iMatJet® Additional Batteries — Overview
The iMatJet® Additional Batteries set is a spare or replacement battery pack for the iMatJet® Inflatable Electric Water Lounger. Each set contains two 20 000 mAh battery packs (40 000 mAh / 40 Ah total) that deliver approximately 1.5 hours of cruising per swap — carry as many sets as your session length requires.
Plug-and-play installation means you swap a depleted set for a fresh one on the water in seconds. Charger included.
2 × 20 000 mAh — ~1.5 h Per Set
The pair delivers approximately 1.5 hours of motorised cruising. Real-world runtime depends on rider weight, conditions and throttle use.
Plug-and-Play Swap
The batteries slot into the existing waterproof iMatJet battery housings without tools — swap mid-session for continuous use across a long day.
Original iMatJet Specification
Identical to the factory-fitted packs in the iMatJet standard and PRO sets — no compatibility risk, no third-party cells.
Charger Included
The set ships with the matching iMatJet charger so you can charge the spares while the boat is in use.
Batteries Details & Specifications
Key iMatJet Additional Batteries specs at a glance.
| Per-Set Capacity | 2 × 20 000 mAh = 40 000 mAh (40 Ah) |
|---|---|
| Voltage | 24 V (iMatJet standard) |
| Runtime Per Set | ~1.5 hours (rider- and usage-dependent) |
| Installation | Plug-and-play in the existing iMatJet battery housings |
| Charger | Included with the set |
| Compatibility | iMatJet® Standard and iMatJet® PRO water loungers |
| Source | Manufacturer-original — identical to factory-fitted packs |
Sizing the Right Number of Spare Sets
Match the spare-set count to your expected on-water time:
| Session Length | Spare Sets Needed | Use Case |
|---|---|---|
| 1–1.5 h | 0 (factory set is enough) | Single weekend session |
| 2–3 h | 1 spare set | Yacht day cruise, family afternoon |
| 3–4.5 h | 2 spare sets (or buy the iMatJet PRO) | Full guest day, resort use |
| 4.5 h+ | 3+ spare sets | Charter, multi-guest rotation |
Who is the Spare Battery Set for?
The Additional Batteries set is designed for existing iMatJet owners who want longer sessions:
- Existing iMatJet Standard owners who want 3-knot cruising for multiple hours without recharging stops
- Yacht and charter operators who run continuous guest sessions and rotate batteries between rider groups
- Owners replacing worn packs after 2–3 years of use as cell capacity drops
- Lake- and beach-house owners who keep spare sets pre-charged for spontaneous family sessions
Note: this listing is for the standard battery set (2 × 20 000 mAh + charger). For other iMatJet accessories see the iMatJet SUP Pump.
FAQ — Compatibility, Runtime & Care
Which iMatJet does this battery set fit?
Both the iMatJet® Standard and the iMatJet® PRO use identical battery packs — this set fits either.
How long does one set last on the water?
~1.5 hours of cruising. Real-world runtime depends on rider weight, water conditions and throttle use.
How do I swap batteries on the water?
Plug-and-play — lift the depleted pack from the waterproof housing and slot in the fresh one. No tools required.
Are the batteries original iMatJet?
Yes — supplied direct as manufacturer originals, identical to the factory-fitted packs.
Does the set include a charger?
Yes — one charger ships with the set. Use it to top up spares while the boat is in use.
How long do the batteries take to charge?
The iMatJet packs are designed to fully recharge between sessions — plan for an overnight charge from empty.
How long do the batteries last before replacement?
Under typical recreational use, expect 2–3 years before capacity drops noticeably. Heavy charter use accelerates wear.
How do I store the batteries between trips?
Store at 40–60 % charge in a cool, dry place. Avoid storing at 0 % or 100 % long-term to maximise battery life.
Can I use the batteries in salt water?
The batteries sit in the iMatJet’s waterproof housings during use. Rinse the housings and contacts with fresh water after each salt-water session.
Can I carry the batteries on a plane?
Lithium-ion packs of this size may be restricted on commercial passenger flights. Check the airline rules and IATA dangerous-goods regulations before travelling.
Can I add more than one spare set?
Yes — owners who run all-day sessions typically carry 2–3 spare sets in addition to the factory pack. Alternatively, buy the iMatJet PRO set which ships with 3 sets out of the box.
Does the spare set work as a replacement for a worn pack?
Yes — use this set to replace a worn or damaged factory pack. Performance returns to the factory specification.
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