Garmin · Lights
Varia RearVue 820
5/5
The verdict
Average of 1 expert review →Reviewers liked
- High-resolution radar brings superlative levels of accuracy
- Its ability to track same speed vehicles in unmatched
- Light output and battery life improved vs the outgoing RTL515
- USB-C and a removable rechargeable battery
Watch out for
- Expensive, its enhanced featureset is questionable in parts, but its accuracy wins out
- Many of its high-end features are exclusive to modern Garmin head units
See how it ranks: Best bike lights →
Expert reviews
Expert review · 17 Apr 2026
Cycling Weekly
- +High-resolution radar brings superlative levels of accuracy
- +Its ability to track same speed vehicles in unmatched
- +Light output and battery life improved vs the outgoing RTL515
- +USB-C and a removable rechargeable battery
- −Expensive, its enhanced featureset is questionable in parts, but its accuracy wins out
- −Many of its high-end features are exclusive to modern Garmin head units
https://www.cyclingweekly.com/author/simon-fellows · Read the full review ↗