OZTECH Lab Core Power Bank S: their last campaign is marked delivered, and they still answer its comments

A 78-gram power bank for trail runners, from the first maker on this site whose previous Kickstarter carries the platform’s own fulfilment complete marker. That campaign delivered to 1,724 backers, and its creator was still answering comments on it on 23 August 2026 — four months after it closed. This one has 1,418 backers and runs until 9 October 2026.

Maker: OZTECH Lab, Hong Kong
Delivery risk: Lower than most live campaigns. One previous campaign, marked delivered by Kickstarter, with public shipping updates naming dates and carriers — Kickstarter creator page.

This is a Watching page. Backing a crowdfunding campaign is not a purchase. Projects can be delayed or fail to deliver, and nothing here has been received by anyone.

Kickstarter itself says the last one arrived

OZTECH Lab’s previous campaign, the Air-Lock Bag, closed in April 2026 with 1,724 backers and HK$1,413,767 against a HK$78,160 goal, and it carries Kickstarter’s own fulfilment-complete marker — the strongest delivery signal the platform displays.

It is a signal, not a guarantee. On a different campaign carrying the same marker, we found backers still chasing missing parcels and unanswered support months after it was set — see our page on GENKI Manta. The marker says fulfilment is reported finished. It does not say every backer has their box. What follows is the paper trail underneath this one.

Update #4, posted publicly on 14 May 2026, gives the shipping date, a 10–14 day estimated transit, the carrier method, China as the origin, tracking through PledgeBox, and that 85% of backers had completed the address survey by then. A maker inventing a shipment does not publish a survey-completion percentage.

What the comment thread shows — both halves of it

That campaign has 239 comments, and every backer question in the recent thread has a reply, usually within a day. One backer asking where his parcel had gone was told it had already been delivered, checked, and confirmed he had mislaid it. Same-day replies four months after a campaign ends is not common behaviour. Another wrote that the bags “saved a ton of space” on a driving holiday across four countries.

The same thread carries the other half. In the days before 23 August 2026 — three months after shipping began — backers #417 and #1480 were both still asking when their orders would arrive. The creator’s reply to a third, blunter question shows part of the cause: that backer had never completed the address survey. Not every delay was the maker’s. Some backers still waited a long time. One also reported the bag’s pump stopping after roughly eight uses, having worked well until then — a single report, and the only account of a failure we found.

The record above belongs to a different product

Everything reassuring so far concerns a travel bag. What is on sale here is a lithium battery.

A bag that seals air and a battery that stores energy are not the same engineering problem, and a record of shipping the first does not transfer to the second. This campaign has posted no updates of its own. Its 15 FAQ answers were all revised between 19 and 21 August 2026, so the page is maintained — but a maintained FAQ is not a delivery record.

Read from the campaign page on 25 August 2026 and subject to change.

The safety claims are the maker’s own tests

The campaign leads on a semi-solid-state cell, which uses less liquid electrolyte than conventional lithium-ion. The claimed results are striking: no fire or explosion after three punctures, and none under a three-ton compression test.

Every one of those results is prefaced “in our safety tests”. No laboratory is named, no standard is cited, and no certification number appears on the page or in its FAQ — no UN 38.3, no CE, no FCC. For a battery you intend to carry against your body while running, that is the thing a reader would most want to check.

Capacity is given as 5,000 mAh. Airline rules for lithium batteries in cabin baggage are written in watt-hours, and carriers ask to see that figure on the cell. No watt-hour rating is published anywhere on the page. A 5,000 mAh pack is very unlikely to approach any airline limit — but a product sold for travel does not print the number a gate agent asks for.

Someone has handled this kind of battery. Not this one.

No independent writer has held a Core Power Bank S, because none exists outside the factory. But semi-solid-state power banks are no longer theoretical. Ben Lovejoy tested one for 9to5Mac on 8 May 2026 — a Zens, a different product from a different company, so none of it applies here directly. What it gives is the shape of the category: the Zens 5,000 mAh version is 8 mm thick at US$59.99 and roughly doubled the battery life of a fully-charged iPhone 16 Pro Max.

This campaign claims 5,000 mAh at 5.8 mm, from HK$250. Thinner and cheaper than the shipping product in the same category — which is the promise, and the part nobody outside the company has checked.

The tiers

The tier called “Super Early Bird” is the worst price on the page. HK$468 buys two units; “Launch Special” buys the same two for HK$437. A hundred and fifty-six people took the expensive one and 500 took the cheaper one, so backers are reading the numbers rather than the names. This is the third campaign in a row where the reassuring word in a tier name pointed at the higher charge.

We published this on 25 August 2026 saying the entry price had held. Three days later it had not. What we wrote then was true at the time: between 23 and 25 August the single-unit tier went from 200 places to 300 and the two-unit tier from 400 to 500, so the campaign was adding places where others closed them.

Read again on 2 September 2026, both of the tiers we called cheapest are gone. Launch Special ×2 at HK$437 — HK$219 per unit, the best price anywhere on the campaign — sold out at 500 backers. Launch Special ×1 at HK$234 sold out at 400. The cheapest single unit is now HK$250, and the cheapest price per unit is HK$234, on the two-unit Super Early Bird at HK$468.

The maker did keep adding places. Just not to the cheap tiers. Between 25 August and 2 September the two-unit Super Early Bird went from 100 places to 150 and then to 200, the single-unit Super Early Bird from 100 to 150, and the Family Pack from 50 to 60. Every one of those sits above the entry price.

So both of our earlier readings were right, and they were never in conflict. This campaign adds places, and the entry price still steps up, because the places it adds are on the dearer tiers. That is a more useful thing to know than either half on its own, and we only found it by being wrong twice in a week. Anyone reading this after 2 September 2026 should check the campaign page rather than our table.

The discounts are measured against a price nobody has paid. Every tier quotes a saving off a US$49-per-unit MSRP, and this product has never been sold at retail — that figure is one the maker chose, not one the market set. The Hong Kong dollar charge is the part that binds.

Two costs sit outside the pledge. Shipping is collected after the campaign, so the total is unknown at pledge time; and European orders are told to expect roughly €3–5 in customs. Saying so in advance is better practice than most campaigns manage, and it is still money on top.

What has been written from outside

The campaign opens with a section headed “The Reviews Are In”. It is not reviews. The section is a row of badges reading “Featured on” — BackerWeb, BackerMany, Backer Rock, Backerspaces, Hunt4best, reBackers and KickstarTech. These are crowdfunding promotion services, not publications, and two of them, BackerWeb and Hunt4best, are listed as this campaign’s own collaborators on its creator page. A badge from a firm working on the campaign is not an outside opinion of it.

One page outside the campaign exists, and it is not a test either. A write-up on mensgear.net restates the campaign’s claims and links back to it. It carries no byline and no date, credits its images to OZTECH Lab, and contains nothing indicating anyone handled the product.

The campaign does disclose its main promoter: the page states the project is promoted by Jellop, an advertising firm. That is the maker’s own disclosure, and part of how a young campaign reaches 1,418 backers.

Reasons to back it

• Kickstarter’s own fulfilment marker on the previous campaign — the strongest delivery signal the platform shows
• 1,724 backers served, with a public update naming shipping date, method, origin and tracking
• The creator answers comments within a day, four months after that campaign ended
• A 2-year worldwide warranty, stated from the delivery date
• Backers read the charges rather than the tier names — 500 took the cheapest per-unit tier, 46 the pricier one called “Super Early Bird”
• European customs costs are disclosed on the page rather than discovered later

What is not settled

• Every safety result is the maker’s own test. No laboratory, no standard, no certification number
• No watt-hour rating is published, which is the figure airline rules are written around
• The delivery record belongs to a bag, not a battery, and this campaign has posted no updates
• Nothing has shipped; stated delivery is November 2026, and shipping is charged afterwards
• The section headed “The Reviews Are In” is promoter badges, two of them from firms working on the campaign

Where this leaves a buyer

This is the clearest delivery record of any live campaign on this site: a previous product marked delivered by Kickstarter, 1,724 backers served, and a maker still replying to them months later. Weigh that against what is being sold now. A battery is a different engineering problem from a bag, and the certification and watt-hour figures a careful buyer would check are not on the page. Back it on the maker’s record and the price — not on the safety claims, which nobody outside the company has checked.

FAQ

Has this maker delivered before?
The Air-Lock Bag campaign closed in April 2026 with 1,724 backers and carries Kickstarter’s fulfilment-complete marker, and its shipping update names dates and tracking. That marker is a signal rather than a guarantee — see the section above.

Is the battery certified?
The campaign publishes no certification number — no UN 38.3, CE or FCC. Its safety results are described as the maker’s own tests.

Can I take it on a plane?
We cannot tell you. Airlines work from the watt-hour figure printed on the cell, and the campaign does not publish one.

What will it cost in total?
From HK$250 for a single unit — the HK$234 tier sold out at 400 backers — plus shipping collected after the campaign, plus roughly €3–5 in customs for European destinations.

Where to buy

Loupe has not handled this product. Every figure above is linked to the source it came from.