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AmazonBasics High Capacity Ni-MH Pre-Charged Rechargeable Batteries, 500 cycles From AmazonBasics Report Feedback

Pass Reviews appear natural

Original:

2,915 Reviews

Adjusted:

2,071 Reviews

Rank in: AA
57%
60%

View/Edit Adjustment
How is this calculated
Last Updated: 2/18/2017
Update Available
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Report Card

Click a test to jump to details

FAIL Suspicious Reviewers
FAIL Overlapping Review History
FAIL Skewed Helpfulness
WARN Deleted Reviews
WARN Brand Repeats
PASS Rating Trend
PASS Unverified Purchases
PASS Word Count Comparison
PASS Phrase Repetition
PASS Reviewer Participation
PASS Reviewer Ease
PASS Incentivized Reviews

Most Trusted Reviews

Last bought these batteries in 2014 so they have lasted ... [Go to full review]
Nov 18, 2016      
100% TRUST
  • Unverified Purchaser
  • Easy Grader (avg. rating: 4.5)


Least Trusted Reviews

Jul 18, 2016      
0% TRUST
  • Verified Purchaser
  • Created on a high volume day
  • One-Hit Wonder
  • Take-Back Reviewer (1 deleted review; avg. rating: 5.0)
  • Easy Grader (avg. rating: 5.0)


Analysis Details

Note: While Amazon claims 2,915 reviews, we counted 2,589 available on their site.

Fail Suspicious Reviewers

One-Hit Wonders


54 of the 2,589 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 3.6 while the reviewers who have posted more than one review have rated this product an average of 4.5. 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


3.6
4.5


Take-Back Reviewers


1,103 of the 2,589 reviewers have had at least one of their past reviews for another product deleted. The Take-Back Reviewers have rated this product an average of 4.6 while the reviewers who don't have any deleted reviews in their history have 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 take-back reviewers

from reviewers without previously deleted reviews


4.6
4.3


Single-Day Reviewers


159 of the 2,589 reviewers have written multiple reviews but posted all of them on a single day. The Single-Day reviewers have rated this product an average of 4.7 while all other reviewers rated this product an average of 4.4. 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 single-day reviewers

from non-single-day reviewers


4.7
4.4


Read more about our Suspicious Reviewers test.

Fail Overlapping Review History

2% also reviewed:
Amazon Echo by Amazon

2% also reviewed:
Samsung 850 EVO Parent by Samsung

Does not include products
from the same brand


578 of the 2,589 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.6 while the reviewers who have a more unique product review history rated this product an average of 4.4. 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


4.6
4.4


Read more about our Overlapping Review History test.

Fail Skewed Helpfulness
We examined the average net helpfulness score of negative reviews against the average net helpfulness score of positive reviews. The net helpfulness score is the number of times a review has been marked as helpful minus the number of times a review has been marked as unhelpful. We found that the negative reviews had an average net helpfulness score of -0.6 while the positive reviews had an average net helpfulness score of 0.0. Based on our statistical modeling, this discrepancy is significant enough to believe that the difference is not due to random chance, but possibly due to influence of unnatural voting patterns.

Example critical reviews

0.0 average net helpfulness for positive reviews

-0.6 average net helpfulness for negative reviews


Read more about our Skewed Helpfulness test.


Warn Deleted Reviews

We discovered a total of 47 deleted reviews for this product, with an average rating of 4.4. Even though deleted reviews don't affect the average rating, the fact that action was taken to delete reviews raises some red flags about the integrity of the reviews for the product as whole.

4.4 average rating of deleted reviews

4.4



Read more about our Deleted Reviews test.

Warn Brand Repeats

Brand Repeaters


871 of the 2,589 reviewers have reviewed other products for this brand. While this is more Brand Repeaters than we'd expect to see, the discrepancy in ratings between the Brand Repeaters and non-repeaters isn't significant enough to rule out the possibility of it being due to random chance.

from Brand Repeaters

from Non-Repeaters


4.6
4.3


Read more about our Brand Repeats test.

Pass Rating Trend

  • 2%
  • Created over 4 days

We counted 2,589 reviews for this product over the span of 937 days, an average of 2.8 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 10 or fewer reviews on any given day.

However, we see the following 4 days exceeding this threshold:In total, we found that 44 reviews were created on just 4 days. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from reviews created on high volume days

from reviews created on normal volume days


4.4
4.4


Read more about our Rating Trend test.

Pass Unverified Purchases

83 of the 2,589 total reviews for this product are unverified purchases. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from unverified purchasers

from verified purchases


4.1
4.5


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.

Pass Word Count Comparison

  • 0%
  • Have an overrepresented word count
We didn't find any review word count groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Word Count Comparison test.

Pass Phrase Repetition
Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.

Common Phrases in Reviews:
73 reviews
(2.8%)
35 reviews
(1.4%)
Common Phrases in Titles:
44 reviews
(1.7%)
26 reviews
(1.0%)


57 of the 2,589 total reviews for this product use substantial repetitive phrases between them. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from reviews with substantial repetitive phrases

from reviews without substantial repetitive phrases


4.3
4.4


Read more about our Phrase Repetition 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 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 4.3, while the average ease score for reviewers in this category is 4.4.

4.3 Product's Average Ease Score

4.4 Category's Average Ease Score


4.3
4.4


Read more about our Reviewer Ease test.


Pass Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.


2 of the 2,589 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from incentivized reviews

from non-incentivized reviews


5.0
4.4


Read more about our Incentivized Reviews test, or check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.