Here is the battery removed from the aluminum case. The markings on the battery packs, showing through the thin paper, read " Made in China UPF497665M Sanyo B 9.5Wh 741-0005-A "

The individual battery packs, as well as the circuit boards, are held together in a thin plastic frame by the use of plenty of very sticky white paper.

Here is a look at the battery connector. The polarity is clearly marked. Even so the battery is rated as a 10.8V 50Wh, measuring the voltage on the - (black) and + (red) wires reveals 12V. This could mean that the voltage is reduced by the circuitry on the boards.