I need a replacement battery for my B50 notebook.

Batteries for the B50 (Compal CL-51/56) are available through various online retailers like the ones below.

http://www.battdepot.com/model/Compal/CL51.aspx

http://www.lithium-batteries.net/laptop/compal/cl51-battery.html

NOTE: Buyer Beware! As always, when making online or offline purchases, check into the return policies for restocking or shipping related fees.
We are not affiliated in any way with the retailer(s) above and cannot be held responsible in any way for purchase problems.