above 0°C when possible.

Q: How does the M58T compare to other high-capacity 21700 cells?
A: Independent testing shows the M58T is a very good performer, equal to the Vapcell F58/F60/F63, and offers longer runtimes than the Lishen LR2170SK at moderate discharge rates (5A and 10A). The Samsung 55E performs slightly better (runs longer) than the M58T.

 Add to Cart – Get the LG 4-pack M58T now and power your tools and projects with maximum runtime!