This backup battery is a price point leader
The thing about backup batteries is...how do you know when AVR is kicking in or that the battery was used at all??? This one is the cheapest price battery that gives you an LCD screen so you can push a button and see!!! Thats why its a price point leader. True that you could simply plug in the USB cable and download/install software to tell you - but what if the device you are trying to protect doesn't have a USB port???
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