DuraTrax Sport Peak Charger, charges 4-7 cell NiCd or NiMH (4.8 - 8.4V) cells with a capacity range of 750 - 7500mAh Compatible with AAA size cells up to the highest capacity sub-C cells as well as 4-5 cell nitro receiver packs AC and DC input capabilities make it perfect for indoor or outdoor use Pushbutton control and five LED indicators (4 Red, 1 Green), audible tones and built-in leads for simplicity and convenience Precise peak detection algorithm with automatic TRICKLE charge fills packs completely for optimum voltage and run time Built-in jack included for charging 4 or 5 cell NiCd or NiMH receiver batteries for nitro models, or for monitoring charge voltage of battery connected to the main output with a separate digital voltmeter Audible tones and multiple LEDs for simple setup and use Lightweight switching AC power supply delivers up to 5 amps of charge current Solid state reverse polarity and current overload safety devices ensure trouble-free operation and long duration Five year warranty