DIY500AMP Cell Intelligence
LG M58T
Best when runtime is the priority and each cell stays within the datasheet current rating.
Manufacturer data sheet
Cell at a glance
Datasheet-verified specification
Full technical specification
| Store SKU | LG-M58T-21700-B1 |
|---|---|
| Manufacturer / model | LG INR21700M58T |
| Format / chemistry | 21700 / Li-ion |
| Rated capacity | 5570 mAh |
| Nominal voltage | 3.59V |
| Full-charge voltage | 4.2V |
| Discharge cutoff voltage | 2.5V |
| Standard charge current | 1.12A |
| Maximum charge current | 5A |
| Continuous discharge rating | 12.5A |
| Initial internal resistance | <=15 mOhm |
| Weight | 73.2g |
| Dimensions | Diameter 21.30-21.80 mm; height 70.50-71.00 mm |
| Charge temperature range | 0C to 55C |
| Discharge temperature range | -20C to 70C |
| Cycle-life reference | 500 cycles >=80% recovered energy at 2.7A charge / 7.5A discharge. |
| Protection | Unprotected industrial cell. The finished device or battery pack must provide appropriate protection. |
Simple selection guide
Is this the right cell for your build?
Match the cell to the job, then confirm the manufacturer limits for the finished pack.Best match
Long-runtime packs, backup power, portable energy, and multi-parallel systems with carefully controlled current per cell.
A better alternative when
Choose a power or hybrid cell when the load needs stronger current delivery or lower voltage sag than this cell is designed to provide.
Application guide
Where this cell fits
Runtime-focused packs, energy storage, backup systems
E-bike / mobility only after current and thermal validation
High-current tools, RC / UAV, vape and e-cigarette devices
Keep the finished pack within every manufacturer voltage, current, and temperature limit.
Engineering limits
Current limits
Manufacturer continuous-discharge ratings only. Pulse and over-current laboratory values stay on BatteryRealData.The displayed continuous limit comes from the matched manufacturer data sheet. Use design headroom and validate heat in the finished pack.
Show current and runtime examples Optional 1C references and idealized runtime estimates
Current envelope
Relative current values from the matched manufacturer data sheet. Bar length is comparative, not a recommendation.
Current and runtime translation
Idealized constant-current runtime based on nominal capacity. Real packs deliver less because voltage sag, heat, cutoff voltage, and losses matter.
Real discharge testing
Tested by BatteryRealData
A datasheet-range public test summary is not available for this exact cell yet. Use the verified manufacturer specification above and open BatteryRealData for separate laboratory context.
Only tests inside the matched data sheet continuous-current range are summarized here. BatteryRealData may separately include controlled pulse or over-current research; those laboratory stress tests are not product ratings or operating instructions.
View datasheet-range graphs and test resultsPack planning aid
Current per cell calculator
Enter the total pack current and the number of parallel cells. This checks current sharing against the unconditional continuous value listed above.Planning aid only. It assumes equal current sharing between matched cells. It does not account for heat, aging, imbalance, conductor resistance, duty cycle, enclosure airflow, or BMS limits.
Read before purchase and use
Safety warning for lithium-ion battery usage
Customers should understand lithium-ion battery handling and safety before purchase. Lithium-ion cells can cause fire, burns, venting, or explosion if misused, overcharged, shorted, crushed, punctured, overheated, or physically damaged.
Use only with a compatible lithium-ion charger, BMS, or protection circuit designed for the cell voltage, current, and temperature limits. Never leave batteries charging unattended. Charge and store on a fire-resistant surface away from combustible materials.
By purchasing and using lithium-ion cells, the user assumes responsibility for correct handling, storage, charging, pack design, and application suitability.
Important usage guidelines
- Not for use in e-cigarettes, vape devices, or similar devices.
- Always use in a protected battery pack or properly controlled test fixture.
- Do not exceed the data sheet maximum charge voltage.
- Do not discharge below the recommended system cutoff voltage.
- Do not charge or discharge outside the data sheet temperature limits.
- Do not carry loose cells in pockets, bags, or toolboxes where they can contact keys, coins, tools, or other metal objects.
- Store and ship cells in protective cases or insulated packaging.
- Do not use batteries with torn wrappers, missing insulator rings, dents, rust, odor, leakage, deformation, heat damage, or visible damage.
- Do not solder directly onto cell terminals. Use proper spot-welding methods only.
- Do not alter, dismantle, puncture, crush, burn, immerse in liquid, or expose cells to open flame.
- Keep away from children and pets.
Pass all safety information to end users to promote safe handling, correct pack design, and proper use.
Common questions
LG M58T FAQ
Does this cell include built-in protection?
No. It is an unprotected industrial cell. A compatible device or finished pack must provide over-charge, over-discharge, over-current, short-circuit, and thermal protection as required by the application.
Is the maximum current the normal operating target?
No. A manufacturer maximum is a limit under stated conditions, not an automatic long-term design target. Use headroom and validate the finished pack under the actual load, duty cycle, cooling, and temperature limits.
Can I solder directly to the cell?
No. Direct soldering can overheat and damage the cell. Use correctly configured spot welding and suitable interconnect material.
Can I mix this cell with another model or an older batch?
Do not mix different models, ages, capacities, internal-resistance groups, batches, or states of charge in one pack. Build with matched cells and balanced parallel groups.
Can I carry or store the cell loose?
No. Isolate the terminals in a protective case or insulated packaging. Never carry loose cells with keys, coins, tools, or other conductive objects.
