2 to 5 business days
The Batteries Are Very Well Made And We Have Been Selling Them Now For Almost Many Years Without 1 Failure. Leaving A Flat Battery In A Remote May Cause It To Leak And This Can Cause A Lot Of Damage Inside The Remote, Possibly Intermittently For A Period Of Time, Once The Voltage Drops Below 3 Volts. However You Will Notice That You Need To Be Nearer To The Receiver For TheDevice To Respond. This Is A Good Indicator That The Battery Needs To be replaced. Never Be Recharged And Attempting To Recharge Them May Cause Harm.