In the late 1940s Georg Neumann, a German engineer, succeeded in fine-tuning the battery's chemistry to avoid this problem, making a sealed version possible.

1940年代晚期，德国工程师Georg Neumann成功地微调了电池的化学机制，从而消除了这个问题，使得将之密封包装成为可能。

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The C and E Series (as well as the G Series for embedded applications like digital signage, set-top boxes, and game consoles and the Z Series, a 6 watt version aimed at passively cooled, sealed applications like tablets) are based on the same 75 square millimeter Brazos die.

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