3.7 V 7200Mah Rechargeable Battery Pack

Eartec Rechargeable 3.7V Lithium-Ion Battery for UltraLITE & HUB Systems

Great light and you can use the rechargeable battery pack.

This was exactly what I was looking for. The battery pack is rechargeable and fits in the flashlight. very easy to use.

Very nice headlamp, and it comes with a rechargeable battery pack.

Have 2 of these out, I purchased the rechargeable battery pack and made a big difference

Great light does what I want is bright for size of you use 3.7v rechargeable it is pretty bright,. Only complaints is it is not as bright as the hp1 that this flashlight replaced on there market and the red ring on the tail cap so I use a old hp1 cap also doesn't have the anti roll thing so it will roll off a uneven surface

I have a Streamlight Polytac flashlight that only accepts 3v cr123 batteries. all other rechargeable cr123 batteries are 3.7v which is too much voltage, but these Watson batteries work great. I love how these Watson batteries came completely sealed. B&H photo seems like the only place that carries them. I hope they don't ever stop!

I have had this light for a few weeks at this point and so far I love it. I got the rechargeable battery pack with it and the battery pack lightens the light up significantly. Battery lasts a long time and the light is BRIGHT! Haven’t had to use it in the weather yet but so far I am super happy with this light.

I purchased the MB-D18 Multi-Power Battery Pack after I purchased my D500. Initially I found that I was consuming rechargeable battery packs on the camera at a rapid rate when out shooting, particularly when downloading images via SnapBridge as I was shooting. The MB-D18 Battery pack gave me the flexibility of utilizing different rechargeable batteries that fit the type of photography I was involved with on different days. Utilizing the larger En-El 18c rechargeable battery packs allowed me to go longer without changing batteries at times when battery changes were not feasible. I would highly recommend the MB-D18 battery pack for any photography enthusiast who wants to be able to have greater flexibility in choosing power sources and the ability to shoot significantly longer without changing batteries!

I use this battery as a back-up to my Nikon battery EN-EL4a rechargeable Lithium-ion Battery Pack. I always use my original Nikon battery but if I am out in the field and my Nikon battery goes down after many shots, I then switch to the the Watson EN-EL4A Lithium-Ion Battery Pack as my back-up until I can re-charge the Nikon battery again at home. I find it's more economical using it that way since there is such a big price difference between the Nikon Battery and the Watson Battery. However the Watson battery is a very good battery and reliable in every way.