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KNPWIEE モバイルバッテリー 大容量 20000mAh 携帯バッテリー スマホ...
More product info From KNPWIEE

Brigade Warning!:
Our algorithm has detected a large amount of suspicious negative reviews. Learn more about Review Brigades.
Amazon Reviews for  KNPWIEE モバイルバッテリー 大容量 20000mAh 携帯バッテリー スマホ 持ち運び充電器【PSE認証済/LCD残量表示/LEDライト付き/2USB出力ポート/鏡面仕上げデザイン】ポータブル充電器 台風/災害/停電事故/旅行/出張/アウトドア/地震防災など必携品 2.1A出力 急速充電 iPhone/iPad/Android各種他対応 (ブラック)
Rating:
95 Ratings
95 Reviews
("Ratings" vs. "Reviews")
92% of potentially unnatural reviews removed (why?)
Adjusted:
View/Edit Adjustment
Jump to Report Card

Report Card

Fail Overall Grade
FAIL Unverified Purchases
FAIL Suspicious Reviewers
FAIL Reviewer Ease
FAIL Overlapping Review History
WARN Rating Trend
WARN Word Count Comparison
PASS Reviewer Participation
PASS Brand Repeats
PASS Deleted Reviews
N/A Phrase Repetition
N/A Incentivized Reviews

Most Trusted Reviews

1/5
軽くても使えない... [Go to full review]
Aug 30, 2019      
100% TRUST
  • Verified Purchaser
  • Critical Reviewer (avg. rating: 2.0)


Least Trusted Reviews

使用して思ったこと... [Go to full review]
Sep 1, 2019      
0% TRUST
  • Unverified Purchaser
  • Overrepresented word count (138 words)
  • Critical Reviewer (avg. rating: 2.7)


Analysis Details

Fail Unverified Purchases

14 of the 95 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 2.4 while the verified purchasers have rated this product an average of 4.9. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.

from unverified purchasers

from verified purchases


2.4
4.9


Unverified purchases may be the result of Kindle Unlimited readers, buyers who didn't pay full price, or reviewers who did not purchase the product at Amazon. Read more about our Unverified Purchases test.

Fail Suspicious Reviewers

One-Hit Wonders


4 of the 95 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 3.0 while the reviewers who have posted more than one review have rated this product an average of 4.6. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.

from one-hit wonders

from reviewers with more than one review


3.0
4.6


Never-Verified Reviewers


10 of the 95 reviewers have never written a verified purchase review. The Never-Verified Reviewers have rated this product an average of 2.9 while the reviewers who have written at least one verified purchase review rated this product an average of 4.7. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.

from never-verified reviewers

from reviewers with at least one verified purchase review


2.9
4.7


Read more about our Suspicious Reviewers test.

Fail Reviewer Ease
The ease score is the average rating for all reviews that a given reviewer submits. The average ease score for reviewers of this product is 4.5, while the average ease score for reviewers in this category is 4.2. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.

4.5 Product's Average Ease Score

4.2 Category's Average Ease Score


4.5
4.2


Read more about our Reviewer Ease test.


Fail Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:

6% also reviewed:
【120時間連続駆動... by AKIKI

Does not include products
from the same brand


29 of the 95 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 5.0 while the reviewers who have a more unique product review history rated this product an average of 4.3. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.

from reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


5.0
4.3


Read more about our Overlapping Review History test.

Warn Rating Trend

  • 8%
  • Created over 2 days

We counted 95 reviews for this product over the span of 366 days, an average of 0.3 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 3 or fewer reviews on any given day.

However, we see the following 2 days exceeding this threshold:In total, we found that 8 reviews were created on just 2 days. Although any days with a larger number of reviews than expected is suspicious, the discrepancy in ratings from reviews created on these high volume days and reviews created on other days isn't significant enough to rule out the possibility of it being due to random chance.

from reviews created on high volume days

from reviews created on normal volume days


5.0
4.5


Read more about our Rating Trend test.

Warn Word Count Comparison
Word counts are approximated for Hanzi and Kanji


  • 84%
  • Have an overrepresented word count

In the graph above, we can see the distribution of review word counts for this product and the expected distribution for this category. We see the following 3 groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 80 reviews (or 84%) are within an overrepresented word count group. This is an excessively high number of reviews in overrepresented word count groups.

from reviews with an overrepresented word count

from reviews with a properly represented word count


4.6
4.3


Read more about our Word Count Comparison test.

Pass Reviewer Participation

  • 0%
  • From reviewers with an overrepresented participation
We didn't find any participation groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Reviewer Participation test.

Pass Brand Repeats

Brand Repeaters

We didn't detect a substantial amount of Brand Repeaters.

Pass Deleted Reviews
  • 0
  • Reviews have been deleted
We have not discovered any deleted reviews for this product.

There are a few limitations to keep in mind regarding the Deleted Reviews test:
  1. We don't have a magic ability to collect every single deleted review; we can only identify reviews as deleted if we collect them on one date and then notice they are no longer visible on a subsequent date.
  2. We have no information on reviews that were never published in the first place.
  3. We also don't know why these reviews were removed. It could be action from the platform, personal decision by the review author, part of an entire account closure, even some data error on our part, etc.
Read more about our Deleted Reviews test.

N/A Phrase Repetition
We have not yet completed optimization for this test for Hanzi or Kanji.

N/A Incentivized Reviews
We have not yet completed optimization for this test for Hanzi or Kanji.