For the reason that transistors on the era couldn't handle high voltages, the DC voltage needed to be reduced to 25 volts by a substantial electricity transformer. Is it perilous to utilize a substantial output electric power charger, such as HP TouchPad just one, that has a minimal use http://cesariiuem.pointblog.net/The-Ultimate-Guide-To-apple-inc-in-2012-case-solution-15149312