I like the idea of using lion vs lipo... being so new to this I maybe should have looked at those before I bought this. https://www.amazon.com/dp/B0C1B2K2M4?psc=1&ref=ppx_yo2ov_dt_b_product_details . These fit and so far last pleanty of time but since the controller sits unsued during the week maybe not the best choice?