Yes. Most any brand lithium ion battery should be fine when used in your Eagle Beam product. When selecting additional lithium batteries, we recommend not using any batteries with a lower mAh rating than that of your included Eagle Beam batterie(s). However, to some degree you can safely increase the run-time of your Eagle Beam Echo or Explorer by purchasing lithium batteries with higher mAh volumes should you choose to do so. We do not recommend any batteries higher than 6000 mAh however.