LCP
Largest Contentful Paint
2.4s
Good
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Optimize Image Delivery Performance
How to optimize explore.batterywholesale.com
Shopify SiteScore: 88/100Analyzed January 2026
Optimize Image Delivery Performance
High Impact+6 points estimated
Why It Matters
Images are 788KB larger than needed and delay LCP by 600ms due to oversized files and poor compression.
How to Fix
Configure your image service (battery.twic.pics) to serve appropriately sized images for mobile viewports. Implement responsive images using Shopify's image_url filter with different sizes. Enable better compression settings on your CDN to reduce file sizes by up to 70%.
0Needs Improvement
What This Score Means
A score of 88 falls in the "Needs Improvement" range (50-89). While it is better than poor (0-49), you should aim for 90+ to provide an optimal user experience and maximize SEO benefits.
This site is slower than approximately 35% of similar sites. The main issues affecting performance are image optimization, JavaScript execution time, and layout stability.
Addressing these issues could improve your conversion rate by 15-20% and boost your search engine rankings.
Core Web Vitals Analysis
INP
Interaction to Next Paint
143ms
Good
Good: < 200ms
Measures how quickly the page responds to user interactions
CLS
Cumulative Layout Shift
0.18
Needs Improvement
Good: < 0.1
Measures visual stability - how much content shifts during page load
AI Performance Analysis
This Shopify site has good performance with a score of 88/100, but there are still significant opportunities for improvement. The biggest problem is render-blocking CSS files (particularly Bootstrap) that are delaying page rendering by an estimated 880ms, impacting both First Contentful Paint and Largest Contentful Paint. Additionally, images without explicit width and height dimensions are causing layout shifts (CLS score of 0.182), making the page feel unstable as it loads. Deferring non-critical CSS, adding image dimensions, and optimizing the largest images could easily push this site into the 90+ performance range and create a much smoother user experience.
Other Optimization Recommendations
Eliminate Render Blocking CSS
High Impact+8 points estimatedWhy It Matters:
Bootstrap CSS is blocking initial render, delaying both FCP and LCP by 900ms which significantly impacts user experience.
How to Fix:
Use Shopify's Online Store 2.0 to inline critical CSS directly in the theme's base template. Defer Bootstrap CSS loading using preload with onload fallback, or switch to a lighter CSS framework. Remove unused Bootstrap styles (97% unused) using PurgeCSS or similar tools.
Fix Image Dimensions for CLS
High Impact+10 points estimatedWhy It Matters:
Images without explicit dimensions cause 0.182 CLS score as they shift layout when loading, creating poor user experience.
How to Fix:
Add explicit width and height attributes to all product images in your Shopify liquid templates. Use aspect-ratio CSS property for responsive sizing. Reserve space for images using min-height CSS before they load to prevent layout shifts.
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Related Performance Analyses
More Shopify Speed Tests
Shopify Performance Resources
Add LCP Image Priority Hint
The LCP hero image lacks fetchpriority='high', missing an opportunity to load the most important visual element faster.
Eliminate Render Blocking Resources
CSS files are blocking first paint by 450ms, delaying when users see content and hurting Core Web Vitals scores.
Optimize Product Image Delivery
Large unoptimized images waste 5.6MB and significantly impact loading performance with poor compression and oversized dimensions.
Fix Image Dimensions for CLS
Images without explicit dimensions cause 0.182 CLS score as they shift layout when loading, creating poor user experience.
Frequently Asked Questions
Keep Your Site Fast After Optimization
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