"As a Toshiba Corp. marketing executive said to me, "Toshiba does not guarantee the system's performance, reliability or safety as they relate to aftermarket batteries.""
"This is ironic, since notebook makers like Apple, Dell, Sony, Lenovo, Toshiba and others have an uneven record when it comes to the batteries they sell themselves. Together, they have recalled millions of bad batteries over the past few years. Some of the power packs weren't up to spec, while others were potential fire hazards. So it seems that no battery, regardless of who makes or sells it, is immune to problems."
