Samsung INR21700 40T 4000mAh 30A High Drain Rechargeable Lithium Battery


The INR21700-40T by Samsung has close to legendary status with up to 4,000mAh of capacity and 30A of continuous discharge. A super powerful battery which can hold a large capacity as well.



  • Capacity (Ah): 4000mAh
  • Charging Voltage (V): 4.2 V
  • Nominal Voltage (V): 3.6V-3.7V
  • Weight max. (g): 66.8
  • Dimensions: 70.2 mm (L) x 21.1 mm (D) 
  • Max. Continuous Discharge rate: 30A 
  • Top (positive side): Flat top


Regarding Exchanges/Warranty

Due to the nature of this consumable product, no returns/exchanges with this product or other replacements are allowed unless the product is DOA

Warranty coverage will be 3 Months Full Warranty (against explosions/leakage/venting) unless battery has been found to be pushed beyond its stated specs, misused or over-discharged 



  • CAUTION: when working with Li-ion cells, they are very sensitive to charging characteristics and may explode if mis-handled
  • User should have enough knowledge on Li-Ion rechargeable batteries in charging, discharging,and assembly before use
  • Put the batteries in fire-proof container when bringing them out or when they are not in use
  • Do not put batteries on wood surface, carpets or flammable materials when charging
  • Never leave battery un-attended when charging (especially overnight)
  • We are not responsible for any damage(s) to property or injuries if there is any modification of the batteries in form, shape, or when made into packs
  • We are not reponsible for any damage(s) to property or injuries arising from possible explosions, leaks or fires resulting from the use or misuse/mishandling of these Li-Ion batteries