NOVELTY - Battery cell (A1) (100) comprises: a first electrode; a second electrode positioned relative to the first electrode in a manner generating electrochemical activity between the first and the second electrode; an active region (112) responsive to the electrochemical activity, where the active region comprises a localized measurement region (118) exhibiting a cell property; and a sensing platform (134) proximate the localized measurement region, where the sensing platform comprises a sensing element (138) for collecting data corresponding to the cell property in the localized measurement region.    USE - The battery cell is useful in a battery pack (claimed).    ADVANTAGE - The battery cell: has improved operational characteristics; improves the accuracy and the response of the sensing elements as these factors relate to the observed in-situ characteristics and parameters; and is compatible with sensing, monitoring and data gathering devices to provide and enrich the understanding of the operating parameters of the battery cell, the battery pack, and the overall drive system.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a battery cell (A2) exhibiting a cell property, comprising: the first electrode; the second electrode; a cell wall in surrounding relation to the first electrode and the second electrode, where the cell wall comprises an outer surface, and an inner surface forming a cell volume; the active region; and the sensing platform proximate the localized measurement region, where the sensing platform comprises a sensing element substantially enclosed inside the cell volume and for collecting data corresponding to the cell property in the localized measurement region; and    (2) a battery cell (A3) for use in a battery pack, comprising: the first electrode; the second electrode; the cell wall in surrounding relation to the first electrode and the second electrode; the active region; and a sensing platform proximate the localized measurement region, where the sensing platform comprises a sensing element disposed on the outer surface of the cell wall and for collecting data corresponding to the cell property in the localized measurement region.    DESCRIPTION OF DRAWING(S) - The figure shows a top, perspective, exploded assembly view of a battery cell.    Battery cell (100)    Active region (112)    Localized measurement region (118)    Sensing platform (134)    Sensing elements (138)