Technical challenges remain, including integrating a leakproof backup battery into the device and miniaturising the FREE-D’s control electronics.
存在的技术难题还很多，包括将一个防漏电的备用电池集成到心泵内，还有缩小FREE-D电子元件的体积。
The backup battery should be replaced at least once per year.
每年应该至少更换一次备用电池。
Intelligent battery discharger is the instrument that can maintain and capacity test to battery, DC power and UPS backup battery.
智能蓄电池放电仪是专门对蓄电池组、直流电源、UPS后备电池进行维护及容量检测的仪器。
Intelligent battery discharger is the instrument that can maintain and capacity test to battery, DC power and UPS backup battery.
智能蓄电池放电仪是专门对蓄电池组、直流电源、UPS后备电池进行维护及容量检测的仪器。
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