XCLUMA USB Charger Doctor Mobile Power Detector Battery Test Voltage Current Meter

This product shows us very crucial details that can help you decide on the validity on that dodgy powerbank you bought online.First off, the voltmeter function allows us to check the stability of the usb controller/circuit.Second, the ammeter is a good metric, along with the time metric.Thirdly, the mah reading is pretty accurate to check batteries of power banks and phones.

Good quality

Excellent Product 👍 Value for Money 🤑 💰live monitoring ❤️ rough and tough ✅

- After using a lot of months giving this review, this product just works fine.- This USB device does not support charging concepts like Dash, Vooc ( or super Vooc), and Q-Quick charge and alsomax 3.0 Amps, when it touches 3.0 Amps the device gets more heat and this device definitely consume somecurrent for running the device, if you take any measurement you consider 20 to 50 mah difference, and in somesituations more mah also.- I used this device for multiple devices under Rs.1000/- or max 10,000 mah PB (Power Banks like Li-on, and Li-polymer) I got a some understand how the power banks work when you use this device in between, you will getdifferent value and if you charge with the given Power adaptors you get a different value, this device interrupts youcharging concept, anyway slow charging of the battery only helps in the long life of the battery.- when I checked 20,000 mah PB it was giving output only of 12000 to 12685 mah only- For example, if you take an 18W IN supported PB and but you change it max 10W IN adaptor you will get a value(by using this USB measuring device) and for the same 18W (PB) you use a max 15W adapter and charge it you get adifferent value, as per the given specification of the device it supports 4V-20V and current is 3A max, so we need aperfect adaptor and perfect cable with supports max 3A and perfect phone or PB with supports given parameters- On an average, if 10,000 mah PB of Li-on 10W max in and out, takes' in avg of 8682 mah and given output of 6068mah and this value (6068) differ if you charge a phone instead of PB to PB- On an average, if the same 10,000 mah PB of Li-Po with max 18W in and max 15W out, you get an input value of7062 mah and an output value of 6352 by using this device in between to measure (differs from phone to phoneand PB to PB)- And using the same 10,000 mah PW, max input of18W (5V/3A or 9V/2A) and max output of18W like this (5V/3Aor 9V/2A or 12V/1.5A) you get value like this input 8281 mah and output of 6068 ( differs slightly varies if theinput and output charing concept is different)- Overall this device gives users an average of approx value in real-time conditions because we have a lot of chargingspeed in this present world. Companies use different speeds for different phones, You need to use more precisemeasuring devices for those charging concepts. In my option 10W in and out works fine and you will get battery lifein a better and long run. But 10W is a slow charging speed in the present world.- If any PB gives 10,000 or 20,000 mah PB or even more mah, you will get a lot of loss in charging and discharging because of set-up and set-down of charge, in any PB you have a loss of a minimum of 20 to 35% when discharging the power from (PB) it, even in mobile phone also. So this product is just ok for approximate measurements approx

I like the product and working well. Value for th.e mony

Good

Works only for Quick Charge 2.0 and 3.0. Haven't tested for QC 4.0. Doesn't work for Realme Dart Chrage, OnePlus Warp Charge, Oppo VOOC charge. Also this only supports USB 2.0. Doesn't support USB 3.0.Reading is fairly accurate and no heating or bottle necking issue for supported charging standards. Tested upto 12V and 2.5A and has been reliable.

Value for money