---
product_id: 724436696
title: "Britax One4Life Convertible Car Seat, 10 Years of Use from 5 to 120 Pounds, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, Machine-Washable Fabric, Iris Onyx"
brand: "britax"
price: "€ 195.08"
currency: EUR
in_stock: false
url: https://www.desertcart.pt/products/724436696-britax-one4life-convertible-car-seat-10-years-of-use-from
store_origin: PT
region: Portugal
---

# 10 years of secure use 4-in-1 versatile configurations ClickTight® easy installation Britax One4Life Convertible Car Seat, 10 Years of Use from 5 to 120 Pounds, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, Machine-Washable Fabric, Iris Onyx

**Brand:** britax
**Price:** € 195.08
**Availability:** ❌ Out of Stock

## Summary

> 🚗 Elevate every ride with the only car seat your child will ever need!

## Quick Answers

- **What is this?** Britax One4Life Convertible Car Seat, 10 Years of Use from 5 to 120 Pounds, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, Machine-Washable Fabric, Iris Onyx by britax
- **How much does it cost?** € 195.08 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/724436696-britax-one4life-convertible-car-seat-10-years-of-use-from)

## Best For

- britax enthusiasts

## Why This Product

- Trusted britax brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Adjustments:** 15-position headrest and harness move together—no rethreading needed
- • **4 Modes, Infinite Comfort:** Rear-facing infant to forward booster, adapts as they grow
- • **Built Tough with Steel Frame:** SafeCell™ crumple zone and V-shaped tether for ultimate crash protection
- • **One Seat, A Decade of Safety:** From newborn to booster, 5-120 lbs covered effortlessly
- • **Install Like a Pro in Seconds:** ClickTight® tech ensures a perfect, foolproof fit every time

## Overview

The Britax One4Life Convertible Car Seat offers unmatched longevity and safety, supporting children from 5 to 120 pounds with four adaptable configurations. Featuring a robust steel frame, patented safety tech, and ClickTight® installation, it combines ease, comfort, and protection for a decade of worry-free travel.

## Description



## Features

- 10 YEARS OF USE: The Britax One4Life convertible car seat delivers comfort and security from 5 to 120 pounds and up to 63 inches tall
- ONE CAR SEAT FOR LIFE: This car seat features 4 configurations, including rear facing infant car seat, rear facing toddler car seat, forward facing 5 point harness car seat, and forward facing high back booster seat
- INSTALL WITH CONFIDENCE: ClickTight(R) technology makes installation easy – simply open the seat, thread and buckle the seatbelt, and click the seat closed
- SAFETY YOU CAN TRUST: Equipped with a steel frame, SafeCell(TM) crumple zone, and patented V-shaped tether
- A SECURE FIT IN SECONDS: The 15-position headrest and harness move together using one hand, so you can quickly find the proper fit as your baby grows (no rethreading)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Model Number | E1C903Y |
| Product Dimensions | 52.07 x 49.53 x 63.5 cm; 13.61 kg |
| Item model number | E1C903Y |
| Minimum Weight Recommendation | 5 Pounds |
| Maximum Weight Recommendation | 54.43 kg |
| Material Type | Alloy Steel |
| Material composition | steel |
| Batteries required | No |
| Orientation | Forward Facing |
| Rear-facing maximum child weight | 120 Pounds |
| Harness type | 5-Point |
| Item Weight | 13.6 kg |

## Product Details

- **Brand:** Britax
- **Installation type:** Seat Belt
- **Material:** Alloy Steel
- **Colour:** Iris Onyx
- **Orientation:** Forward Facing
- **Item weight:** 30 Pounds
- **Maximum weight recommendation:** 54.43 kg
- **Harness type:** 5-Point
- **Minimum weight recommendation:** 5 Pounds
- **Age range (description):** Newborn to Youth

## Images

![Britax One4Life Convertible Car Seat, 10 Years of Use from 5 to 120 Pounds, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, Machine-Washable Fabric, Iris Onyx - Image 1](https://m.media-amazon.com/images/I/81QBYrVIx4L.jpg)
![Britax One4Life Convertible Car Seat, 10 Years of Use from 5 to 120 Pounds, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, Machine-Washable Fabric, Iris Onyx - Image 2](https://m.media-amazon.com/images/I/81ZVjs5T1GL.jpg)
![Britax One4Life Convertible Car Seat, 10 Years of Use from 5 to 120 Pounds, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, Machine-Washable Fabric, Iris Onyx - Image 3](https://m.media-amazon.com/images/I/81BHAqOLG-L.jpg)
![Britax One4Life Convertible Car Seat, 10 Years of Use from 5 to 120 Pounds, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, Machine-Washable Fabric, Iris Onyx - Image 4](https://m.media-amazon.com/images/I/81Or5PDN06L.jpg)
![Britax One4Life Convertible Car Seat, 10 Years of Use from 5 to 120 Pounds, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, Machine-Washable Fabric, Iris Onyx - Image 5](https://m.media-amazon.com/images/I/81GOwq00d6L.jpg)

## Frequently Bought Together

- Britax One4Life Convertible Car Seat, 10 Years of Use from 5 to 120 Pounds, Converts from Rear-Facing Infant Car Seat to Forward-Facing Booster Seat, Machine-Washable Fabric, Iris Onyx
- Britax Anti-Rebound Bar Accessory - Compatible with Britax One4Life Car Seats , Black
- Britax Car Seat Waterproof Liner - Moisture Wicking Fabric + No Slip Grip + Machine Washable + Crash Tested

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**Shop now:** [https://www.desertcart.pt/products/724436696-britax-one4life-convertible-car-seat-10-years-of-use-from](https://www.desertcart.pt/products/724436696-britax-one4life-convertible-car-seat-10-years-of-use-from)

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-03-17*