Hey you all. It turns out that my spare battery were also dead. Got a new one and everything works fine now. Thanks for the tip of looking into the date/hour, it helped a lot. Ty all for the help.
Ha ha.
You should buy the cheapest multimeter for testing battery and power supply voltages.
Also check out this rookie equipment list
https://bitcointalk.org/index.php?topic=5304666.msg55968262#msg55968262The sooner you learn how to do the simplest diagnostics, the less profit you will lose when mining farms are idle.