JBL Endurance Run 2 Wired - Waterproof Wired Sports in-Ear Headphones, JBL Pure Bass Sound, Hands-Free Calls, Never Hurt. Never Fall Out. (Black) Review Analysis
B0C5NQSPMN · amazon.us · Electronics > Headphones, Earbuds & Accessories > Headphones & Earbuds > Earbud Headphones
Last updated: May 2026 · Based on stratified sample of customer reviews
Opportunity Score
The JBL Endurance Run 2 Wired - Waterproof Wired Sports in-Ear Headphones, JBL Pure Bass Sound, Hands-Free Calls, Never Hurt. Never Fall Out. (Black) scores 51/100 on the Sellyze opportunity index. Based on 18,635 customer reviews with a 4.4 star average. Amazon reports 5k+ bought in past month for this product. Analysis identified 29 distinct complaints, with 4 classified as major or critical.
Score Breakdown
The Sellyze opportunity score evaluates products across five dimensions, each scored 0 to 10.
Common Customer Complaints
Sellyze identified 29 distinct pain points from customer reviews. The 6 most prevalent issues are listed below.
1. Earbud Durability
Product Defect · Critical · 3.5% of buyers
Earbud casing and material break or wear out quickly, causing the earbuds to fail within months or even after a few uses.
"the ear bud and a part of the plastic casing that holds the ear bud on the headphone broke off. I barely pulled it and it broke"
"these little silicon earbuds are starting to just split a little bit"
2. Cord Durability
Product Defect · Critical · 3.5% of buyers
Cords are thin and lack resilience, leading to fraying, detachment, or failure under stress or sweat exposure.
"these cords are pretty thin so they wouldn't have a whole lot of resilience over time"
"the bit of plastic there is just starting to come away starts sliding down the cord"
3. General Product Longevity
Product Defect · Critical · 3.5% of buyers
Product stops working after a short period, disappointing customers expecting longer lifespan.
"they do stop working after a while"
"I managed to go through about six pairs of earbuds every year"
4. Material Peeling/Degradation
Product Defect · Minor
Material on earbuds or pads peels or degrades quickly, even within warranty period.
"muita reclamação do material descascar ainda na garantia"
"after replacing the original foam-pads with real leather ones, those don't appear to wear at all for a year now"
5. Waterproofing Failure
Product Defect · Minor
Bag fails to keep contents dry, with water leaking in after brief exposure to ocean spray.
"everything in my bag ended up damp to soaked after just an hour on the bay from ocean spray"
6. Missing Volume Control
Missing Feature · Critical · 3.5% of buyers
Headphones lack built-in volume control, forcing users to adjust volume on their device.
"they lack volume control"
What Customers Like
Despite the issues above, the product receives strong positive feedback in these areas:
- Microphone Quality: Microphone quality is excellent for calls and voice commands.
- Battery Life and Ruggedness: Competitor (Shockz) praised for long battery life and ruggedness.
- Foam Pad Durability: Real leather foam pads last much longer than original pads.
Market Position
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Full analysis available
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About this analysis
This report was generated by Sellyze using stratified review sampling and weighted prevalence estimation. Reviews were analyzed from a stratified sample that oversamples negative reviews for better problem detection. Prevalence rates are weighted against the actual rating distribution to estimate true buyer impact. All customer quotes are taken directly from published Amazon reviews.