---
product_id: 553108887
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, Onyx"
brand: "britax"
price: "3173 kr"
currency: DKK
in_stock: false
reviews_count: 5
url: https://www.desertcart.dk/products/553108887-britax-one4life-convertible-car-seat-10-years-of-use-from
store_origin: DK
region: Denmark
---

# 10 years of secure use ClickTight easy install Steel frame + SafeCell tech 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, Onyx

**Brand:** britax
**Price:** 3173 kr
**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, Onyx by britax
- **How much does it cost?** 3173 kr with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/553108887-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

- • **Clean & Convenient:** Machine-washable, flame-retardant fabric keeps your car fresh and your child cozy.
- • **Custom Comfort & Fit:** 15-position headrest and no-rethread harness adjust simultaneously for a perfect fit in seconds.
- • **Effortless Installation:** ClickTight technology guarantees a secure, stress-free setup every time.
- • **Ultimate Impact Protection:** High-strength steel frame, SafeCell crumple zone, and patented V-shaped tether for peace of mind.
- • **One Seat, 10 Years of Safety:** From newborn to big kid, covers 5 to 120 lbs with 4 versatile modes.

## Overview

The Britax One4Life Convertible Car Seat is a premium all-in-one solution designed to grow with your child from 5 to 120 pounds and up to 63 inches tall. Featuring four configurations—from rear-facing infant to forward-facing booster—this seat combines advanced safety technologies like a steel frame, SafeCell crumple zone, and patented tether with user-friendly features such as ClickTight installation, 15-position adjustable headrest, and machine-washable flame-retardant fabric. Trusted by parents for comfort and security, it’s the ultimate long-term investment in your child’s safety and your peace of mind.

## Description

Enjoy safe travels from birth to big kid with the Britax One4Life all-in-one car seat. 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. Start with the rear facing car seat for infants and toddlers, then graduate to the forward facing car seat and booster car seat for preschoolers and big kids. ClickTight technology makes it easy to install your new baby car seat with confidence. Simply open the seat, follow the path to thread the seat belt, buckle it, and click the seat closed. The One4Life all in one car seat is outfitted with a high-strength steel frame, a SafeCell crumple zone, and a patented V-shaped tether. The protective seat shell and foam-lined headrest help absorb impact energy and are designed to help keep your child's head, neck, and body safe. Adjust the 15-position headrest and no-rethread harness at the same time, so you can find a secure fit in seconds. Quickly adjust between 9 recline positions and use the easy-read level indicators to find the correct angle. The Britax One4Life comes with an easy-to-remove, machine-washable cover, and the knit construction is naturally flame-retardant.

Review: I love this car seat! It’s super soft and comfortable, literally seems like my kid is sitting on a cloud. It’s definitely on the heavier side so you want it to permanently live where you install it if possible (but that’s to be expected from a car seat this size). My only qualm is that the straps get twisted just about every time I go to put my kid in it, which is more inconvenient than anything. All in all, I have zero questions or worries when it comes to my child being safe in this seat.
Review: Absolutely amazing investment! After our car wreck, we had to find a new car seat, and let me tell you, my daughter absolutely loves it! Gone are the days of her refusing to sit and throwing tantrums within minutes of hitting the road. This car seat is a total game-changer! Installation was a breeze, and I seriously wish we had made the switch sooner. It's such a relief to have peaceful drives now! Worth every single penny!

## Features

- 10 YEARS OF USE: The Britax One4Life all-in-one 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0C74MQ38H |
| Batteries required | No |
| Best Sellers Rank | #39,177 in Baby Products ( See Top 100 in Baby Products ) #39 in Convertible Child Safety Car Seats |
| Care instructions | Machine Wash |
| Customer Reviews | 4.9 4.9 out of 5 stars (83) |
| Date First Available | 26 July 2023 |
| Forward-facing maximum child weight | 120 Pounds |
| Forward-facing minimum child weight | 22 Pounds |
| Harness type | 5-Point |
| Item Weight | 13.6 Kilograms |
| Item model number | E1C903S |
| Material Composition | steel |
| Material Type | Polypropylene |
| Maximum height recommendation | 63 Inches |
| Maximum weight recommendation | 120 Pounds |
| Minimum weight recommendation | 2.27 kg |
| Model number | E1C903S |
| Number of items | 1 |
| Number of reclining positions | 15 |
| Orientation | Forward Facing |
| Product Dimensions | 52.07 x 49.53 x 63.5 cm; 13.61 kg |
| Rear-facing maximum child weight | 50 Pounds |
| Rear-facing minimum child weight | 5 Pounds |
| Style | One4Life |

## Product Details

- **Brand:** Britax
- **Colour:** Onyx
- **Installation type:** Seat Belt
- **Material:** Polypropylene
- **Orientation:** Forward Facing

## 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, Onyx - Image 1](https://m.media-amazon.com/images/I/71D+AFN-qFL.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, Onyx - Image 2](https://m.media-amazon.com/images/I/81E2K+c6ywL.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, Onyx - Image 3](https://m.media-amazon.com/images/I/81KYFe5zNRL.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, Onyx - Image 4](https://m.media-amazon.com/images/I/81UvnM0QITL.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, Onyx - Image 5](https://m.media-amazon.com/images/I/81WJJ7NUUAL.jpg)

## Questions & Answers

**Q: Is this for rear & foward facing?**
A: Rear facing until an older age.   I think six.  For my grandson. Than reverse.  The seat weighs a ton, that’s good.

## Customer Reviews

### ⭐⭐⭐⭐ Review
*by M***U on 13 November 2025*

I love this car seat! It’s super soft and comfortable, literally seems like my kid is sitting on a cloud. It’s definitely on the heavier side so you want it to permanently live where you install it if possible (but that’s to be expected from a car seat this size). My only qualm is that the straps get twisted just about every time I go to put my kid in it, which is more inconvenient than anything. All in all, I have zero questions or worries when it comes to my child being safe in this seat.

### ⭐⭐⭐⭐⭐ Review
*by B***Y on 22 July 2025*

Absolutely amazing investment! After our car wreck, we had to find a new car seat, and let me tell you, my daughter absolutely loves it! Gone are the days of her refusing to sit and throwing tantrums within minutes of hitting the road. This car seat is a total game-changer! Installation was a breeze, and I seriously wish we had made the switch sooner. It's such a relief to have peaceful drives now! Worth every single penny!

### ⭐⭐⭐⭐⭐ Review
*by M***H on 20 September 2025*

Hands down the easiest car seat to install. Totally reliable. Recommend to all parents. Washable, removable cup holders.

## 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, 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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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-03-03*