When I started researching niches for a new affiliate site, I kept seeing the same pattern: everyone was writing "Best Portable Power Station 2025" lists. Those pages are saturated with thin content from big sites. I wanted something with higher purchase intent and less competition.
I found it by asking a specific question: what happens when someone on a CPAP machine loses power? For millions of sleep apnea patients, a CPAP isn't optional — it's prescribed therapy. A power outage means disrupted sleep, health risks, and an urgent need for a backup battery.
That intersection — medical necessity + power equipment — is underserved. People searching "CPAP battery for ResMed AirSense 10" or "how long will a Jackery 500 run my CPAP" have a clear buying intent. They're not browsing; they're solving a problem.
I built PowerForCPAP as a single-niche site with 30+ deep buying guides. Each page answers one specific question: runtime tables for specific CPAP models × specific power stations, FAA battery rules for travel, generator sizing calculators. No fluff. No generic lists.
The early traffic signals are promising. Organic sessions are growing month over month from long-tail queries. AdSense RPM in the health-adjacent space is higher than generic content, and affiliate commissions from power station brands (Jackery, EcoFlow, Bluetti) run 5–8% — better than Amazon's electronics rate.
If you're building a niche site, look for the intersection of a real need and a purchase decision. That's where the value is.