Quick Answer: Whether you can replace a pool cleaner’s battery yourself depends entirely on the brand. Polaris explicitly bans DIY battery work on its FREEDOM cordless line — the official manual requires a service professional — and the OEM battery block (R0972000) costs $619.95–$780.99 depending on retailer. Aiper and WYBOT don’t sell an official battery at all, but owner-installable aftermarket packs run $35.89–$75.90 depending on model. Beatbot lists no standalone battery in its own store, pointing to a sealed pack handled through warranty. Corded robots like the Dolphin Nautilus CC Plus have no battery at all — they run off a deck-mounted transformer.
Cordless robotic pool cleaners eventually lose the ability to hold a charge, and what happens next splits hard by brand. Some manufacturers sell you the exact part and expect you to leave it to a professional. Others don’t sell a battery at all, leaving the aftermarket to fill the gap. This guide rounds up the real, verified options by brand so you know what to expect before your cleaner stops charging.
Pool cleaner batteries at a glance
| Cleaner | Battery type | Price | DIY-installable? | Source |
|---|---|---|---|---|
| Polaris FREEDOM / FREEDOM Plus | R0972000 OEM Battery Block, 9.6Ah/29.4V | $619.95–$780.99 | No — service professional required | Sunplay / PoolZoom |
| Aiper Scuba S1 / S1 Pro | Aftermarket, 7,800mAh | $75.90 | Yes, owner-installable | BatteryInt |
| Aiper Scuba SE | Aftermarket, 3,200mAh / 11.1V | $35.89 | Yes, owner-installable | BatteryClerk |
| WYBOT A1 | Aftermarket, 3,500mAh / 22.2V | $69.90 | Yes, owner-installable | BatteryInt |
| Dolphin Liberty 300 | OEM, 5652292LF-ASSY | $1,036.99 | No — exceeds cost of a new unit | InyoPools |
| Beatbot AquaSense line | Sealed, no standalone part listed | n/a | No — warranty/support only | mybeatbot.com accessories store |
| Corded models (Dolphin Nautilus, most Hayward/Zodiac) | None — powered by deck cable | n/a | n/a | — |
1. Polaris R0972000 Battery Block — the only OEM part that says “don’t touch this”
Polaris FREEDOM / FREEDOM Plus Battery Block (R0972000)
- The official Fluidra parts addendum (document 28539.3_SA) lists R0972000 as "Battery Block CB," key 2 on the exploded diagram — sold direct as a named replacement part, not bundled into a repair kit.
- Real retailer spread on the identical part number: $619.95 at Sunplay vs. $780.99 at PoolZoom, a 26% difference — worth checking both before ordering.
- Not user-serviceable: the FREEDOM Owner's Manual (H0748900) section 6.7 requires a qualified service professional and explicitly warns against disassembling the pack yourself.
- Specs per the manual: 9.6Ah capacity, 29.4V DC supply, 29.4W operating power.
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Widely repeated error worth flagging: several third-party listings cite R0972700 as the FREEDOM battery. It isn’t — Fluidra’s own parts table lists R0972700 as the Motor Block Kit, a completely different $700+ part. Ordering the wrong one is a costly mistake on a component this expensive. See our full Polaris parts guide for the rest of the FREEDOM’s serviceable parts, since brushes and tracks — unlike the battery — are owner-DIY per the same manual.
2. Aiper Scuba S1 / S1 Pro aftermarket battery — best value for a mid-size cordless robot
7,800mAh Aiper Scuba S1 Replacement Battery
- Aiper doesn't list an official standalone battery in its own store — this and similar aftermarket packs fill that gap, engineered specifically for the Scuba S1 and S1 Pro.
- 7,800mAh capacity, marketed as sufficient to cover pools up to 1,600 sq. ft. on a single charge.
- Ships with a sealing gasket kit and carries an IPX8 waterproof rating, matching the underwater duty cycle of the original pack.
3. Aiper Scuba SE aftermarket battery — cheapest option on this list
3,200mAh Aiper Scuba SE Replacement Battery
- 11.1V, 3,200mAh Li-ion pack (part reference HYY0345210), the smallest and cheapest battery in this roundup — matching the Scuba SE's own budget positioning in our [best above-ground pool cleaner guide](/best/best-above-ground-pool-cleaner/).
- Backed by a 1-year retailer warranty plus a 30-day return window, cheaper insurance than most OEM parts carry.
4. WYBOT A1 aftermarket battery — model-specific, not interchangeable
22.2V 3,500mAh WYBOT A1 Replacement Battery
- Like Aiper, WYBOT's own parts-and-accessories store doesn't list an official standalone battery — this aftermarket pack is engineered exclusively for the A1 and is explicitly not compatible with other WYBOT models (C1, C2 Vision, S2, S3).
- 22.2V / 3,500mAh (77.7Wh), sold as a direct pack swap with no soldering required.
- If you're not sure which WYBOT model you own before ordering, cross-check against our [best WYBOT pool cleaner guide](/best/best-wybot-pool-cleaner/).
Brands with no standalone battery listing: Beatbot and Dolphin’s premium cordless line
Not every brand sells you a battery part at all. Beatbot’s own accessories store (mybeatbot.com) lists replacement filters, brushes, docks, and covers for the AquaSense line — but no standalone battery pack. That’s consistent with a sealed unit meant to be handled through Beatbot’s warranty program rather than a customer-facing part number, and it lines up with the site’s existing repair-vs-replace research: Maytronics prices its own Dolphin Liberty battery (5652292LF-ASSY) at $1,036.99 through InyoPools, more than a complete new Dolphin Liberty 300 at roughly $999. On both brands, price a full replacement unit before assuming a battery swap is the cheaper path — our pool robot repair guide covers the 40-50%-of-new-unit rule of thumb for when replacing wins outright.
Corded models don’t have this problem
If your cleaner is a Dolphin Nautilus CC Plus, Dolphin Premier, Hayward Navigator, or most Zodiac MX-series units, none of this applies — corded robots draw continuous power through a low-voltage deck-mounted transformer instead of an onboard battery, so there’s nothing to charge or eventually replace. See our best robotic pool cleaner guide if you’re weighing a corded model specifically to avoid battery maintenance altogether.
The bottom line
Battery replacement on a cordless pool cleaner splits sharply by brand. Polaris FREEDOM owners face the most expensive and most restricted option — the $619.95–$780.99 R0972000 block, professional-install only. Aiper and WYBOT owners have it easiest: $35.89–$75.90 aftermarket packs, owner-installable, model-specific. Beatbot and premium Dolphin cordless owners should price a full new unit before chasing a battery replacement — on at least one flagship line, the battery alone costs more than the robot. And if your cleaner is corded, this entire question doesn’t apply to you.
For the wider repair-vs-replace math across every failure type, see our pool robot repair guide; for Polaris-specific parts beyond the battery, see the Polaris parts guide.