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Rectangular blue PVC-wrapped pack, two 18650 cells side by side, red and black 18-gauge wire leads exiting one end

DUSLAN

DUSLAN 7.4 V 2600 mAh lithium-ion battery pack

SKU CH-4QHP-ZA1WH

7.4 V 2600 mAh lithium-ion pack with built-in protection IC and 4.2 A polyswitch

  • Battery TypeBattery Pack
  • 2600 mAh capacity powers devices longer
  • Built-in protection IC prevents over-charge and over-discharge
  • 2 A polyswitch limits peak current for safe operation
  • Two 18650 cells in compact 2.8" × 1.45" × .8" PVC-wrapped pack
  • Lithium-ion chemistry gives light weight and no memory effect

7.4 V 2600 mAh lithium-ion pack

This 7.4 V lithium-ion battery pack contains two 18650 cells in series and delivers 2600 mAh of capacity. An on-board protection IC guards against over-charge above 8.4 V, over-discharge below 5.5 V and short circuits. A 4.2 A polyswitch limits peak discharge current. The module is wrapped in PVC shrink and fitted with 18 G wire leads for direct soldering.

Replaces loose 18650 cells

The pack replaces hand-wired pairs of 18650 cells that lack integrated protection circuitry. The jump is worth it when a project needs a ready-made 7.4 V source with built-in safeguards and a compact 2.8 by 1.45 by .8 inch form factor. It is not suited for applications that require higher voltage, greater capacity or user-replaceable cells.

Sustained load behaviour

Under continuous draw the 4.2 A polyswitch caps output current, so loads that exceed this limit will see voltage sag or shutdown. The protection IC maintains cell balance and prevents damage during prolonged discharge down to the 5.5 V cut-off. Recharging at the recommended 1 A rate restores full capacity without stressing the chemistry, while the 2.5 A maximum rate shortens cycle life if used regularly.

Highlights

  • 2600 mAh capacity powers devices longer
  • Built-in protection IC prevents over-charge and over-discharge
  • 2 A polyswitch limits peak current for safe operation
  • Two 18650 cells in compact 2.8" × 1.45" × .8" PVC-wrapped pack
  • Lithium-ion chemistry gives light weight and no memory effect

Specifications

Battery TypeBattery Pack

Questions about this item

What are the exact length, width and height of this 2 × 18650 pack?

The pack measures 2.8 inches long, 1.45 inches wide and 0.8 inches high.

What charger current should I set for the 7.4 V 2600 mAh pack, and what mistake do users make?

Use a 1 A charge rate; the common error is pushing 2.5 A, which is the absolute maximum, not the recommended setting.

When will the internal polyswitch or protection IC need replacement on this battery?

The 4.2 A polyswitch and 5 A PCB are non-replaceable; if they trip permanently the whole pack must be replaced.

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