H2CAP Plus

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Specifications

Hydrogen Water Bottle Specifications: H2CAP PLUS Full Specs

Every hydrogen water bottle specification below is the manual-confirmed figure we build to — not a marketing peak. Dimensions, materials, power draw, and the output range you can expect.

Dissolved hydrogen (DH)1,000–1,500 ppb
ORP−400 to −800 mV
Power draw4.5 W max, USB (no battery)
Weight53 g
Cap compatibility28 mm / 30 mm bottle necks
Cycle time3.5–5 min (water-quality dependent)
Electrode9-layer platinum-coated titanium mesh
MembraneSPE/PEM, dual-chamber
Body & contact materialsSTS304, Tritan, non-toxic silicone
CertificationsCE, RoHS, KC
Before first useCleaning mode required
H2CAP PLUS, the smallest portable hydrogen water bottle cap, 53 grams
53 g, 28/30 mm compatible — sized to travel.
What it's made of

STS304 stainless

Structural housing — corrosion-resistant, food-contact grade.

Tritan

BPA-free copolyester used for the clear housing components.

Non-toxic silicone

Seals and gaskets rated for repeated wet-dry cycling.

The core set that ships with every H2CAP PLUS.
In the box

What's included

Package contents vary slightly by package type — the core set below ships with every unit. Run the two-minute cleaning mode with the included descaler before first use; the manual walks through it.

  • H2CAP PLUS unit
  • Carrying pouch
  • USB cable
  • Descaler (cleaning)
  • User manual
  • Bottle cap adapter

One row of the table deserves a note: USB, no internal battery. Power can come from a power bank, a laptop, or a wall adapter, and because nothing inside holds a charge, there is no cell to age, swell, or restrict on flights. The LED tells you the rest — solid white while generating, solid orange when done, blinking orange when the electrode wants a descaler clean, roughly monthly with daily use.

Optional accessories

Tritan bottle

A dedicated 500 ml Tritan bottle with a 30 mm neck, matched to the recommended fill volume in the hydrogen water bottle specifications above.

Descaler set (20 pcs)

Citric-acid cleaning sachets for the maintenance cycle. The LED blinks orange when the electrode needs a clean — roughly monthly with daily use.

DH / pH test reagent

Measure dissolved hydrogen in your own water instead of taking our word for it — method on the H2 concentration test page.

Reading the numbers

How to compare hydrogen water bottle specifications

Two figures do most of the work when you compare devices. The first is dissolved hydrogen in ppb — parts per billion of H₂ actually in the water, the only performance metric that matters. Watch the test conditions: our 1,000–1,500 ppb range covers a single cycle in tap water through a double cycle or mineral water, and the 1,036 ppb third-party figure was measured immediately after generation, not minutes later when gas has escaped. A spec sheet that lists a peak number without conditions is telling you very little.

The second is what happens at the anode. Hydrogen water bottle specifications rarely mention ozone or chlorine, but any single-chamber electrolyzer produces them into the drinking water. Look for an SPE/PEM membrane in the electrode description — it is the line that separates the two device classes. Dissolved-gas measurement itself is standard analytical chemistry; the ORP value we publish (−400 to −800 mV) is measured on a WTW MultiLab Pro 40 IDS, a benchtop instrument from Xylem Analytics, and our ppb figures come from a Trustlex ENH-2000 — the same meter class used in most published hydrogen water studies.

Weight matters more than it looks: at 53 g, the cap goes where a 400–600 g bottle-style generator stays home. If portability is why you are buying, that single row of the table may decide it. See how these numbers stack up against six competing devices on the comparison page.

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