Battery recommendations

Hello everyone, brand new here. the flashlight pictured is an Olight baton 3 (pro) max. I recently lost it in the snow here in Wisconsin. after about a month of some crazy low temperatures(-20f) I was able to uncover it after some warm times. I placed it on the charger after everything had warmed up and IT STILL WORKS! but with that being said, I have an actual battery charger from my vaping/building coil days. so im looking to find out what type of 18650 battery you would recommend for this light. im open to buying multiple to I dont have to worry about down time. I love this little light as it's super hands to take the dog out at night. any recommendations would be appreciated. thank you!