Hi Jeff,

"Do you know if the older Toshiba Li Ion packs used Sony Li Ion
Cells? The web page lists Satellite: A70/A75, P30/P5, M30X/M35X, M50/
M55 Tecra: A3, A5, S2 as the models affected. *Is your laptop one of
those? (Hint: It helps to supply details of what you have to work
with)."

My model is a Tecra 510CDT.

Also have you found any docs mentioning the Li cell mfr(s) for the
PA2490U battery packs?

Ken