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1·The batteries are at the end of their useful life, suffering from sulfation, high internal resistance, and drastically lowered storage capacity.

电池是在他们最后的使用寿命，从痛苦可用、高内部阻力，大幅度降低了存储容量。

2·By using the interfaces used to connect the internal and the external hard discs and the external devices, the storage capacity can be enlarged infinitely.

由于使用了内置和外置硬盘和外部设备连接的接口，所以可以无限扩大存储的容量。