BuHybrid L6 review: This corded pool cleaner has a battery, too

            <h3 class="review-best-price" id="best-prices-today-buhybrid-l6">
        Best Prices Today: BuHybrid L6      </h3>
            <div class="wp-block-price-comparison price-comparison ">

    <div id="New" class="new_products_tab tabcontent">
        <div class="price-comparison__record price-comparison__record--header">
            <div>
                <span>Retailer</span>
            </div>
            <div class="price-comparison__price">
                <span>Price</span>
            </div>
        </div>
                                <div class="price-comparison__record check_on_amazon">
                        <div class="price-comparison__image">
                                                        <img decoding="async" src="https://www.pcworld.com/wp-content/themes/idg-base-theme/dist/static/img/amazon-logo.svg" alt="amazon" loading="lazy" />
                                                        </div>
                        <div class="price-comparison__price"></div>
                        <div>
                            <a class="price-comparison__view-button" href="https://www.amazon.de/s?k=BuHybrid+L6">Check</a>                         </div>
                    </div>

                            <div class="price-comparison__record price-comparison__record--footer">
                <span class="price-comparison__footer-text">
                                                Price comparison from over 24,000 stores worldwide                                              </span>
                                </div>
                    </div>
    <div id="Refurbished" class="refurbished_products_tab tabcontent">
        <div class="refurbished-padding price-comparison__record price-comparison__record--header">
            <div>
                <span>Product</span>
            </div>
            <div class="price-comparison__price">
                <span>Price</span>
            </div>
        </div>
                        <div class="price-comparison__record price-comparison__record--footer">
                <span class="price-comparison__footer-text">
                Price comparison from Backmarket                        </span>
                                </div>
    </div>
    </div>
            <div class="review-software-price">
        <div class="software-product-chart-main">
            <div class="software-product-chart-pricing">
                <div class="product-chart-item__pricing-details">
                    <div class="software-product-chart-pricing">
                        <span class="product-chart-item__pricing-details--links-wrapper">
                            <span class="not-amp">
                            <div class="software-product-chart-buttons "><div class="item-pricing-details"></div></div>                             </span>
                        </span>
                    </div>
                </div>
            </div>
        </div>
    </div>

Here’s a curious concept from the new-to-us robotic pool cleaner manufacturer Bublue: The BuHybrid L6 is a robotic pool cleaner that can run via a plug-in electrical connection or via an internal battery, a hybrid design that makes more sense than it might seem at first, at least on paper.

On the surface, the design has a lot in common with the Polaris VRX iQ+ and other power-corded robots. A small power box connects to standard wall power via a short cord. A separate, waterproof 49-foot-long cable then connects from the box to the 22-pound robot, attaching to its top via a large four-prong adapter with a screw-on sealing system that waterproofs the connection.

Specifications

The robot itself has a somewhat traditional design, though its black and gray color scheme and monster-sized wheels are a bit unusual.

Configured with the cable connected, the unit is ready for wired operation. Operation can be initiated by pressing the buttons on the robot itself, which, in addition to a power button, include four modes: floor, walls, waterline, and auto mode (which cleans all those surfaces).

Christopher Null/Foundry

The buttons are dimly backlit and hard to make out under any amount of ambient light; but ultimately, you power up the robot, select your mode, and drop it into the pool to get the unit running. A wide light band across the front of the robot changes color to indicate various information about its operating status.

You’ll get a lot more configurability by connecting the unit to the Bublue mobile app, which is configured by first onboarding the robot to Wi-Fi (2.4GHz only). This involves pressing a Wi-Fi button on the power box while the robot is plugged in, after which the robot is automatically connected and bridged to your home network.

Christopher Null/Foundry

Once connected to Wi-Fi, you have access to a total of seven operating modes (including a wall+floor mode and unexplained “eco” and “power” modes. Operating duration can be set for 2, 3, or 4 hours, and “path width” can be adjusted between “normal” and “fine.” (I presume this has to do with how close together the robot’s successive trips across the pool floor are, but this isn’t explained anywhere.)

Christopher Null/Foundry

If you want to end a cleaning session early, there’s also a function to send the robot back to the waterline for easy retrieval. (Otherwise, you’ll need to use the included hook.) A scheduling system is also available if you want to leave the robot in the pool and have it run periodically.

In addition to the Wi-Fi button, the only other button on the power box (aside from the power button) is a Bluetooth button. You’ll need to use this for one thing only: to activate the robot’s remote-control feature, because for some reason this feature doesn’t work over Wi-Fi.

Christopher Null/Foundry

The remote features a simple control wheel, and while the unit isn’t super responsive to commands, with enough patience I was able to guide it around the pool floor and pick up any stray bits of debris, although going up walls was very difficult to do with accuracy.

Again, each of these features is available only when the unit is plugged in to the power box. Alternately, you can pull the plug and go cordless. A 5200 mAh battery lets the BuHybrid operate for two hours while disconnected from its tether, providing a maximum specified coverage of 1,615 square feet. Since the app does not work while the unit is disconnected, note that you’ll need to use the hardware controls to choose your operating mode and you won’t be able to make changes on the fly.

Performance

I tested the unit various times both corded and uncorded, on natural debris and synthetic leaves.

On battery power, the BuHybrid didn’t impress, as it repeatedly left behind a large amount of test leaves, capturing only about 70 percent of the total debris. It also had a tendency to get stuck on the stairs, and despite Bublue’s claims of “multi-surface mastery” I needed to manually push it back into the water on several occasions.

Christopher Null/Foundry

On multiple occasions during these runs, the hatch covering the filter basket popped open, requiring me to retrieve it with a pole and close it before restarting the run. I’ve also caught the robot spinning around in circles on the surface of the pool for no clear reason, perhaps temporarily unable to re-descend.

I had considerably better luck when running the robot with its cable connected, in large part because using the maximum 4-hour running time setting allows it to cover twice as much ground per run. In this mode, the robot was able to collect 99 percent of debris—including debris on the stairs—although it did get stuck there again once. Apart from that, it left behind just one leaf in a corner of the pool.

Retrieval is also much simpler when corded, requiring just a single tap in the app to bring it back to the surface. Note also that the battery will charge whenever the cable is connected, including while the unit is actively running.