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About this product
Product Identifiers
GTIN0611029134883
UPC0611029134883
eBay Product ID (ePID)1281195007
Product Key Features
Charger TypeUSB
ModelCrystal
Ratings and Reviews
Most relevant reviews
- Feb 27, 2018Top favorable review
A muwt tool with rechargeable usb-things
Great and simple to use tool. I can not be sure.how accurate it is, but after a short playing with it I found two ruined usb-cables, faulty wall socket charger and one under-capacity power bank. It is also a funny toy for techno enthusiasts... Good value for money spent.Verified purchase: YesCondition: New
- May 21, 2018Top critical review
Keweisi not accurate
However this tester is build well it does not meet sellers specification. Resolution step is 0.03 A not 0.01 This results in high error in mAh reading see photo 3. The first model is the older version with the COB chip This one is more accurate The second has a Holtek chip. Pity , it nice display and quality design but reading is very very inaccurate
Verified purchase: YesCondition: New
- Jun 28, 2017
Great features
It's very useful for measure voltage and current of usb ports, its display is easy to read and is capable to collect information about the amount of charge in mAh.Verified purchase: YesCondition: New
- Oct 04, 2016
Fun to see the specs of the charger, not for everyday use.
Interresting to see what current and voltage is being delivered. It does not however allow the full charge speed and current through. When plugging my Samsung Note, it tells me 1 hour to full charge. When plugged in through the voltmeter the time rise to almost 2 hours. Nice "toy" but not for everyday use.Verified purchase: YesCondition: New
- Mar 29, 2018
easy battery capacity tester up to 20 V 3A
for use with many battery types using a male and female USB cable with open ends testing both charge and discharge capacity .Verified purchase: YesCondition: New
- Nov 23, 2017
Great value testers!
Ordered 3 testers and results are stable and consistent on all 3 dongles. Testers allowed me to discard crappy USB cables and keep good QC3.0 & Type C capable cables for our newer phones and tablets.Verified purchase: YesCondition: New
- Sep 23, 2016
EXCELLENT!!
Very good quality USB and it does what it says. The values are right and is very stable. It's a good value.Verified purchase: YesCondition: New
- Dec 10, 2016
Excellent Product
Used few days now. Can see Voltage , Time , current and how much capacity transfer in "mah". If your battery capacity 3000 mah by using this you can find its true or not. Check with samsung fast charger. Voltage 9.15v. Seems everything ok with this.Verified purchase: YesCondition: New
- Aug 16, 2017
KEWEISI KWS-V20 Capacity USB Tester
Have tested this usb tester, and gives fairly good measurements,about mAh that is put in my mobile phone, thumbs up great gadget !!Verified purchase: YesCondition: New
- Aug 23, 2017
Useful
This is a great little voltage/current/time meter. The one I received was marked as max 20V which makes it much more generally useful than I was expecting. I modified it with a pair of plug/socket connections so that I can put it in-line with things that don't have usb connectors and monitor the power consumption. It would make a nice display on a small diy bench power supply.Verified purchase: YesCondition: New
