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Another batch of brand-new Phicomm N1 stocks from Xianyu has arrived, and you can get them for around fifty yuan. My unit used OpenWrt as a bypass router and has been running for over two years and is still on duty. This S905D small hot hatch can handle three serious jobs, three things not to count on, and four checks before buying—all explained in one go. After reading, decide whether to buy it....

The blue light on my home camera flashed wildly in the middle of the night. I once thought it was being hacked, but after reading the manuals of six brands, I realized that smart device lights don't have national standards—the same orange can mean three different meanings. Comparing the lights of cameras, door locks, doorbells, speakers, robot vacuums, and sockets—plus three unwritten rules from the Mi family, you no longer guess blindly when looking at the lights....

My colleague's DS218j with 512MB memory stopped at DSM6.2 and lost its security updates. We switched to an N100 mini PC to install Feiniu, but the 180GB drive became a challenge. I went through files, snapshots, facial recognition databases, and backup files one by one: those that could be moved would copy online for three nights, those that couldn't be moved would find substitutes in advance, and old machines would run side by side for two weeks before making a purchase. Just copy the schedule....

Your phone signal at home is down to one bar, but WiFi is maxed out? The grid count is drawn by the phone manufacturer itself; dBm is the real number. I copied dBm from three points at home to see just how bad the master bedroom really is, and online "signal amplifiers" costing tens to hundreds are illegal—don't buy them. The four legitimate paths are sorted by their spending costs, and the most effective one costs nothing....

The 20,000mAh printed on the front of the power bank is the battery cell's account. If you really can spit out a rated capacity, you have to discount it by 60%, and only if you scroll to the small text on the back does it count. I started by talking about the battery failure on the cat's camera, calculating capacity, fast charging input, and boarding all at once, plus the 9.9 million mAh weighing reveal....

The 65W three-port GaN charger at home can run the laptop fully with a single port, but when the second phone is plugged in, the laptop drops to 45W and even cuts off power. I flipped out the distribution table on the back of the charger and checked it to explain how to divide power, why plugging into the second unit causes power cuts, and why port A is a secondary output—explained everything in one article....

My wife dug out a dozen chargers during a big cleaning and asked if they were all compatible. I measured each one with a multimeter before I could tell: the voltage must be exact, the current should be high but not small, and if the fast charger is plugged in, the device will automatically drop back to 5V. There are three other types of heads you must never mix in the drawer, so I'll note them down as well....

After Kobayashi's old NAS wouldn't light up, he wanted to get a four-bay hard drive cabinet worth over 400 yuan. The cabinet and NAS are completely different except for both having hard drives plugged in: the cabinet is a brainless warehouse that only recognizes one computer, while the NAS has a system manager that the whole family can connect. After using it for a month, RAID soldered in the cabinet, the computer was rebuilt, and the whole house was untouchable—you had to calculate everything before buying....

At 2 a.m., the speaker suddenly responded, "I'm here," and a week later, the bedroom night light turned on on by itself. I didn't unplug or reset the battery. I first checked Xiao Ai's speaker chat history, then checked the execution time of the Mi family scene. The real culprit in the two "paranormal events" was completely different: accidental wake-up, cat-triggered human sensors, forgotten alarms—each could be fixed by matching the numbers....

The e-commerce page says the NAS host costs 2,200, but when I received it, it was an empty shell with no drives, and it's normal for drives to be more expensive than machines. I calculated everything from a zero-yuan old laptop, a N100 mini PC priced at 1,100 yuan, a second-hand finished product priced around 2,000 yuan, to a brand-new four-bay drive in the 3,000 yuan range. I calculated all four budget tiers, including the tray and system, and copied them without wasting money....