Zodiac Battery Block CB LiFi - FreeRider FR2000 iQ - R1021600
Zodiac Battery Block CB LiFi - FreeRider FR2000 iQ - R1021600 is temporarily out of stock and will ship as soon as it's available.
Don't Guess - Ask Us!
Don't Guess - Ask Us!
Not sure if it’s the right part? Send us a message and a photo of what you’re replacing, or what you need, and we’ll help make sure you get the right part the first time.
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Delivery and Shipping Info*
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Zodiac Battery Block CB LiFi - FreeRider FR2000 iQ - R1021600
Zodiac Battery Block CB LiFi - FreeRider FR2000 iQ - R1021600 is temporarily out of stock and will ship as soon as it's available.
Zodiac Battery Block CB LiFi - FreeRider FR2000 iQ - R1021600
Genuine Zodiac R1021600 - the complete LiFi lithium-ion battery block for the FreeRider FR2000 iQ cordless robotic pool cleaner. The LiFi block carries the light-based communication hardware that pairs the cleaner with its remote.
- We keep these physically in stock for fast shipping or local pick-up, unlike most drop-shipping websites.
- Shipped from VIC, NSW, WA, QLD
LiFi or Basic - check before ordering
The FreeRider CB range uses two battery blocks. They are not interchangeable, so match the part number on your existing block.
- Battery block CB LiFi - R1021600: this product, FreeRider FR2000 iQ
- Battery block CB Basic - R0972000: FreeRider FR1000 iQ, no LiFi hardware
The FreeRider FR500 iQ and FR800 iQ use a different chassis and a different battery block again (R1087200). This block will not fit those models.
Suits the following robotic pool cleaners
- Zodiac FreeRider FR2000 iQ (WR000508)
Related LiFi parts
- LiFi remote - R1021400: the handheld remote
- LiFi receiver - R1021700: the receiver unit
- Remote clip - R1021300: the remote holder
Part details
- Manufacturer part number: R1021600
- Type: Lithium-ion battery block with LiFi, complete
- Capacity: 9.6Ah
- Supply voltage: 29.4V DC
- Chassis platform: CB (cordless battery)
- Genuine: Yes, genuine Zodiac spare part
When to replace it
- Run time has dropped well below a normal cycle
- Cleaner will not hold charge, or shuts down partway through a clean
- Battery will not charge or will not take a full charge
- Remote will no longer pair or communicate with the cleaner
- Block is swollen, damaged or has water ingress
Before replacing the block, confirm the charging station and charger are working. If the fault is remote communication rather than run time, check the receiver R1021700 first.
Fitment disclaimer
The models listed above are the applications we have been able to confirm. Zodiac revises part numbers over time and uses several similar battery blocks across the cordless range, so this list may not be exhaustive and your machine may use a different part. Always match the part number on your existing block, or contact us with photos plus your model and serial details, before ordering.
As with all products, these must be diagnosed and fitted by a qualified and experienced person.
Manufacturer Catalogues, Diagrams & Part Numbers
Need exploded views, spare part numbers, product numbers, diagrams, or more product information? See the manufacturer catalogues: Astralpool Catalogue 2026 | Zodiac Catalogue 2026
To the layperson, plumbing sizes and their names can be confusing due to the nominal sizes and naming conventions used.
This is not something we made up. Plumbers and manufacturers have used nominal (meaning ‘by name only’) sizing for decades.
Simply put, in plumbing, named sizes are often not the actual measurements of the pipe, fitting, or part. A PVC pipe called “50mm” or “2"” does not measure 50 mm anywhere. Instead, it follows nominal sizing, an internationally-standardised naming system.
Almost all fittings we use in the pool & spa industry use “pressure PVC” pipe & fittings. Do not confuse with “DWV” or other pipe & fittings and their names and sizes.
Use the Outside Diameter (OD) to check your pipe against fittings. Below is a quick reference for common spa & pool pipe sizes:
| Imperial Name | Metric Name | Pipe Diameter (OD) |
|---|---|---|
| 1/2" | 15mm | ~21.2–21.5 mm |
| 3/4" | 20mm | ~26.6–26.9 mm |
| 1" | 25 mm | ~33.4–33.7 mm |
| 1.5" | 40 mm | ~48.1–48.4 mm |
| 2" | 50 mm | ~60.2–60.8 mm |
| 2.5" | 65 mm | ~75.2–75.5 mm |
To reiterate, these are nominal sizes and are designed to fit matching fittings — not to measure what their name suggests. These are based on PVC Pressure Pipe AS/NZ 1477 Dimensions1.
- º Internal diameters vary slightly by manufacturer and class.
- 1 Not all pool/spa fittings match these dimensions exactly. Some do not follow Australian or international standards. Chinese spas may use proprietary fittings.
Understanding Plumbing Sizes & Nominal Measurements
Plumbing sizes can be confusing. PVC and many other pipe systems use nominal sizes—the size is a name, not the exact measured dimension. This convention is used across most pool and spa systems and other plumbing areas so that pipes and fittings remain compatible.
Why pipe sizes don’t match the measurements
The Nominal Pipe Size (NPS) system standardises pipe dimensions so that pipes, fittings, valves, and accessories interoperate.
Plumbers work with these nominal names every day, but DIYers can be tripped up if they try to match by a tape-measure alone.
How to Measure Pipe Correctly
-
Pipe size is identified by:
- The pipe’s Outside Diameter (OD).
- The fitting’s Inside Diameter (ID) (socket opening).
- Pipe Class / Schedule (e.g., Class 9, 12, 18 or Sch 40) relates to wall thickness and therefore the Internal Diameter (ID) and pressure rating.
- The outside diameter of a fitting is not useful (wall thickness varies by manufacturer).
Hose & Tube Dimensions
Common flexible hose sizes used in pool/spa systems (approximate IDs).
| Imperial Name | Metric Name | Inside Diameter (ID) |
|---|---|---|
| 3/8" | 9–10 mm | ~9 mm |
| 3/4" | 19 mm | ~19 mm |
BSP – British Standard Pipe Thread Sizes
BSP thread names are also nominal. The thread OD will not equal the nominal name.
| BSP Thread Size Naming | Outside Diameter (mm / inch) | TPI |
|---|---|---|
| 1/16" BSP | 7.7 mm / 0.304" | 28 |
| 1/8" BSP | 9.7 mm / 0.383" | 28 |
| 1/4" BSP | 13.16 mm / 0.518" | 19 |
| 3/8" BSP | 16.66 mm / 0.656" | 19 |
| 1/2" BSP / 15 mm | 20.99 mm / 0.825" | 14 |
| 5/8" BSP | 22.99 mm / 0.902" | 14 |
| 3/4" BSP / 20 mm | 26.44 mm / 1.041" | 14 |
| 7/8" BSP | 30.20 mm / 1.189" | 14 |
| 1" BSP / 25 mm | 33.25 mm / 1.309" | 11 |
| 1-1/4" BSP | 41.91 mm / 1.650" | 11 |
| 1-1/2" BSP / 40 mm | 47.80 mm / 1.882" | 11 |
| 2" BSP / 50 mm | 59.61 mm / 2.347" | 11 |
| 2-1/4" BSP | 65.71 mm / 2.587" | 11 |
| 2-1/2" BSP | 75.18 mm / 2.960" | 11 |
| 3" BSP | 87.88 mm / 3.460" | 11 |
| 4" BSP | 113.03 mm / 4.450" | 11 |
| 5" BSP | 138.43 mm / 5.450" | 11 |
| 6" BSP | 163.83 mm / 6.450" | 11 |
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R1021600
