Shearwater Perdix 2

The tec-diving standard. AA battery, up to 5 gases, CCR-ready.

Open BLE sync (libdivecomputer)

Syncs wirelessly with third-party apps (Subsurface, Currents, etc.), not just the manufacturer app.

4.1Comparison Score

$800

Buy on Amazon Buy on Scuba.com

Released	2022
Max depth rating	200m
Algorithm	Bühlmann ZHL-16C with gradient factors, or VPM-B
Air integration	wireless
Wireless	bluetooth
Display	2.2" sunlight-readable monochrome transflective display
Battery	user-replaceable
Digital compass	Yes
Gas types	air, nitrox, trimix
Gas switches	5
CCR capable	Yes

"Gas switches" is how many different mixes this computer can be programmed to switch between mid-dive, mostly relevant for technical/staged-decompression diving. It doesn't tell you which gas types (air, nitrox, trimix) are supported. See Gas types and the product description above for that.

Pros

Single AA battery, swap it anywhere in the world, no charging cables on a boat
Supports up to 5 gases plus CCR fixed setpoint diving
Dual algorithm choice (Bühlmann GF or VPM-B) and digital compass

Cons

Bulkier and pricier than you need for pure recreational diving
Wireless transmitters for air integration are sold separately
Overkill feature set if you only ever dive single-tank recreational

Diver community sentiment

Mostly positive

Divers on Scubaboard and r/scuba consistently praise the Perdix 2's large, easy-to-read color display, simple two-button interface, user-replaceable AA battery, and Shearwater's customer support and repair turnaround. Recurring gripes include non-customizable screen cycling and skepticism that its upgrades over the older Perdix AI are more cosmetic than essential given the price premium. The most common Reddit debate isn't whether it's a good computer (almost nobody disputes that) but whether it's overkill for pure recreational diving versus the cheaper Peregrine or Teric; owners overwhelmingly defend the purchase as future-proof for eventual technical diving, and reliability complaints are rare.

Scubaboard: Perdix AI vs Perdix 2 Scubaboard: Teric vs Perdix 2 vs Mk2i Scubaboard: Perdix 2 / Petrel 3 announcement thread r/scuba: Is the Perdix 2 overkill for rec diving?

Summarized from public forum discussion (Scubaboard, Reddit, and similar), not a survey we ran ourselves. See the linked threads for the original conversations.

The Perdix is what most technical and cave divers reach for. The AA-battery design is a deliberate choice. No dive computer failure is scarier than one you can’t recharge mid-trip, and a spare AA is available in literally every gas station on Earth.