First introduce the notebook computer with 18650 battery core usually capacity for 2200 mah (ma), can be interpreted as: 3.7 V voltage, 2200 ma (ma) current power supply, can use 1 hour (hour). Higher specifications of the capacity for 2400 mah, 2600 mah (sanyo battery core is in the majority, SONY laptop most USES 2600 mah specification).
The following with common 3.7 V / 2200 mah battery core as an example.
A, usually say three core Dell Latitude D830 Battery is three 18650 battery core series and the formation of the battery. The battery finally marking parameters for 11.1 V / 2200 mah. 11.1 V = 3.7 V × 3, series when output current constant still for 2200 mah.
Also have standard 10.8 V, i.e., a single battery core voltage drop causes lead to reduce the total voltage.
Now the market popular on the Internet for this specification battery.
Second, the four core battery have two kind of situations: four series and two string two and.
Four series battery final mark parameter is: 14.8 V / 2200 mah. 14.8 V = 3.7 V x 4, series when output current constant still for 2200 mah.
Two string is two and four Dell Studio 1535 battery core is divided into two groups, two two series after the parallel, battery final mark parameter is: 7.4 V / 4400 mah. 7.4 V = 3.7 V x 2, the output current for 4400 mah = 2200 mah x 2.
Now market medium size notebook (12.1 inches and 13.3 inches, etc) for this specification battery.
Three, six core battery, usually three series, i.e., two and six battery core points two groups of the three, three series after the parallel. The battery finally marking parameters for 11.1 V / 4400 mah. 11.1 V = 3.7 V × 3, the total capacity of 4400 mah = 2200 mah x 2.
Some high-profile notebook multi-purpose six core battery.
Of course there are six core above battery, such as nine core, etc.
How to see laptop battery capacity
To see so many, have to buy notebook friend asked, battery capacity exactly how to see? Four core batteries in four series (14.8 V / 2200 mah) and two string two and (7.4 V / 4400 mah) is the same, why a write 2200, a write 4400?
This will lead you to a concept, everyone know home appliances consume electricity is according to the “degree” calculation, 1 degree = 1000 wh (tile – hours). But the notebook battery power is small, with “degree” to measure obviously unreasonable, so now common international is “Wh” (tile – hour, namely per once).
Studied physical friends all know that W (tile, power unit) = V (V, voltage unit) x A (Ann, current unit), so, we can calculate 18650 battery core capacity of 3.7 V x 2200 mah = 8.14 Wh, so as to know three core battery capacity 8.14 by 3 = 24.42 Wh, four core battery capacity of 8.14 x 4 = 32.56 Wh, six core Dell Inspiron 15R N5010 battery capacity is 8.14 x 6 = 48.84 Wh.
And these data is exactly equal to the battery marking parameters of the product. Six core for example, 48.84 Wh = 11.1 V x 4400 mah.
See here, everybody should know how to see laptop battery capacity, not to see the back of the mAh, but calculate Wh.
Now notebook computer companies are according to the aviation law, the capacity of the battery will be clearly labeled Wh in the battery.
General SONY battery core for green skin black, the battery capacity is 2400 mah ~ 2600 mah. Sanyo Dell Inspiron 6400 battery core red one green head capacity for 2400 mah, shallow blue red one head of electricity for 2600 mah.
18650 battery core, its resolution method is see cover body color, but the color of different manufacturer was not the same, so the average person is difficult to distinguish the. Japanese sanyo hoary head, yellow head 1950 mah blue head 2000 mah 2200 mah red light blue head 2600 mah purple head 2800 mah yellow head (charging cut-off voltage of 4.35 v) 3000 mah resistance: 53 – and green head within 2400 mah light blue head 2600 mah panasonic 18650 capacity discriminant method of skin cell type capacity in the color blue cgr18650 1200 mah pink cgr18650 1350 mah yellow cgr18650hm 1600 mah orange cgr18650hg 1800 mah purple cgr18650HGL 1800 mah aqua cgr18650a 2000 mah.