What is the voltage of two Li ion 18650 batteries connected in series?

1.Series and Parallel Connection Mode of Lithium Battery

What voltage should I charge my 18650 battery at?

18650 lithium-ion batteries are charged up to 4.2V and down to between 2V and 3V depending on the cell’s specification for cut-off voltage. To be safe, never discharge lower than 3.0V unless you know your cell’s specification.

Can you parallel 18650 batteries?

It is possible to charge 18650 batteries in parallel safely, provided the following conditions are met: all batteries must be nominally identical (which means they must be of the same age, type, voltage rating, size and capacity).

What is the voltage range of an 18650 battery?

The 18650 cell has voltage of 3.7v and has between 1800mAh and 3500mAh (mili-amp-hours). 18650s may have a voltage range between 2.5 volts and 4.2 volts, or a charging voltage of 4.2 volts, but the nominal voltage of a standard 18650 is 3.7 volts. There are two types; protected and unprotected. We absolutely recommend protected 18650 batteries.

What should I do with damaged 18650 batteries?

Unprotected batteries should only be used where the load/draw and charging is externally monitored and controlled. Properly dispose of any damaged 18650 batteries at a battery recycling center. The protected batteries normally have a “button top”, but check the specs to make sure.

Are the 21700 and 18650 batteries interchangeable?

The 21700 at 1550 cubic mm, is larger than the 18650 battery – the 21700 and 18650 is not interchangeable. Protected vs Unprotected 18650 Batteries?

What is the voltage of a 3×18650 battery?

3 x 18650 LiIons (or any 3 LiIons) will have a fully charged voltage of 3 x 4.2V = 12.6V and a fully discharged voltage of ABOUT 3 x 3 = 9V. How low low goes is up to you. Too low and battery dies.