COASTA(R) LIGHTING ZXAAA RECHARGEABLE BATTERY PACK Pack power with purpose. COAST ZITHION-XA(R) rechargeable lithium batteries change the game in responsible, portable power technology. Advanced engineering provides a comprehensive upgrade compared with other sources of battery power-delivering long-lasting run times for a clear performance advantage over standard rechargeable lithium and NiMH batteries. To mimic the broad compatibility of alkaline batteries, proprietary COAST ZX Optimized Voltage(TM) allows ZITHION-XA(R) batteries to modulate their power supply up or down based on the need and prevent flickering, overheating, and damage to products. Mfg: Coast Products