For severaldaysthe indicatorin the top barreportedthe "BatteryService" followedby a symbolin the shapeof a trianglewith an exclamation point.
Ifeel luckythe batterywasstill the original one, mine isa MacBookPro15 "(late2008)
Thebattery doorwasraisedfor about1mmm,with the handI couldfeel aslight rise,and alsoforcedthe lock leverin the closure.
The new battery,orderedfrom the Apple Store, it comescompletelywithout force,but most disappearedwiththe riseof1mmbattery!
Thismakes me think thatthe batteryyou were"blowing", I runrisks ifI wantto besomewhere in the housethe batteryunused?
On theApple siteyou are instructed tocontact aServices thatwaste disposalin your area, the problemis thatwhere I livein Versilia(Tuscany - Italy),there is noefficientsystem of disposalof this type ofwaste.
I amalso availableto bringthe batteryin personat an AppleRetailStore, butApple's web siteindicatedthis solutionis notsoand I assumewould not takeback mydead battery.