News, comparisons, guides, features and reviews: everything to choose and get the most from your batteries, power banks, power stations & solar panels.
Welcome to the Best Batteries blog. For more than ten years, mobile energy has been our job: power banks, portable power stations, solar panels, cells and chargers hold no secrets for our team. This blog is where we share that expertise, not to drown you in technical detail, but to help you make the right choices, with confidence. You will find five main families of articles: News to follow launches and market trends; Comparisons to settle the models, methodology in hand; Guides to answer your practical questions (runtime, safety, charging, maintenance); Insights to understand in depth the technologies and stakes of portable energy; and Reviews, where a single device fills the whole page: what its headline figures are really worth, what it does well and what it does badly. Enjoy the read, and feel free to explore our product pages to go from theory to purchase. · 148 articles
We have been publishing one detailed review per portable power station for months, product by product. This page brings all fifty together for the first time in a single ranking, scored with the same grid for every model. You will find the podium, one winner per use case, the detail of the top ten, and a sortable table of the fifty models with their sub-scores.
Published on July 20, 2026 by Julien
With 4 MPPT trackers and up to 2000 W of solar input, the EcoFlow Stream Ultra features the widest configuration in its range, but it receives a harsh grade in an electromagnetic compatibility test and keeps feeding surplus power back to the grid even with a full battery, a design choice the manufacturer stands behind.
Published on August 29, 2026 by Christophe
This brand-new balcony battery promises 96.1% efficiency, but the real figure comes in around 79%, one of the widest gaps in the category. Its smart mode sometimes charges from the grid during off-peak hours even when sunlight is available, a counterproductive behavior rather than simply a lack of finesse.
Published on August 29, 2026 by Christophe
This large AC-coupled battery delivers on its efficiency promise (83 to 85% measured, a good score for this type of coupling) and its backup switchover in under 10 milliseconds, but its "5-minute installation" only covers the storage part: unlocking the full 3500W requires an electrician and a dedicated outlet, for several hundred euros of extra work.
Published on August 29, 2026 by Christophe
This DC-coupled balcony battery delivers on its efficiency promise, with real-world conversion measured between 90 and 93 %, consistent with the manufacturer's own figures. But it carries the heaviest software-reliability baggage of any product in this category reviewed to date: failed updates, random BMS resets, and at least two complete hardware failures documented within weeks.
Published on August 29, 2026 by Christophe
A dedicated balcony battery costs anywhere from £600 to well over £1,500. If a power station has been sitting in a cupboard since your last camping trip, reusing it to store balcony solar is tempting. It's also entirely doable, on one condition: don't try to wire it into the home's electrical circuit the way a dedicated kit would. Here's what genuinely works, and why.
Published on August 28, 2026 by Julien
During a power cut, the router is rarely the appliance anyone worries about, and that is exactly the problem: it gets plugged into whatever station is at hand, on whatever socket is closest, and half the possible runtime is lost without anyone noticing. A router barely draws any power. What matters here isn't the size of the station, it's how you plug it in.
Published on August 28, 2026 by Pierre
A power station never gives back every watt-hour it advertises. What is far less widely known is that the missing figure is not fixed: the same unit can return 860 Wh or 937 Wh depending on the socket you pick, and 1,573 Wh or 1,725 Wh depending on the load you ask of it. We went back through the 46 measurements published in our reviews to show what that changes in practice, and why an efficiency percentage quoted on its own tells you almost nothing.
Published on August 28, 2026 by Julien
EcoFlow, Anker, Bluetti, Jackery, Ugreen or DJI Power: their companion apps control our batteries over Bluetooth, WiFi and sometimes the cloud. Here is what data they actually collect, what EU data protection law says, and the settings that let you take back control.
Published on August 28, 2026 by Hanne
On 27 August 2026 a new regulation brought plug-in solar into the law in England, Wales and Scotland. The same 800 W ceiling as Germany, but one clause changes everything: the text excludes devices designed to store energy. Just as the balcony battery becomes the star product of the German market, London has chosen the opposite path.
Published on August 28, 2026 by Julien
This DC-coupled balcony battery delivers on its full-power efficiency promise, about 89% measured, but drops sharply below 150W, the most common situation on a balcony. Its real documented weakness is not the power electronics but the WiFi and firmware, with a recurring charging-lockup bug, and the multi-module extension suffers from a charge imbalance between stacked units.
Published on August 27, 2026 by Christophe
This balcony micro-inverter delivers well on its main promise, a measured efficiency of 93 to 94% close to the stated 96.7% and genuinely independent MPPT trackers, but its documented weakness is not energy production: it is the reliability of the WiFi and monitoring app, which regularly loses connection without affecting the conversion itself.
Published on August 27, 2026 by Christophe
This two-in-one Samsung power bank delivers on its basic promises, a confirmed 25W on a single USB-C port and a weight matching the stated 222g, but wireless charging stays capped at 7.5W against competitors reaching 15W, and the three-device mode drops all outputs to 7.5W each.
Published on August 27, 2026 by Christophe
