Battery 101


18350 Li-Ion 700mAh FLAT TOP

These 18350 Li-Ion 700mAh flat top cell is a type of rechargeable lithium-ion battery that is cylindrical in shape and measures 18mm in diameter and 35mm in length. The "flat top" refers to a top that is flush on the positive end of the battery that makes contact with the device it is powering.

They have a nominal voltage of 3.7V and a max charge voltage of 4.2V and are ideal for applications such as torches, flashlights, modems, cordless telephones, solar lights and much more. 



  • Type: 18350
  • Chemistry: Li-Ion
  • Size approx. Diameter 18.2 x Length 34.4mm
  • Positive Cap: Flat top
  • Nominal voltage: 3.70V
  • End-of-charge voltage: 4.20V
  • End-of-discharge Voltage: 3V
  • Typical Capacity: 700mAh
  • Max Discharge Current: 14A
  • Max Charge Current: 0.7A
  • Weight: Approx. 21.5g
  • Protected: UNPROTECTED 


      Note: Ensure batteries are fully charged to reach full capacity. Failure to do so may lead to long term cell issues.


      Usage & Charging

      !!!!! IMPORTANT!!!!! These are immensely powerful cells, and extreme care should be taken using them. Only use with brand name, quality chargers (like LiitoKala, Nitecore, XTAR) and equipment! Unfortunately, we cannot replace batteries that are damaged by non-compliant chargers or equipment. There are so many chargers on the market, we cannot possibly keep track of which ones will work with these batteries. You will have to contact the charger manufacturer to ensure it can charge these batteries without damaging them. Please ensure you only use these (or any other Lithium Ion) batteries with proper Lithium-Ion chargers and equipment. Lithium-Ion batteries can easily be damaged by charging them with too high current or exceeding the maximum rated current discharge. 

      Use at your own risk. We do NOT accept any responsibly for damage, injury or death caused by improper use of these batteries!

      • Do not overcharge! Ensure the charger voltage does not exceed the batteries stated full charge voltage.
      • Do not over-discharge! Ensure the equipment you use do not draw more current than the batteries “Maximum Continuous Discharge Current”.
      • Do not leave batteries discharged for a long period! Leaving Li-Ion batteries in a discharged state can incur irreversible damage – creating a loss in capacity and a loss in cycles.


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