Warranty-end battery puffs up, performance goes to zero

Was really happy with the part even if the operation is not comfortable. Unfortunately went after nearly two years of use (Warranty 2 years) of the battery to its knees and has mittleweile extent bloated that the ebook apart blurted. Battery has a thickness of 13mm mitlerweile. Original is approximately 3.5mm. Search spare battery so far unsuccessfully. To change only two solder joints to Ent.- or soldering. Plus = red / minus = black. For each of a soldering iron has done.