Laptop Battery Cells Type ABCD

Most of the notebook battery is made up of cylindrical battery cells

The current notebook battery made from batteries cells by series-parallel connection, there are commonly 4, 6, 9 cells battery in the market.

4 cells = 2 series - 2 parallel

6 cells = 3 series - 2 parallel

9 cells = 3 series - 3 parallel

A cell voltage (unit: Volt) = 3.6V or 3.7V

A cell electric quantity (unit: Ah) = 1.8/2.0/2.2/2.4/2.6/2.8AH

Mainstream notebooks are the 3-series 3-parallel 9-cell battery, we descrip the composition of the battery take an example of dell 6400 battery below.
We assume that cell voltage u = 3.7V; 2.2AH (batteries electricity = AH)

Since 3 conspiracy, so the battery voltage U total = 3.7V * 3 = 11.1V

Since 2 and, therefore, the battery charge = 2.2* 3 = 6.6AH (AH)

Battery module total capacity = 11.1 * 6.6 = 73WH

Minimum load notebook power state for 13w (ideal)

Battery time = 73WH/13W = 5.6 hours

Note: the above data for all of us understand the principles set by the battery composition, different manufacturers battery not identical

The Types of Batteries Cell

Manufacturers classified into four categories ABCD ( Sanyo distinction, Sanyo and Panasonic distinction mode actually has become industry standards) in the production of the identical batch depending on the battery discharge test performance, a = 2000MAH, b = 2200MAH, c = 2600MAH, d=2400MAH, print distinguish code on ABCD in the battery, and then simultaneously to distinguish by battery protection gas cover color (battery willproduct gas when discharge, batteries have a protective cap, deflated when the battery to a certain amount of time, that is to say will reach the design life quickly gas will lift the lid to open, allowing for battery removal), this is the source of ABCD, due to Sanyo and Panasonic strength, this also became the default distinction in the industry. Of course, this subject to restrictions on production technology, currently Sanyo stopped original 2400mah batteries internal material composition, formulation of new material instead, so that at present, the production of 2000-2600mah SANYO batteries, are virtually different quality products in identical line.

Sanyo 18650 Battery Cells Distinction

white head, yellow head    1950mah
Blue head                  2000mah
Red head                   2200mah within the internal resistance: 53-58
Green head                 2400mah
Light blue head            2600mah

Panasonic 18650 Battery Cells Distinction

model        capacity   color

blue         cgr18650     1200mah
pink         cgr18650     1350mah
yellow       cgr18650hm   1600mah
orange       cgr18650hg   1800mah
purple       cgr18650HGL  1800mah
light green  cgr18650a    2000mah
light red    cgr18650cb   2060mah
light blue   cgr18650c    2200mah