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Short circuit protection Over-temperature protection and Overvoltage protection A durable and well-made laptop power adapter long term use PCB & Cover is manufactured with Fireproofing materials. Power Exchange Savings more than 5658% (More power exchange savings means less power wasting and working more efficient with your computer). Use temperature protection NTC. Use insulation paper to isolate electrodes. Use fire protection glue paper and silica gel for safety features it s security when notebook PC computer is working.