I beg to differ, chemical energy is not required. See the Oxford English Dictionary...
Etymology: French batterie (13th cent.) ‘beating, battering, a group of cannon’, etc. (= Provençal bataria , Spanish batería , Italian battería ), battre to beat: see -ery suffix.
1. The action of beating or battering. ...
3. The beating of drums; sometimes a particular kind of drum-beat, perhaps that giving the signal for an assault.
4. A number of pieces of artillery placed in juxtaposition for combined action; in Military use, the smallest division of artillery for tactical purposes ...
III. A combination of simple instruments, usually to produce a compound instrument of increased power; applied originally with a reference to the discharge of electricity from such a combination.
III. 9. Electr. An apparatus consisting of a number of Leyden jars so connected that they may be charged and discharged simultaneously.
III. 10. Galvanism. An apparatus consisting of a series of cells, each containing the essentials for producing voltaic electricity, connected together. Also used of any such apparatus for producing voltaic electricity, whether of one cell or more.
III. 11. Optics. A combined series of lenses or prisms.
III. 13. a. Used gen. for a collection of similar pieces of apparatus grouped together as a set