Samsung 25R
(2500mAh/20A)

  • Sale
  • Regular price £3.85

Quantity Price
1 £3.85
2 £3.81
4 £3.79
8 £3.77
10 £3.75
15 £3.73
20 £3.70
50 £3.68

Fogstar will always provide a case for storage and protection, as well as safety information to protect our customers. There are several different grades of 18650 cells - and they are sorted into 3 bins (grades). A, B and C bins - We only offer 'A' grade cells at Fogstar.

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: 25R5/25R6/25RM
  • Manufacturer: Samsung SDI
  • Country of Origin: South Korea
  • Chemistry: INR (Hybrid)
  • Max. continuous discharge current: 20A (Rated by Mooch)
  • Nominal capacity: 2500 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)

The official specification sheet can be found here. (Please be aware, official specification sheets are usually compiled with battery pack manufacturers in mind, therefore - listed specifications may only be achievable with cooling or over multiple connected cells, we recommend you use our specifications listed above.)

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