liutyi.infoPower-Z KM001C is USB Type-C tester from ChargerLAB. Nice and slim. With OLED display. With good PC Software. Have similar features to KM001 and same PC Software.
The main issue of Power-Z devices is no good English translation for both firmware and PC Software, But anyway it still a useful tool. And PC Software is actually best in class. Software updates are available at
This time OCRKJ D9-H. Which also can be found in some shops as unbranded LCD Digital Air Quality Monitor (AKA
It looks like relatively cheap SHT20 temperature and humidity sensor inside make it sort of a lottery if you will get correct measurements or not.
See device insides: https://wiki.liutyi.info/display/CO2/D9+Inside
SALE Price was: 102$
I was not expecting much ordering KKMOON K6 (and receiving actually OCRKJ K6). Which also known as CAFU K6. Because most of the portable air quality monitors I got before have at least one major issue with measurements (AiRead M3 – all measurements wrong, HT-501 – wrong temperature, AirRadio A6 – issues with CO2 measurement after outdoor use and wrong humidity measurements). AirVisual Node was the only exception that both portable and show correct numbers. But it just too big to put it in your pocket. So there was a long history of portable CO2 monitors with issues. And it was kind of a surprise that the device I bought for 83$ is both portable and displays more or less correct numbers.
See device insides: https://wiki.liutyi.info/display/CO2/K6+Inside
Price: ~100$ (sale price was 83$)
In the future fast charging might get some common ports and protocols. And it seems it will be type-c with USB Power Delivery in use in most cases. But for the moment it is several standards that provide more power than a standard USB port. Those standards are mostly not part of USB specification. And it is kind of unusual to have charger or power bank that support multiple fast charge protocols for different devices. That cause slower charging of some phones using charger or power bank designed for another. For example, at the moment most Qualcomm and Mediatek based Android smartphones have different fast charging standards. It took some time for me to find MTK-PE+QC3.0+Apple2.4 charger and power bank.
So the power bank is Tqka BA058
Awair 2-nd edition is a better version of Awair, that fix some known issues of first edition
SeekThermal CompactPro (300~500$ on Amazon) is an accessory that allows you to shot thermal photos or videos. Available for Android and iOS devices
Example video (time lapse done in an external application)
Umidigi Q1. 15 Watt Qi charger for Umidigi Z2 Pro (that is not yet released). It should also charge iPhones with 7.5W max.
Apple iPhone X charging time:
| 50% | 80% | 100% | |
| PC Port USB 2.0 | 03:00:00 | 04:40:00 | 06:10:00 |
| Umidigi Q1 | 01:28:00 | 02:28:00 | 03:34:00 |
| Apple 5W charger | 01:25:00 | 02:05:00 | 03:25:00 |
| Umidigi Q1 + extra fan | 00:55:00 | 01:48:00 | 02:40:00 |
| Apple 12W charger | 00:35:00 | 01:05:00 | 02:10:00 |
| Apple 29W charger | 00:30:00 | 00:55:00 | 01:55:00 |
Charge in case without extra cooling
Charge with no case and with additional external cooling
Portable CO2 meter and data logger with battery and good CO2 sensor inside.
The only really wrong thing about this device is it always show temperature higher than it is for about 2°C (for example 28.0°C instead of 26.0°C) and it is not something related to wrong sensor placement.
uHoo – most advanced air quality monitor, at least if consider a number of sensors. Including advanced sensor like CO, CO2, PM2.5, VOC, O3, NO2. And also traditional like temperature, humidity, and air pressure. Measurements look accurate enough.
The device does not have any local indicators. Not a single color LED to show air quality status. The only way it communicates with the world is Wi-Fi and mobile application. The application (v 3.8) or backend infrastructure that makes it work is unfortunately unstable. Also, an interface is poorly adapted to iPhone X.
uHoo is not portable due to many reasons like no local indication, no battery, need Wi-Fi (and new connection setup will take time).
Long time no Samsung. 🙂 Mostly because of the previous experience (read in Russian). But anyway did a test of Adaptive Fast Charging (AFC) from Samsung. Using Samsung S8 with AFC charger from the box.
What can I say?
I see some cheating with charging percentage displayed by the phone to get “Full Charge in 90 minutes” in reviews.
But the real numbers are more like 120 minutes.
Just to compare with a device that shows true percentage see image below
| 50% | 80% | Show 100% | Real 100% | |
| Apple iPhone 8 5v 12W charger | 00:28:00 | 00:51:00 | 01:41:00 | 01:41:00 |
| Samsung Galaxy S8 AFC | 00:44:00 | 01:08:00 | 01:28:00 | 01:56:00 |