OutdoorMaster Cachalot 2S
The same two-stage architecture as the Shark II with a battery in it, which makes it the only one of the two that works away from a car.
By Scooter M. · Published September 2, 2026 · Last updated September 2, 2026
- Same published 350 and 70 L/min two-stage rates as the corded Shark II.
- 57 Wh / 5,200 mAh internal battery -- no car needed.
- 2.7 lb, lighter than the corded version.
- Around three average boards per charge, on OutdoorMaster's own figure.
On published flow rates this is the same pump as the Shark II: 350 L/min in the high-volume stage, 70 L/min in the high-pressure stage, up to 20 psi. Every timing calculation on this site applies identically to both.
The difference is a 57 Wh lithium battery, and it is the difference between a pump that works where you park and a pump that works where you paddle.
Three boards per charge
OutdoorMaster rates the battery at roughly three average-size paddle boards. That is a genuine constraint and it is worth planning around rather than discovering.
For a day trip it is ample. For three days somewhere without power it is exactly enough with no margin, which is a good reason to carry a hand pump alongside it -- about 1.65 lb of insurance against the worst outcome.
It is lighter than the corded one
Two point seven pounds against the Shark II's 3.6, which is counterintuitive given it carries a battery. The corded pump has to carry nine feet of DC cable and a car-socket connector, and that is not nothing.
Against a 50 lb airline allowance, 2.7 lb for a pump that works anywhere is a reasonable claim on the budget. The battery itself is a separate question: a 57 Wh lithium cell is inside the common 100 Wh carry-on limit, but it belongs in the cabin rather than the hold, and your carrier's published rule is the one that counts.
Who this is for
Anybody who walks any distance to the water, camps, travels, or paddles somewhere without parking at the launch. It is the more useful of the two OutdoorMaster pumps for most people, which is why it is our electric pick.
Who should skip it
Anybody who always parks at the launch. The corded Shark II does the same job with no charge to manage and no per-charge limit, and there is no reason to pay for a battery you will never be away from a socket long enough to need.
OutdoorMaster Cachalot 2S: the published specification
Everything OutdoorMaster publishes for this model, read on September 2, 2026. Rows marked "Not published" are gaps in the manufacturer's own specification -- we do not fill them with estimates.
| Weight (hull or board) | 2.7 lb |
|---|---|
| Weight (full system) | Not published |
| Packed size | Not published |
| Packed linear inches | Not published |
| Inflated | Not published |
| Capacity | Not published |
| Working pressure | 20 psi |
| Floor pressure | Not published |
| Volume | Not published |
| Material | Not published |
| Chambers | Not published |
| Valves | Not published |
| Warranty | Not published |
#ad We earn a commission if you buy through this link, at no extra cost to you. It never changes the ranking. How this site is funded. Prices checked September 2, 2026.
Questions people actually ask
How many boards will the Cachalot 2S inflate on one charge?
Is the Cachalot 2S as fast as the corded Shark II?
Can you take the Cachalot 2S on a plane?
Everyone in this category says they tested twenty boats. We have not tested any, and we say so. What we did instead: pulled the published specifications and the owner's manuals, computed the pump load and the packed volume for every model that publishes enough to compute them, checked the packed sizes against the airline limits you will actually meet, and cited every page we read. The full method.
Sources
Every specification on this page was read from one of these, on the date shown. Specs change between model years, so the date matters as much as the link.
- OutdoorMaster Cachalot 2 specifications — read September 2, 2026
- OutdoorMaster Cachalot 2 listing, Amazon — read September 2, 2026