This is a universal and high quality Li Ion Cell having 3000mA capacity with 3.7v. Its Dyson Company manufactured cell for high performance applications like electric vehicles, vaccume pumps, portable tools and other high performance demands.  

Datasheets

Product and usage information:

•  Dyson rechargeable battery INR - 20700A remove the machine, discharge current 30A
• Discharging 2.50V Cutoff 560mA Standard
  35000mA Maximum
•  20700 round Li-ion cell type.
•  Nominal voltage: 3.7v.
•  Full voltage (fully charged): 4.2v.
•  Internal resistance: <20mOhm
•  INR code - 20700A.
• Capacity: 3000mAh.
• -Actual capacity: about 2500mAh (ranging from 2000mAh - 2900mAh)
• Condition: Used, removed from genuine Dyson battery
• Pictures are taken in real time at the Store.
  
  

A 20700 battery is a type of lithium-ion rechargeable battery that has a diameter of 20 mm and a length of 70 mm. The name 20700 comes from the dimensions of the battery: 20 mm x 70 mm123

Some additional information about 20700 batteries are:

They are often used in high-power devices such as electric vehicles, power tools, and vaping mods243
They have a higher energy density and capacity than the more common 18650 batteries, which are 18 mm x 65 mm23
They are compatible with some devices that use 21700 batteries, which are slightly larger at 21 mm x 70 mm53

Package Includes:

•  Price for 1 cell (tablet).

Note: This is a used product, the cells are not identical. Therefore, it is necessary to charge, balance the cell and carefully measure the parameters of the battery before using it
- If used for machine tool batteries, combine many cells together into a battery block, need to charge and balance cells. After that, measure and select cells with equal voltage, internal resistance and capacity, and then pair up to form a battery block
- If using individual cells, flashlight batteries or as backup batteries (ie cells are only connected in parallel, not in series), it is possible to use only fully charged cells.