820 continuously and accurately reads the condition of the battery during the fast charge cycle without having to pause periodically to detect delta peak…so it fully and quickly charges the battery and avoids over charging. Super Brain’s improved heat management allows it to be used immediately after each charge. Fast charging commences as soon as the battery is connected followed automatically by trickle charge mode.

• For 6-7 cell sub-C or larger, NiCd and NiMH packs, 1,500 mAH and higher
  
• Charger and battery remain cooler while charging, extending battery life and delivering longer vehicle run time
  
• Operation is simple and completely automatic
  
• A safety timer shuts the charger off if left unattended for more than 120 minutes
  

Resources to Download:
1.)   Press Release for RB820 & RB960
2.)   MRC Super Brain Charger Comparison Chart