Review on 🔋 STREAMLIGHT Battery Stick SL-20XP/Ultrastinger NiMH: Long-lasting Power for Reliable Performance by Juan Moncrief

One of the battery sticks was damaged on arrival. One cell had a dent and only time will tell if the dent will affect battery life. The battery was damaged either at the factory or during packing as the shipping box showed no signs of damage. Battery sticks aren't ideal for my standard Ultra Stingers, although Streamlight claims this battery works for both Ultra Stinger and Ultra Stinger LED. These battery sticks are slightly longer than the standard sticks and do not allow the end cap to close tight enough to be sealed with an o-ring. See the crumpled cell in the picture and the end caps from two of my flashlights. The taped end cap has the old standard battery and is completely sealed, while the non-taped end cap has a new NiMH battery and will not screw and seal properly. My flashlights aren't as tight as they used to be, so I'm giving this product an average rating.