This cell is identical in appearance and performance to the 15A 4000mAh Sanyo NCR20700B.
Keeppower uses the “typical” capacity rating of the Sanyo, 4250mAh, for its rating of this cell instead of the Sanyo’s 4000mAh “rated capacity”. Both ratings are accurate. It all just depends on which is more important for that particular application for the cell.
Whenever possible I use the rated capacity so I rate the Sanyo and this Keeppower at 4000mAh.
I’m happy to say its 15A continuous current rating is accurate.
This cell has a completely useless “Max Pulse” rating of 30A though. Without knowing the pulse length, time between pulses, and the criteria used to set the rating (voltage sag? temperature? vaping time?) we can’t compare this rating to one from any other cell. It’s useless.
I am rating this cell at 4000mAh. I recommend staying below about 40W though to prevent excessive voltage sag and reduced vaping time.
This cell has a plastic top insulating ring so juice spills will not damage the ring.
Two cells were donated for the purposes of testing by All Day Vapes (http:www.alldayvapes365.com/). Thank you!
Cell photos: https://imgur.com/a/WzGss
Ratings graphic: https://imgur.com/a/e18vb
Test results, discharge graph, photos: https://www.e-cigarette-forum.com/forum/threads/bench-test-results-keeppower-15a-4250mah-20700…accurately-rated-a-sanyo-ncr20700b.836771/
All my test results to date: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/
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