ZST MBT Battery Tester

This is a battery tester that measures the battery capacity and not its voltage, the capacity is a far better way to know how much juice the battery has left, in many batteries the voltage will be constant until the cell is near exaustion so measuring voltage has no purpose.

This model can measure more than 30 battery types, including Alkaline, Lithium and Rechargeable C, D, AA and AAA batteries. Primary and rechargeables 123 and CR2 batteries.18500, 17650, 18650, 3v lithium coin like CR2016 and CR2032. A23 batteries, 9v batteries, and many others. It is practical to say that it will be hard for you to have a battery type that can't be measured with this tester. 104500 batteries can be tested even if not listed and some smaller batteries like 10440s can also be tested but it is not recommended to test more than once because the test may take a margin of the battery charge.

Using the tester is very simple: Put the battery with the positive pointing down in its place and use the small probe in the negative contact, percentage of remaining battery capacity is indicated on the LED bar display. The test takes aproximately 2 seconds per cell.

Given that mixing lithium batteries with different charge in a flashlight can result in an explosion (according to several reports) the tester is a good way to know both cells are in the same state of charge. A very nice tester that can be used in a huge number of batteries.

You can read more or order for $60 from Lighthound.