Without further ado let's take a look at the Li-ion Battery Tester.
This handy little device promises to measure the voltage, current, and capacity of 18350/18650/26650 lithium batteries with a resolution of 0.1 and an accuracy of ±2%.

In terms of performance this battery tester is a top performer in its class. With a voltage range of 2.8-30.0V and a current range of 0-10.0A, it can handle a wide variety of batteries with ease. The compact size of 42 x 19 x 12mm makes it easy to carry around in your toolkit or pocket, and the LCD display of 25 x 12mm provides clear and concise readings. The working temperature range of -10℃ to 40℃ ensures that you can use it in a variety of settings without any issues.

On the positive side the Li-ion Battery Tester is incredibly accurate and easy to use. The instructions for setting the cut off and full voltage are clear and concise, and calibrating the device is a breeze. The compact size makes it easy to carry around, but it may be too small for some users who prefer a larger display. Additionally, some users have reported that this battery tester does not come with a bezel like other models which may be disappointing for some.

Overall the Li-ion Battery Tester is worth checking out if you're in the market for a reliable and accurate battery tester. It may be small, but it packs a punch when it comes to performance. If you're looking for a compact and easy-to-use device to measure the voltage, current, and capacity of your lithium batteries then this is definitely worth considering.