I have a modified Nerf Demolisher which works well with standard AAs or 2-3 Ultra Fire 14500 3.6V 900mAh batteries used with spacers.
I am concerned about the safety of the Ultra Fire 14500 3.6V 900mAh batteries since they seem to lack a protection PCB.
Is there a suitable replacement that will give me the same shooting distance as 3 Ultra Fires + spacer but with a safer design? If so, a purchase link to a reliable store would be appreciated.