Description
The Samsung 58E (INR21700-58E) is a premium 21700 lithium-ion cell engineered for maximum runtime and reliable performance. Delivering an impressive 5500mAh capacity and a stable 11A continuous discharge, it is one of the highest-capacity 21700 cells available, making it the ideal power source for devices where endurance is critical: high-performance flashlights, high-capacity power banks, e-bikes, and large DIY battery packs. The cell features low internal resistance and excellent cycle life, ensuring consistent, long-lasting power. Available in Button Top, Flat Top, Nickel Tab, Protected Top, and Pre-wired options, with 1, 2, 4, 6, 8, and 10 pack options to suit your project needs.
Key Features
5500mAh Ultra-High Capacity: One of the highest energy densities available in the 21700 form factor. Perfect for applications that require long intervals between charges.
11A Continuous Discharge: Provides stable, reliable power for medium-drain devices, including high-output flashlights, power banks, and e-bikes.
Multiple Terminal Options: Button Top for spring-loaded devices; Flat Top for spot-welding and standard contacts; Nickel Tab and Pre-wired with Leads for custom battery pack assembly; Protected Top for built-in overcharge/over-discharge protection.
Low Internal Resistance: Minimizes heat generation and energy loss, ensuring maximum power delivery to your device.
Excellent Cycle Life: Retains over 80% of initial capacity after 500 charge/discharge cycles under recommended conditions, reducing long-term replacement costs.
Multiple Pack Options: Available in 1, 2, 4, 6, 8, and 10 packs, ideal for single-device replacement, multi-cell power banks, e-bike packs, or bulk DIY projects.
Parameters
| Parameter | Specification |
|---|---|
| Brand | Samsung |
| Model | INR21700-58E |
| Size | 21700 (21mm diameter x 70mm length) |
| Chemistry | Lithium-Ion (Li-ion) |
| Nominal Capacity | 5500mAh |
| Nominal Voltage | 3.6V / 3.7V |
| Max Charge Voltage | 4.2V ± 0.05V |
| Discharge Cut-off Voltage | 2.5V |
| Max Continuous Discharge Current (CDR) | 11A |
| Internal Resistance | ≤ 30mΩ (typical) |
| Cycle Life | ≥ 500 cycles (to 80% capacity) |
| Top Type | Button Top / Flat Top / Nickel Tab / Protected Top / Pre-wired |
| Protection | Unprotected (bare cell) / Protected (Protected Top variant) |
| Weight | Approx. 70g / cell |
| Pack Quantity | 1, 2, 4, 6, 8, 10 Pcs |
Applications
High-Performance Flashlights: Powers high-lumen tactical and EDC flashlights with extended runtime.
High-Capacity Power Banks: Build a massive power bank with multiple cells in parallel. The 11A rating supports fast-charging protocols.
E-Bikes & E-Scooters: Ideal for building custom battery packs requiring high capacity and stable discharge.
DIY Battery Packs: Perfect for robotics, portable power stations, and custom high-capacity projects.
Portable Fans & Camping Gear: Long runtime for outdoor and emergency use.
Not Suitable For: High-drain power tools (>15A continuous), high-power vaping (sub-ohm/mechanical mods), or devices requiring extreme current output. For those applications, choose dedicated high-drain cells like the Samsung 30T or 40T.
FAQ
Q1: What is the actual capacity of this battery?
A: The Samsung 58E has a nominal capacity of 5500mAh, one of the highest available in the 21700 form factor.
Q2: What devices is this battery best suited for?
A: It is ideal for devices that draw 11A or less and require maximum runtime: high-performance flashlights, power banks, e-bikes, portable fans, and DIY battery packs.
Q3: Can I use this battery for high-power vaping or power tools?
A: No. The Samsung 58E is a high-capacity cell with an 11A continuous discharge rating. High-power vaping and power tools typically require 20-40A continuous. For those applications, choose dedicated high-drain cells such as the Samsung 30T (35A) or 40T (35A).
Q4: What is the difference between the terminal options?
A: Button Top has a raised positive terminal for spring-loaded devices. Flat Top has a flat terminal for spot-welding and standard contacts. Nickel Tab is pre-welded with nickel strips for custom battery pack assembly. Protected Top includes a built-in protection circuit against overcharge, over-discharge, and short circuit. Pre-wired with Leads comes with attached wires for easy connection.
Q5: Does this battery have a protection circuit?
A: The standard Button Top, Flat Top, Nickel Tab, and Pre-wired versions are unprotected bare cells. The Protected Top variant includes a built-in protection circuit. For multi-cell packs, always use an external BMS.
Q6: How should I store these cells when not in use?
A: Store at 3.6-3.7V (approximately 40-50% charge) in a cool, dry place. Use non-conductive battery cases to prevent accidental short circuits. Avoid storing fully charged or deeply discharged for extended periods.
Q7: Which terminal type should I choose?
A: Choose Button Top for devices with recessed battery compartments. Choose Flat Top for standard spring-contact devices and spot-welding. Choose Nickel Tab or Pre-wired for custom battery pack assembly. Choose Protected Top for devices requiring built-in overcharge/over-discharge protection.
Q8: How many batteries come in one pack?
A: This product is available in 1, 2, 4, 6, 8, and 10 pack options. Please select your desired quantity from the dropdown menu before adding to cart.
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