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Drycell Battery - An innovation by the young inventor Sakizo Yai, who first applied the principle to use in powering an electronic clock. The drycell battery, in contrast to modern aggregated glass mat, or lead-acid, does not rely on a liquid conductor and instead, on a conductive paste that is laid into the body of the battery. Innocuous in itself, the potential for application is immense. Drycell batteries have a smaller profile and lighter weight than traditional batteries, and may be used to power smaller devices more practically. With the Japanese adoption of the German mechanized walker program, and innovating in their own fashion, the use of large drycell batteries permitted their version of the walker to not require reciprocating diesel engines to provide power and locomotion. Far quieter, far sleeker, and far less costly, as the Japanese Empire lacks an immediate natural source of petroleum.