Some like these, I have been meaning to try one.?Battery not included.http://www.ebay.com/itm/UltraFire-1000Lm-Cree-XM-L-T6-LED-5-Mode-Flashlight-Torch-18650-Charger-501B-/290643835573?_trksid=p2047675.m1850&_trkparms=aid%3D222002%26algo%3DSIC.FIT%26ao%3D1%26asc%3D11%26meid%3D7592779161958802492%26pid%3D100011%26prg%3D1005%26rk%3D4%26sd%3D300874487236%26