Sanyo NCR20700B 3.7V 4000mAh High Drain 15A Continuous Discharge Rechargeable Lithium Battery (Flat Top)

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The Sanyo NCR 20700B is a new 20700 sized battery.  It's a little bigger than an 18650 but packs a lot of energy.  The NCR20700B is the more energy density oriented version of the two 20700 batteries that Sanyo is currently selling, at a huge 4000-4250mAh while still supporting 15A continuous discharge

You can see the size difference between it & the typical 18650 flat top in the 2nd picture. Do take note there are 2 different text inks for this Sanyo NCR20700B (2 different batches) 



  • Capacity (Ah): 4000mAh
  • Charging Voltage (V): 4.2 V
  • Nominal Voltage (V): 3.6V-3.7V
  • Weight max. (g): 61.2
  • Dimensions: 70.3mm (L) x 20.35 mm (D) 
  • Max. Continuous Discharge rate: 15A (15000 mA)
  • Top (positive side): Flat top
  • Made by Sanyo/Panasonic Corp (Japan)


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