jackery.com website review

The page has 15,195 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

7 files block the first paint until they finish downloading. Deferring or inlining them could save about 1.4 s.

Your mobile performance score is 46. Under 50 is Google's “poor” band: many phone visitors leave before the page is usable.

A phone's processor spends 8.2 s on main-thread work while loading, 3.7 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

8 third-party services load with your homepage (Cookiebot, Affirm and convbox.ai and others), adding 1.0 MB and 1.3 s of main-thread time.

Cookiebot costs a phone 784 ms of main-thread work and 218 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

15 files are served with short cache lifetimes, so returning visitors download them again (401 KiB).

About 360 KiB of JavaScript is downloaded but never used on this page.

Affirm costs a phone 284 ms of main-thread work and 169 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

20 long tasks block the main thread while loading, the longest for 294 ms. During a long task the page ignores taps.

About 54 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 150 ms faster on a phone.

4 images could be 149 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen.

44 KiB could be saved by minifying JavaScript.

Polyfills for old browsers add 22 KiB JavaScript that modern phones do not need.

14 KiB JavaScript is shipped twice across bundles.

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

Scripts make the browser recalculate the layout repeatedly while the page loads, which wastes processor time on phones.

4 KiB could be saved by minifying CSS.

Real Chrome users on phones do not pass Google's Core Web Vitals on this page (28-day field data from the Chrome UX Report (opens in a new tab)). Google uses this in ranking.

The page becomes fully interactive after 22.7 s. Good is under 3.8 s.

Your largest element takes 7.6 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image “Promotional banner image”.

Visually, the page fills in at 10.0 s (Speed Index). Good is under 3.4 s.

Scripts block taps and scrolling for 839 ms in total while the page loads. Good is under 200 ms.

Real visitors wait 245 ms for the page to respond to a tap (75th percentile). Good is under 200 ms.

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' tap response (inp) went from 285 ms to 271 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Over the last 25 four-week periods to 2026-10-31, real Chrome visitors' largest content (lcp) went from 2.9 s to 2.5 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 5.0 MB in 394 requests on a phone: images 2.2 MB (131), scripts 1.5 MB (128) and other files 821 KiB (107). Under 2 MB keeps phones on slow connections fast.

By the Sustainable Web Design model, a visit to your homepage emits about 1.43 g of CO₂e: 171.4 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

18 text elements don't have enough contrast against the background to read easily, especially outdoors on a phone.

9 elements use ARIA attributes their role does not allow, which confuses screen readers.

4 images have no alt text, which hurts accessibility and image search.

Landmarks should have a unique role or role/label/title (i.e. accessible name) combination: 6 elements on the page fail this check, rated moderate by axe-core.

All page content should be contained by landmarks: 2 elements on the page fail this check, rated moderate by axe-core.

Headings skip levels (h1 → h3 and h2 → h4), which makes the page harder to scan with a screen reader.

Your meta description is 203 characters; Google truncates after about 160, so the end of your pitch is cut.

11 links use generic text like “click here” or “learn more”, which tells Google nothing about the page behind them.

1 link has no real href, so search engines can't follow it.

The homepage links to 605 pages on jackery.com and 18 external pages.

/products/jackery-solar-generator-5000-plus, /products/jackery-solar-generator-homepower-3600-plus and /products/jackery-solar-generator-homepower-3600-pro-max have no <h1> headline, so visitors and search engines get no clear main topic.

We fetched 15 pages linked from your homepage (of 152 found) and read each the way a search engine does.

HSTS is set, but max-age is 91 days; one year is the recommended minimum.

No Referrer-Policy header, so full URLs can leak to the sites you link to.

No Permissions-Policy header to switch off camera, microphone and location for embedded content.

X-XSS-Protection is set to “1; mode=block”; the header is deprecated and can introduce bugs. Use 0 or remove it.

There is no /.well-known/security.txt telling researchers how to report a security problem to you.

jackery.com's DNS answers are not signed. DNSSEC stops attackers forging them to send visitors or email elsewhere; most registrars switch it on in a click, though most sites still run without it.

On a phone, there is no call to action on the first screen: visitors have to scroll to find out what to do next.

Your homepage shows a street address but no LocalBusiness JSON-LD, so Google and AI assistants have to guess your address, hours and phone from the page text.

A local customer looking to call finds no phone number on the homepage. Add one, ideally as a tap-to-call link.

Social proof on the homepage: 1 trust badge. Pairing it with named testimonials or customer logos makes it far more convincing.

No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach you.

The homepage shows no opening hours. If customers visit or call, show when.

There is no form on the homepage, so every lead has to click through to another page first.

There is no link to Google or Apple Maps. A directions link is one tap for a phone visitor.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

The homepage carries about 1,548 words of visible text.

DMARC is set to p=none, so mail pretending to be jackery.com is still delivered. Add a report address, check the reports, then move to quarantine.

Email authentication: SPF record 25 points, plus 15 when it ends in -all (10 for ~all); DMARC record 25, plus 25 for a reject policy (15 for quarantine); a DKIM key on a common selector 10.

Before a visitor clicks anything, the page loads Klaviyo (measured from a US location before any click). A consent tool (Cookiebot) is installed; check it blocks these until visitors agree where the law requires it.

Opening the homepage sets 4 cookies (measured from a US location before any click).

Loading the homepage contacts 10 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.