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STK EN-EL9 EN-EL9a Battery for Nikon D3000, D5000, D40, D60, D40X
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From SterlingTek
This report was last updated 11/21/2020.
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Report Info:
Note: While Amazon.com claims 1,059 Ratings, we counted 869 Reviews available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Pass Overall Grade
FAIL Rating Trend
FAIL Overlapping Review History
WARN Deleted Reviews
WARN Suspicious Reviewers
WARN Reviewer Participation
PASS Unverified Purchases
PASS Word Count Comparison
PASS Phrase Repetition
PASS Reviewer Ease
PASS Brand Repeats
PASS Incentivized Reviews
Most Trusted Reviews
Fit my Nikon perfectly [Go to full review]
Aug 23, 2020
100%
TRUST
TRUST
- Verified Purchaser
- Take-Back Reviewer (1 deleted Review; avg. rating: 5.0)
- Easy Grader (avg. rating: 4.9)
Least Trusted Reviews
Battery fits as claimed. Nice to have a spare battery. [Go to full review]
Jan 4, 2015
0%
TRUST
TRUST
- Unverified Purchaser
- Created on a high volume day
- Overlapping Review History: reviewed 1 of 9 top products
- Overrepresented Participation (posted 16 Reviews)
- Critical Reviewer (avg. rating: 4.2)
Analysis Details
Fail Rating Trend
-
- 7%
- Created over 13 days
We counted 869 reviews for this product over the span of 3,981 days, an average of 0.2 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 13 days exceeding this threshold:In total, we found that 60 reviews were created on just 13 days. The reviews on these high volume days have rated this product an average of 4.8 while reviews from other days 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.
Fail Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
3% also reviewed:
Amazon Basics Wireless Remote Control for Cameras by Amazon Basics
2% also reviewed:
Neewer Battery Charger (Replacement for Nikon... by Neewer
2% also reviewed:
Amazon Store Card by Synchrony Bank
2% also reviewed:
Echo Dot (2nd Generation) - Smart speaker with... by Amazon
2% also reviewed:
STK EN-EL9 Charger for Nikon D3000, D5000, D40,... by
1% also reviewed:
The Man In The High Castle - Season 1 (4K UHD) by Alexa Davalos
1% also reviewed:
TiffenUV Protection Filter by Tiffen
1% also reviewed:
SanDisk Ultra 32GB UHS-I/Class 10 Micro SDHC... by SanDisk
111 of the 869 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.8 while the reviewers who have a more unique product review history 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.
Warn Deleted Reviews
We discovered a total of 26 deleted Reviews for this product, with an average rating of 4.8. 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.
There are a few limitations to keep in mind regarding the Deleted Reviews test:
- 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.
- We have no information on reviews that were never published in the first place.
- 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.
Warn Suspicious Reviewers
Take-Back Reviewers
312 of the 869 reviewers have had at least one of their past reviews for another product deleted. While this is more Take-Back Reviewers than we'd expect to see, the discrepancy in ratings between the Take-Back Reviewers and reviewers who don't have any deleted reviews in their history isn't significant enough to rule out the possibility of it being due to random chance.
Warn Reviewer Participation
-
- 56%
- From reviewers with an overrepresented participation
We see the following 2 participation groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 487 reviewers (or 56%) are within an overrepresented participation group. This is an excessively high number of reviewers in overrepresented participation groups.
Pass Unverified Purchases
32 of the 869 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.
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.
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:
Show MoreShow Less
16 reviews
(3.9/5)
(3.9/5)
9 reviews
(4.1/5)
(4.1/5)
7 reviews
(4.4/5)
(4.4/5)
11 reviews
(4.2/5)
(4.2/5)
28 of the 869 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.
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 4.4, while the average ease score for reviewers in this category is 4.3. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.
4.4 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass Brand Repeats
Brand Repeaters
4 of the 869 reviewers have reviewed other products for this brand. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
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.
-
- 0%
- Admitted to receiving an incentive
We didn't detect any reviews that used language indicating they were incentivized.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.