LiFePO4 batteries and 18650 lithium-ion cells · OEM & ODM sales@sunderbattery.com
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18650 Lithium Battery

18650 lithium battery size is fixed. The single 18650 rechargeable battery cell can be assembled into different lithium ion battery packs, such as 7.4V, 12V, 14.8V and more.

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The 18650 can is 18.5mm across and 65.5mm long, and that never changes. What changes is how many go in series and how many in parallel, and that is what sets the voltage, the capacity and the current the pack can hold. A 3S20P gives 11.1V 40Ah. A 1S7P gives 3.7V 18Ah. A 4S1P gives 14.8V 2200mAh.

ICR18650 cells run at 3.7V nominal and charge to 4.2V, so they carry more energy per cell than LFP but a shorter cycle life, around 500 cycles. They are the right choice where run time and weight matter more than calendar life: tools, lighting, portable audio and e-bikes.

Who It Is For

  • Power tool and garden tool brands
  • E-bike and light electric vehicle builders
  • LED lighting, portable audio and sprayer manufacturers
  • Medical and instrument makers needing a compact 11.1V or 14.8V pack

Problems It Solves

  • Packs that run flat before the shift ends
  • Tool housings that will not take a wider or longer pack
  • Products that need a specific connector, not whatever the pack maker had in stock
8 products

Every 18650 Li-ion Battery We Publish

Each card links to a full data sheet with the parameter table and the model list for its range.

Where It Is Used

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Questions About 18650 Li-ion Battery

What is the cycle life of an 18650 lithium ion pack?

Around 500 cycles for the ICR18650 packs published here. If you need thousands of cycles, look at the LiFePO4 range instead.

What is the charge voltage of an 18650 cell?

An ICR18650 cell has a 3.7V nominal voltage and a 4.2V maximum charge voltage.

Can you build a pack to our own dimension?

Yes. The charge and discharge current can be customised and the dimension is made according to the device's request.

Which connector do you fit?

We have supplied JST-PHR-2P and molex among others. Tell us the mating part on your board and we will quote to it.

Quote The 18650 Li-ion Battery Range

Send the model you are comparing, or the voltage, capacity and space you have to work with.

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