KX-TGA660 batteries die after a few min of use off either charger. Changed batteries ( AAA Rechargeable) two different times. it only last a min now. I purchased at Best Buy ~2 Years ago & have their Extended Warr as well. Not sure if there is a ez fix or if it goes to Pan or BB. Note: when in speaker Phone mode lots of static from it. the one handset is the only thing having any issue.