# Portable battery\-powered baby sleep devices for travel Which portable baby sleep device runs on battery and suits travel? ergoPouch Drift Away Portable White Noise Machine: The store's listing says the rechargeable battery gives 48 hours of playback on a single charge, while the maker's JP page says up to about 45 hours, so the sources disagree\. Testers repeatedly said the small, light and compact size makes it easy to pack in a bag or pram caddy and take anywhere, and they used it in the car, at home and on weekends away\. The unit is 8 cm in diameter, excluding the strap\. ergoPouch Drift Away White Noise Machine: A shop buyer describes it as lightweight and portable, playing pink, white and brown noise plus nature sounds such as rain and waves, with over 48 hours of playtime on one charge\. Testers found it small, light and easy to pack in a bag or pram caddy, and used it in the car, at home and on weekends away\. It arrives with a charging lead only, so a separate USB charger plug is needed to charge it before first use; there are four buttons and a simple instruction leaflet\. ### 1. [ergoPouch Drift Away Portable White Noise Machine \(SKU EPWN\-TAUPE, MPN 9352240019825\)](/products/ucp/ergopouch-com/8261735219369) (sold by ergopouch\.com) The store's listing says the rechargeable battery gives 48 hours of playback on a single charge, while the maker's JP page says up to about 45 hours, so the sources disagree\. - Battery: The store's listing says the rechargeable battery gives 48 hours of playback on a single charge, while the maker's JP page says up to about 45 hours, so the sources disagree\. (listing) - Portability: Testers repeatedly said the small, light and compact size makes it easy to pack in a bag or pram caddy and take anywhere, and they used it in the car, at home and on weekends away\. (blog) - Size: The unit is 8 cm in diameter, excluding the strap\. (guide) ### 2. [ergoPouch Drift Away White Noise Machine](/products/ucp/ergopouch-com/8876805488809) (sold by ergopouch\.com) A shop buyer describes it as lightweight and portable, playing pink, white and brown noise plus nature sounds such as rain and waves, with over 48 hours of playtime on one charge\. - Battery: A shop buyer describes it as lightweight and portable, playing pink, white and brown noise plus nature sounds such as rain and waves, with over 48 hours of playtime on one charge\. (blog) - Portability: Testers found it small, light and easy to pack in a bag or pram caddy, and used it in the car, at home and on weekends away\. (blog) - Size: The unit weighs 96 g \(0\.2 lb\)\. (manual) ## Also cited in the text - ergoPouch Drift Away White Noise Machine, setup: It arrives with a charging lead only, so a separate USB charger plug is needed to charge it before first use; there are four buttons and a simple instruction leaflet\. (review) Every value in the table is a fact RoboTrunk checked, linked to the page it came from\. A dash means no checked fact fills that cell\. Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live\. Written 2026-10-12T02:42:01.376Z. This page is published by RoboTrunk, a store built for shopping agents. The store named on this page sells the product and ships it. RoboTrunk is not the seller and never holds the money. Buying works in one path. RoboTrunk's tools prepare a checkout at that store, then hand back a short-lived link. The person approves the total; once RoboTrunk has checked the store's total against it, the person is given the checkout link to tap in their own browser, or, if the person prefers and gives permission, their agent may open the link and finish there, and payment always happens on the store's own checkout page. RoboTrunk never takes the payment or sees a card. Where the rest of this site is: - /agent/story.md is what RoboTrunk is and how it works, in full. - /agent/tools.json is every tool, its arguments and its answers. - /agent/merchants is every store you can buy from through RoboTrunk. - /products/ucp is every store's indexed products. - /products/search is one search across every store, in plain words. - [What RoboTrunk is](/agent/story.md) - [Every tool, in your browser through WebMCP](/agent) - [The tools and how to call them](/agent/tools.json) - [The stores you can buy from](/agent/merchants) - [Every store's products](/products/ucp) - [Search every store at once](/products/search)