BT-C2400 Battery Charger Analyzer Tester for AA AAA NiMH NiCd rechargeable batteries Battery charger for AA AAA NiMH NiCd rechargeable batteries. Easy to setup and simple to use. Features four indepentant channels like having four chargers in one. Set up channels individually or all at once. Back lighted LCD display Digitally displays capacity, voltage, time elapsed and current for each battery channel. Charge, Discharge, Refresh , Test. Even test internal resistance. This charger does it all with ease. Highest battery capacity limit of 20,000 mAh. Charge, Discharge, Refresh, Test any NiMH or NiCd battery.