The ornamental design for a battery operated oilpump, as shown and described.
FIG. 1 illustrates a front perspective view of a battery operated oil pump;
FIG. 2 illustrates a front perspective view thereof with a powerhead disconnected from a pump stem;
FIG. 3 illustrates a back perspective view thereof;
FIG. 4 illustrates a front elevational view thereof;
FIG. 5 illustrates a rear elevational view thereof;
FIG. 6 illustrates a left side elevational view thereof;
FIG. 7 illustrates a right side elevational view thereof;
FIG. 8 illustrates a top plan view thereof; and,
FIG. 9 illustrates a bottom plan view thereof.
The dashed broken lines depict portions of the battery operated oil pump that form no part of the claim. The “M” symbol is a registered trademark of Macnaught Pty Ltd (Registration No. 5963795).