Lithium Ion Battery
Revision as of 20:40, 4 November 2016 by Cmditradmin (talk | contribs)
<math>
\label{eq1} \begin{split} A & = \frac{\pi r^2}{2} \\
& = \frac{1}{2} \pi r^2
\end{split}
</math>
<math>
\label{eq1} \begin{split} A & = \frac{\pi r^2}{2} \\
& = \frac{1}{2} \pi r^2
\end{split}
</math>