Some old Laptop battery. You can reuse the cells for plenty of other applications.

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exterior of the housing of the li-ion battery.
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exterior of the housing of the li-ion battery.
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housing with the batteries under a protective black sheet. The batteries are 18650 types. The brands are Panasonic CGR18650H. You can find all sorts of brands like Bosch, Sony, Ultrafire, etc…
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this is an old one as there is a connector which can be useful if you want to reuse the battery pack
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Here the control board of the li-ion battery pack.
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Here the light cover for the LED charge indicator of the li-ion battery pack.
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18650 made in Japan by Panasonic
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