Review on ⚡ Battery Charger Analyzer Tester: BT-C2400 for AA AAA NiMH NiCd Rechargeable Batteries - Comprehensive Analysis and Charging Efficiency by Patricia Williams

Media could not be loaded. I purchased this charger in December 2015 and received version 2.2 which to my knowledge is the latest at the time of this writing. This is the same charger as the BT-C2000 but includes C/D battery adapters. Before writing this review I tested over 15 sets of four batteries in different modes. This is an unsolicited review. The charger comes with an AC adapter and a one-sheet manual with small print on both sides. The network adapter that I received at the exit is 12V 1A and can work with an input voltage of 100-240V AC. The instructions are fairly easy to understand for those familiar with advanced chargers and/or basic batteries and electronics. Those who do not distinguish watts from milliohms will not fully understand the instructions or capabilities of this or any other advanced charger. However, using the charger in its simplest mode requires no reading or understanding. Just insert the batteries and wait for the display to show 'Full'. Things are much simpler instead of trying to wing it. By default, the charger is set to a basic charge of 400 mA, which should be suitable for AAA or AA batteries, charging stops are determined using the -dV method (with overheating protection). External slot current adjustable between 200-1400mA, internal slot 200-1000mA, each individually adjustable in 200mA steps. The discharge mode will discharge to 0.9V, then stop and display the amount of mAh produced by the battery. In discharge-refresh mode, the device will discharge/charge 3 times and save the last battery capacity (mAh discharged) for display. Charge test charges/discharges/charges and displays battery capacity (mAh discharge). The quick test shows the internal resistance in milliohms, but is only accurate with AA and AAA batteries, not when using a C/D adapter. It appears that many of the issues reported with previous versions of this charger have been fixed. I didn't experience any overheating, there are rubber feet on the bottom of the charger to give it some lift and keep it stable, and the batteries don't feel too tight when you insert them into the charger, leaving the negative battery terminal intact. Room for improvement and this is no exception. It takes more than just pressing the current button to change the amperage once the cycle has started, you need to reset the mode again by using the mode button to scroll through all of them, then you can change the amperage, it would be nice if you could could change the current mid-cycle, but that's a quirk I can live with. A slot button for each slot would be better than toggling between them, I'm sure it was a cost issue for a feature only used occasionally. In more complex modes such as charge-test or discharge-refresh, it is not clear which phase of the cycle the charger is in. From the display parameters you can at least see whether charging or discharging is taking place, but not which one is passed with Discharge Refresh. It would be nice to be able to immediately see what it's doing without pressing any buttons. It would also be nice if the accumulated mAh were not reset when the battery was removed, but when a new battery was inserted. These are all UI issues that don't affect the core work that needs to be done. Overall I am very satisfied and hope that the Opus BT-C2400 will serve me well for many years to come. I will try to answer all questions. left in the comments. Let me know if this review was helpful by clicking Yes below.