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This gadget monitors the power draw of your USB devices... charging phones, batteries and running gadgets in general. It reads off the voltage as well as power draw and gives a running total of power drawn. This tells you how much has been drawn in total. There are 10 accumulator memories. But why? Well, one reason is that charging batteries up to 100% is less healthy than only charging then up to, say, 85%. When the power draw drops to about 40% what the original draw was, you're at around 85% charged. (Not always, you need to observe your device charging but that's the idea.) You can also monitor the power draw to check if it's charging at 'turbo' rate. Maybe swap cables, etc, to diagnose slow charging problems. Another use is to monitor, say, how much power your Power Bank is giving you. Charge up your Power Bank first then simply measure how much is used to recharge your phone. Then recharge your Power Bank again and monitor how much power for that recharge. There should not be too much difference. Lots of other uses. Read full review
Verified purchase: Yes | Condition: New
Now I am able to check the charging outputs of my various device chargers. This product is absolutely perfect for my needs. Now I know exactly which chargers are charging my devices at the correct amperage and volts. It's no longer a mystery. Not surprisingly I found some of my chargers' stated outputs were not at all accurate and caused my tablet to go flat while being used and charged at the same time. Now I can connect to known outputs with confidence.
Verified purchase: Yes | Condition: New
This item does exactly what I purchased it for, and is easy to use and the display is very easy to read. The item is well made and I wouldn’t have a problem recommending it to anyone.
Verified purchase: Yes | Condition: New
Verified purchase: Yes | Condition: New
great little product, does exactly what I need it to
Verified purchase: Yes | Condition: New