Bests & Worsts Reviews from Amazon

The BT-C2000 Battery Charger Tester Analyzer offered here is the latest production model with firmware version 2.1. The way to tell the firmware version is to look at the leftmost column of the LCD display during power-up. The number '2.1' is briefly displayed. I have previously evaluated an older (pre-production) version of BT-C2000 Battery Charger Tester Analyzer with firmware v2.0 (read my review on it for details). I liked the charger very much, because it combines the best features from La Crosse BC1000 and Maha MH-C9000. But there were two functions I miss: 1. I wish to measure the remaining charge in a battery using DISCHARGE function, and 2. I wish to monitor the improvement in capacity during REFRESH operation. The final production model is supposed to have fixed #1. This latest firmware update has fixed #2, plus some minor refinements. Here are the differences between v2.1 and v2.0: - In v2.1 DISCHARGE/REFRESH operation, the 'mAh' reading is continuously updated during the first Discharge stage. Once the Charging stage starts, the 'mAh' reading stays frozen. During subsequent Discharge stages, the 'mAh' reading stays frozen UNLESS the new capacity number is larger than the previous one. This makes it possible to monitor the improvement in capacity during REFRESH operation. (In v2.0, the 'mAh' reading is updated during Charging stage, which makes it useless information) - SLOT selection button behaves differently now. When I press the SLOT button multiple times, the charger now selects Cell#1, 2, 3, 4, ALL, NONE. Previously it just cycles from 1 to 4 forever. - The LCD backlight now stays on for 30 sec after the last keystroke. In old version it stays on for 10 sec only, so for example when I do a 'Quick Test', the light goes off just before the readings show up. - The charger now stops charging when cell voltage exceeds 1.75V. Presumably this is to detect Alkaline cell and reject it. But I'm not sure how useful this function is in practice. When I purposely tried charging a new alkaline cell at 400mA setting, the charging current drops as the voltage goes higher, from 400mA down to about 250mA at 1.7V. By the time it reaches 1.75V, the charger stops and shows 'Full' instead of 'Error'. Bottom Line: With the latest firmware update, I consider the BT-C2000 to be a better charger than both BC1000 and MH-C9000. It is now my ultimate advanced charger - at least until I get the itch to find another new toy... [Full Disclosure] I was sent (unsolicited) this unit for my evaluation.