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SSUNDERLFP & 18650 POWER
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Blue ICR18650 lithium-ion cells
18650 Li-ion

18650 lithium-ion cells and the packs built from them

The 18650 can never changes size: 18.5mm in diameter, 65.5mm long. What we change is the layout. Three in series by twenty in parallel (3S20P) gives 11.1V and 40Ah; 1S7P gives 3.7V and 18Ah; 4S1P gives 14.8V and 2200mAh.

ICR18650 cells run at 3.7V nominal and top out at 4.2V. That buys more energy per cell than LFP in exchange for a shorter life of roughly 500 cycles — a good trade when run time and weight matter more than years of service.

Ø18.5 × 65.5 mmcell size
3.7V / 4.2Vnominal / charge voltage
about 500typical cycle life
8models on the catalogue
Request pricingFull data sheet on sunderbattery.com

Who orders 18650 packs

  • Power-tool and garden-tool brands
  • E-bike and light electric vehicle builders
  • Makers of LED lights, portable speakers and sprayers
  • Medical and instrument companies wanting a compact 11.1V or 14.8V pack

Typical complaints we solve

  • Packs that die before the working shift is over
  • Tool housings with no room for a wider or longer pack
  • Products that need one particular connector fitted
Shrink-wrapped 18650 pack with red and black leads
Examples

Selected 18650 models

PackLayoutSize (mm)
11.1V 40AhICR18650 3S20P190 × 115 × 75
11.1V 18Ah tool packICR18650 3S9P57 × 170 × 70
14.8V 2200mAhICR18650 4S1P38 × 38 × 70
12V 4400mAhICR18650 3S2P19 × 115 × 70
E-bike pack, 10Ah24V / 36V / 48V options—

Need a variation?

Arrangement, case, terminal, cable, connector, label and dimensions can all be set to your equipment.

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