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HarryA

In the bowels of: Laptop battery

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For those who have not peeked in to a laptop battery the photo shows the interior of one.
The battery is made up of 6 lithium ion cells of 3.7 voltages each in three pairs.
Connected to each pair are connections for balanced charging. This battery does not have
thermistors for monitoring temperature during charging as some do.

At the upper left is a larger SMD IC that is most likely the processor or brains of the battery.
To the right of the IC is a tan rectangle with a red dot on it. This is a switch that can be
press through the case. It is used to display the status of the battery by the 5 LEDs just to
the right of the switch at the upper edge of the PCB. There are 2 more SMD ICs at the upper right.

 

LTbattery.jpg

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