Cordless robotic pool cleaners, and what the battery actually costs you
The short answer. Cordless is now the default in this category and for most domestic pools it is the right choice, because the cable is the part owners genuinely resent. The trade is endurance: a cordless robot cleans until the battery is flat, so the only question that matters is whether one session finishes your pool. If it does not, a cable stops being an annoyance and becomes the fix.
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Our picks at a glance
First, make sure you are shopping for the right machine
Two very different products are sold with almost the same words, and the confusion is expensive.
- A cordless robotic pool cleaner drives itself. You drop it in, it works through the pool on its own, and you take it out when it is done.
- A cordless pool vacuum is usually a handheld unit on a pole. You push it around yourself. It is far cheaper, it is genuinely useful for spot cleaning a step or a corner, and it cleans nothing at all while you are not holding it.
Both are real products and neither is a scam. But a search for a cordless pool vacuum returns mostly the handheld kind, so if you are expecting a robot for that price, the disappointment is built in before the box arrives. We do not sell or recommend the handheld class, so this page covers only the machines that drive themselves.
Runtime is the only specification that matters here
Everything else on a cordless robot's spec sheet is shared with its corded cousins. The battery is what makes it a different purchase, so read the runtime figure carefully and then discount it. Manufacturers quote a best case: warm water, clean filter, flat floor. Cold water, a loaded filter basket and a lot of wall climbing all take a bite out of it.
| What the quoted runtime assumes | What takes a bite out of it |
|---|---|
| Warm water | Cold water |
| A clean filter | A loaded filter basket |
| A flat floor | A lot of wall climbing |
The useful way to think about it is sessions, not hours. A machine that finishes your pool in one go is a machine you will keep using. One that stops with a quarter left becomes a chore, because now you are waiting for a recharge and running it twice.
That is the single most common reason a cordless robot ends up back in its box, and it is a sizing mistake rather than a product fault.
Solar models, which WYBOT sells several of, are a genuine attempt at this problem: they top the battery up between sessions so charging stops being something you remember to do. They cannot beat the weather, so judge them on shoulder season reports rather than midsummer ones.
Three cordless machines worth understanding
These are not the whole market. They are three points on the curve that show what changes as you spend more. For the full range and the price bands, the main comparison covers every model, and for what each brand is like to buy from, see the brand by brand reviews.
One thing to hold in mind across the two Beatbot cards below: it is a young brand with a thinner independent record than Maytronics, which is the trade you are making for the newer machine.
Where cordless stops being a compromise: Beatbot Sora 70
Cordless, cleans the floor and the water surface, two colours at the same price and both now shipping
$1,099.00 Prices verified September 24, 2026. Confirm the current price on the retailer page before buying.
Check price at BeatbotThis is the model where a cordless machine stops asking you to give something up: enough battery and enough coverage for a normal domestic pool, without stepping into AquaSense money. A bigger battery than this would go unused on that pool.
Keep in mind: It is still a battery machine, so a pool long enough to outlast one charge turns a single session into two. Size it against your pool before the colour.
Best for: A normal sized domestic pool where the floor and floating debris are the problem, bought once you have checked it finishes the pool in one session.
Full specification
| Cleaning coverage | Floor and water surface |
|---|---|
| Power | Cordless |
| Variants | Lavender Purple and Midnight Blue, same price |
| Availability | Both colours in stock as of our September sweep. ⚠️ THIS CHANGED: in July the product page carried a colour-specific alert reading "Pre-Order Now, Sora 70 Midnight Blue Ships in Early August", and that alert is gone. The lesson survives the alert: a Beatbot colour can be on a different footing from its twin, and only the product page ever says so |
| SKU | RCFPM011-NAA-B (Lavender Purple), RCFPM011-NAA-A (Midnight Blue) |
For pools that outlast smaller batteries: Beatbot AquaSense 2 Ultra
Cordless, five-in-one cleaning with AI camera mapping, side brushes for the water surface, in stock with no pre-order notice
$2,299.00 Prices verified September 24, 2026. Confirm the current price on the retailer page before buying.
Check price at BeatbotIf a smaller cordless machine leaves the far end of your pool for tomorrow, this is the answer, and it is one of the few in the range you can buy today without reading an alert first. The surface brushes matter more than the mapping: leaves dealt with before they sink are leaves you never have to scrub off. It is more machine than a small pool will ever use.
Keep in mind: It is well over twice the price of the Sora 70, and most of that gap buys endurance and features rather than better scrubbing.
Best for: A large pool that a smaller cordless machine cannot finish in one session, especially under trees.
Full specification
| Cleaning coverage | Five-in-one, including the water surface via side brushes |
|---|---|
| Power | Cordless |
| Navigation | HybridSense pool mapping with an AI camera, plus debris detection |
| Availability | In stock. No pre-order notice on the product page, and the listing badges it as a bestseller |
| Variants | Standalone, and a bundle with an iSkim skimmer at a higher price |
| SKU | PRCMDS02-NA-A |
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The established brand's cordless middle: Dolphin Liberty 400
Cordless, 3 year cover on Maytronics' own spec block, price read off Maytronics' own store page for the model none
$1,429.00 Prices verified September 24, 2026. Confirm the current price on the retailer page before buying.
We earn nothing if you buy this one. We have no affiliate link with this brand, so there is no button here.
Battery machines are where a service record earns its keep, because the part most likely to end the cleaner is the one part that wears out on a schedule. This is the brand with the longest such record, and unusually for it, three years of cover rather than the one the Nautilus models carry. It sits between the Nautilus EON models and the larger Liberty units.
Keep in mind: The Liberty ladder is hard to read, because the steps between models are mostly battery and navigation rather than better cleaning.
Best for: A buyer who treats warranty length as the deciding spec on a battery machine, and is willing to phone for the details.
Full specification
| Power | Cordless |
|---|---|
| Warranty | 3 years, read from Maytronics' own spec block. The Nautilus models below it carry 1 |
| Price | Read off Maytronics' own store page for the Liberty 400 in our September sweep, where it sits with an Add to Cart button and a 3 year spec line, and it matches the category table |
| Our position | We hold no affiliate relationship with Maytronics, so there is no button on this card and no link out |
What to check before you buy a battery machine
- Can the battery be replaced? On some machines it can, on others its failure ends the cleaner. Ask before buying, because this decides whether you are buying a machine for three years or for eight.
- How does it come out of the water? A cordless robot has no cable to pull it back with. Some park themselves at the edge when they finish or run low; with others you are reaching in with a hook.
- What does the return actually cost? These are heavy items. Restocking fees and return shipping decide whether a sizing mistake costs you nothing or costs you hundreds.
Frequently asked questions
How long does a cordless robotic pool cleaner run on one charge?
Makers quote runtimes in the region of an hour and a half to three hours depending on the model, and the honest way to read that number is as a ceiling rather than a promise. Cold water, a dirty filter and heavy climbing all shorten it. The practical question is not the runtime figure, it is whether one session finishes your pool.
Is a cordless robotic pool cleaner better than a corded one?
For most domestic pools, yes, because the cable is the part people actually hate. For a large pool the answer flips: a corded machine keeps working past the point where a battery gives up, and a robot that stops three quarters of the way through is worse than one trailing a wire.
Is a cordless pool vacuum the same as a cordless robotic pool cleaner?
Usually not, and the wording costs people money. Most products sold as a cordless pool vacuum are handheld units you push around on a pole, which are cheap and useful for spot cleaning but clean nothing while you are not holding them. A cordless robotic cleaner drives itself. If a listing shows a pole, it is the handheld kind.
Do solar powered pool cleaners work?
Solar addresses the real weakness of cordless machines, which is that charging is a chore you have to remember. What it cannot do is beat physics: a cloudy week or a shaded pool means less charge, so the benefit is largest in exactly the conditions where you needed it least. Read owner reports from spring and autumn rather than midsummer.
How long do the batteries last before they need replacing?
The battery is one of the parts most likely to end a machine, alongside the pump motor and the drive tracks. Expect it to be the limiting factor within a few seasons of regular use, and check before buying whether the battery can be replaced at all or whether its failure means replacing the whole cleaner.