Battery 6 Volt, Free USPS shipping 48 states

This is a pre-tested 6V Lantern battery.  This is the same battery we ship FREE with every ADOR order.  The terminals are springs, and the technology is Carbon Zinc (not rechargeable).  It should last at least one year but we do not make warranty for two reasons:  Shipping and Handling is too expensive, and we cannot ascertain if someone mishandled or misapplied the battery.***  At first, we thought by rejecting batteries that do not measure extremely low internal resistance or low output voltage, that these batteries would be very likely to be close to perfect.  However, experience tells me a few batteries still do not last a whole year and I don't know why.  In the long run, if you have 120VAC receptacle available I recommend switching to electric power. Potential reasons for short battery life: Not really the battery:  Are you sure your symptoms observed are truly for weak battery and not for something like "Obstruction" or "Weak Motor"?  The pivotal question is this: are you repla