Open a Lenovo 3000 G410 Battery

One of the common problems with laptops is the deteriorating performance of its battery. Laptop batteries are made up of Lithium Ion (Li-ion). I have a laptop that is more than a year old. Last week, its battery went totally dead. I'm still looking for a replacement. I'm very careful in finding one because most cheap alternatives are poor in performance (with only 45 mins up time compared to the original 3-4 hours). Some are overly priced. I now have a prospect seller and will be purchasing after this post. Well, to continue, out of my curiosity, I opened the battery. The laptop is a Lenovo 3000 G410. Before my exploration, I took the specifications of the battery. It turned out that it's manufactured by SANYO. Here are the specifications:

Battery name: PABAS024
Unique ID: 3658QSANYO PABAS024
Chemistry: LION

I really don't have any knowledge about the hardware. All I know is that it can be charged and discharged. Despite my limited knowledge, I still opened it up and here's how it looks like:
















There are six (6) cells inside which were all interconnected to a chip that would then be in contact with the laptop. I just don't know where the defect is but I observed that there is somewhat a burned section of the chip. I still need to check the other parts. I need a tester though.

It's really expensive to buy a new one but it's worth the experience. I now know the internals of a laptop battery and I'm on a quest to learn by myself on how to fix a laptop battery or at least how to replace those cells with an equivalent. It's quite dangerous but I'm up for the challenge.

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