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Cylindrical 21700 lithium-ion cell, flat terminals, light blue wrap

DUSLAN

DUSLAN 3.7V IMR 21700 5000 mAh standard battery

SKU CH-3W1V-TZZDG

A 3.6 V 21700 lithium-ion cell delivering 5000 mAh with a flat-top terminal and 1.5 C maximum discharge

  • Battery typeBuffer 82580
  • High 5000 mAh capacity powers devices longer
  • 6 V nominal voltage matches standard Li-ion requirements
  • 7275 mA maximum discharge current supports high-drain applications
  • 44 mm diameter fits 21700 battery compartments
  • 70 g lightweight design adds minimal bulk

Battery type and intended use

This DUSLAN cell is a 3.7 volt IMR 21700 lithium-ion battery rated at 5000 mAh. It suits devices that accept a flat-top 21700 format and require high energy density without memory effect. Builders assembling custom packs or powering compatible mods and torches can use it. Users without lithium-ion charging knowledge or equipment should not handle this cell.

Charge and discharge limits

The nominal voltage is 3.6 volts with a charging ceiling of 4.2 volts and a cutoff of 2.50 volts. Standard charge runs at 0.3C (1455 mA) and maximum charge at 0.7C (3395 mA). Standard discharge is 0.2C (970 mA) while peak discharge reaches 1.5C (7275 mA). Exceeding these currents or voltages risks venting or fire.

Installation notes and common mistakes

The cell measures 21.44 mm diameter by 70.8 mm height and weighs 70 g. Its flat terminals on both ends demand correct polarity orientation in a suitable holder or spot-welded pack. Soldering directly to the casing causes overheating and failure. Always use a dedicated lithium-ion charger that respects the 4.2 volt limit and never leave charging unattended.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $17.99
Pricier than about 73% of the 10,440 comparable items (median $10.99).

Specifications

Power
Battery typeBuffer 82580

Questions about this item

Which capacity version of the DUSLAN 21700 battery should I pick for longest runtime?

The single listed capacity is 5000 mAh; choose this version for the maximum energy the cell provides.

What does the 5000 mAh rating mean for actual use in a device?

It indicates the cell can deliver 5000 milliampere-hours at the standard discharge current of 970 mA, giving roughly five hours at that load before reaching the 2.50 V cutoff.

What charging standard applies and what current limit does it enforce?

The cell charges to 4.2 V using a CC/CV profile; the standard charge current is 1455 mA (0.3C) and the maximum allowed is 3395 mA (0.7C).

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