Basen 21700 4000mAh

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  • Regular price £4.48


We recommend our customers fully charge cells before first use, using a dedicated battery charger rated for lithium-ion cells. Our selection can be found here. 


 Specifications: 

  • Model: BASEN21700
  • Country of Origin: China
  • Chemistry: NCR
  • Max. continuous discharge current: 20A (Rated by Mooch)
  • Nominal capacity: 4000 mAh
  • Nominal voltage: 3.6 V
  • Discharge end voltage: 2.5 V
  • Charging voltage: 4.20 +/- 0.05 V
  • Standard charging current: 1.5 A
  • Protection: Not Protected (Flat-Top)

Safety, storage and disposal

Lithium ion (Li-Ion) Cells can be dangerous if used improperly. By buying Li-ion batteries from Fogstar, the buyer assumes all associated risks.

  • Always use a battery charger that is rated for Li-ion cells
  • Batteries should never be left charging unattended
  • Batteries should never be loose in pocket or bag (use case provided)
  • All lithium batteries have a cycle-life, however a battery should be replaced every 2 years - whichever comes first.
  • Never continue to use a battery with a broken PVC wrap.
  • Never completely discharge batteries
  • Do not expose to extreme heat