# Which bike lights offer the longest battery life? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

Which bike lights offer the longest battery life?

## Products

### Magicshine VIVEE 50 HALO Smart Brake-Sensing Taillight
```yaml
product: magicshine-vivee-50-halo-smart-brake-sensing-taillight
brand: Magicshine
price_gbp: 29.54
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
lumens: 50 lumens
weight: 31g
runtime: 25 hours
mount_type: Magnetic quick-release mount
rechargeable: true
waterproof_rating: IPX6
```

- **Price:** £29.54 [^1]
- **Summary:** The VIVEE 50 HALO is a compact smart taillight with 360-degree visibility, brake sensing, motion-activated auto-sleep, and FTR LightSync support. Its USB-C charging, replaceable battery, and lightweight magnetic mount suit commuters, urban riders, and everyday cyclists.
- **Ideal For:** With a maximum 25-hour runtime in Eco Flash mode and a replaceable battery module, this taillight suits riders seeking the longest battery life for extended rides.

---
## References & Sources
[^1]: Magicshine, accessed 2026-09-13. https://magicshine.com/products/vivee-50-halo-smart-taillight