Primary Arms AutoLive® Battery Cap

Manufactured by Primary Arms
MPN: 210110
Manufactured by Primary Arms
45 Reviews

In Stock

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Bring the power of AutoLive® to your favorite optics! The AutoLive Battery Cap is compatible with many of the industry’s most popular optics and brands, allowing you to improve their performance with motion-sensing illumination control. If your current optic has short battery life, or if you want ‘always-on’ storage for home defense, the AutoLive Battery Cap is the perfect upgrade for you.


*Third party compatibility subject to change.

  • Primary Arms SLx 1-8×24 FFP
  • Primary Arms SLx 1-10×28 SFP
  • Primary Arms SLx 1-6×24 SFP Gen III and IV
  • Primary Arms SLx 1-6×24 FFP
  • Sig Optics Tango6® MSR 1-6x24mm
  • Vortex Strike Eagle® 1-6 SFP
  • Vortex Strike Eagle® 1-8 SFP


  • Integrated AutoLive motion sensing technology
  • Instantly turns on optic illumination when you pick up your firearm
  • Low profile design
  • Extends battery life
See More


BrandPrimary Arms
  • Battery Cap Compatibility
  • Product Overview: AutoLive Battery Cap
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

45 reviews


Quality piece of gear, does not fit the PST 1-6


Just does not fit the Vortex PST 1-6

Seriously a life saver

by -

I got really tired of having to keep my LPVO illumination on all the time because when you need your rig, you do not have the time to turn it on. Those seconds can literally be life or death. Even worse, finding out the last battery you put on two days ago wasn't up to par and realizing your reticle is not on when needed. I do have a nice weapon light, but even then, you need lighter colors on the target to see the reticle. That is leaving waaay to much to fate. This, absolutely brilliant solution to the need for an instant on need that can be retrofitted on to your "old" reliable LPVO is fantastic. I highly recommend this product.

2 Mins


Worked fine on the SLX Nova. Never saw it mentioned in any literature, for those wondering the reticle shuts off at about 2 mins of inactivity.



Does exactly as advertised, and the install was a breeze. Set my rifle with the Gen 4 Nova 1-6 on a table, illumination was on, left it for 5 minutes and came back it was off and then with a poke it came back to life again. Just find your favorite brightness setting (i've found 8 works best for both darker rooms and full day light bright) set ir and forget. This and the Nova are a hell of a combo to beat for $400.

Works great


Whether you call it Autolive, MOTAC or Shake Awake I love having an illuminated optic that I don't have to turn on and off. I bought one of these for my Windham Weaponry CDI with a Vortex Strike Eagle 1-6 and it works perfectly. After 2 minutes of not sensing movement it goes to sleep and wakes up the moment the firearm is moved.

Great item

by -

Received mine today. Love it, works perfect. Also works on a Primary Arms PAC 2.5 prism optic & a Monstrum 3x prism OPTIC.

AutoLive Battery Cap


Gotta love a simple add-on that adds functionality. Hopefully it lasts. Works on my Strike Eagle 1-6 just fine.

Excellent addition!

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Added this to my Primary Arms SLx 1-6×24 FFP on my .300 Blackout rifle. Works Perfectly! Highly Recommend!

Timed perfection


I bought this to try on my Primary Arms SLx 3x32mm Gen III Prism Scope - ACSS CQB-M2 Reticle - 5.56 but it does not fit this or my other 3 PA prism scopes. I tried it on my Sun Optics Mantis 30MM 1-6X24mm and it worked perfectly. Hopefully, PA will make one that fits onto their prism combat optics in the future. Great product.

Even worked on my TrueGlo LPVO


I purchased this for a Strike Eagle, and it’s worked as advertised on every optic that I’ve tried it on that uses a 2032 battery with a cap that threads inside the optic…red dots included…..I think it’s a great addition to your optic!!