As viewed from the back side of the phone:
Battery measures 57.2(w) x 51.5 x 10.5 mm.
Contacts are located centered left/right and at the bottom of the top narrow side of the battery. There are three of them and they occupy an area approx. 4 mm high and 6 mm wide. Polarity is - to the left, + to the right.
(Sorry for taking almost a month to reply.)