The image button does not provide an input with a value that the batch editing can find and it is also not an editable element. So, it cannot be used on its own as an editable container in a batch edit grid. It is also important to note that its default behavior is to postback the page on click and this will destroy the data in the grid.
With this in mind, what I suggest is that you consider what would be the most suitable editor option for your use case and if it does not have a simple structure (like a textbox, for example), employ the template approach from this article: https://docs.telerik.com/devtools/aspnet-ajax/controls/grid/data-editing/edit-mode/batch-editing/working-with-templates.
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