Vortex Defender-ST: Solar-Powered Enclosed Red Dot with 150,000 Hour Battery Life
Features
- Fully enclosed 7075 aluminum housing protects emitter from debris and impact
- Solar panel with Auto D-TEC technology automatically switches between solar and battery power
- 150,000 hour battery life with solar assist (35,000 hours battery only)
- Multi-reticle system – 3 MOA dot, 32 MOA circle, or combined dot and circle
- 12 brightness settings (10 daylight, 2 night vision)
- Motion-activated with 10-minute auto-shutoff
- Side-loading CR2032 battery for easy replacement
- Large viewing window for fast target acquisition
- DeltaPoint Pro footprint for direct mounting
- Waterproof, fogproof, and shockproof construction
The Vortex Defender-ST solves the battery anxiety problem of traditional red dots by combining solar charging with a massive 150,000-hour battery life through Auto D-TEC technology that automatically draws from whichever power source is optimal. This optic works well for duty use where failure isn’t an option, competition shooters running multiple platforms, and anyone who wants enclosed emitter protection without constant battery changes. The fully enclosed 7075 aluminum housing protects the emitter from rain, dust, and carbon buildup that kills open emitter dots, while three reticle options and 12 brightness settings adapt instantly to any lighting condition from dark rooms to bright desert sun.
Specifications
- Brand: Vortex Optics
- Model: Defender-ST Enclosed Solar Micro Red Dot
- MPN: DFST-MRD3-E
- Reticle Options: 3 MOA Dot, 32 MOA Circle, or 3 MOA Dot with 32 MOA Circle
- Magnification: 1x
- Brightness Settings: 12 (10 Daylight, 2 Night Vision)
- Battery: CR2032
- Battery Life: 35,000 hours (battery only), 150,000 hours (with solar assist)
- Power System: Solar with Auto D-TEC Technology
- Housing Material: 7075 Aluminum
- Footprint: DeltaPoint Pro
- Mounting: Top-Load Battery, Side-Access
- Length: 1.8″
- Width: 1.3″
- Height: 1.2″
- Weight: 1.6 oz (with battery)
- Waterproof: Yes
- Fogproof: Yes
- Shockproof: Yes
What’s Included
- 1x Defender-ST red dot sight
- 1x Picatinny mount
- 1x CR2032 battery
- 1x Rubber cover
- 1x Lens cloth
- 1x Custom tool
- 1x Extended Torx T-10 bit
- Mounting screws












