Author: John Muchow

This Golisi cell performed a lot better than the iJoy 40A 3750mAh 21700, especially at higher current levels, but it is overrated.

I haven’t compared its performance directly against the popular 20700’s and 20650’s but will be doing a shootout with all of them soon. I don’t know which cell Golisi is wrapping for this 21700.

This Golisi is badly overrated at 40A but is a true 30A cell, running just slightly hotter than the average of other cells at their rating. This can be handled by just rating it at 29A but this cell is within the acceptable temperature range for a 30A rating.

The wrap says “IMR 21700” but I’m pretty sure this cell doesn’t use the chemistry associated with the IMR model number prefix.

This cell delivered 3714mAh and 3822mAh in my capacity tests. Since the rating must be lower than what any cell delivers it’s not quite a 3750mAh cell.

I am rating this Golisi S35 at 30A and 3700mAh.

Two cells were donated for the purposes of testing by Golisi (www.golisi.com). Thank you!

Cell photos: https://imgur.com/a/OZdiB

Ratings graphic: https://imgur.com/a/yRTTS

Test results, discharge graph, photos: http://bit.ly/2k0rfOF

All my test results to date: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/

This Eizfan cell is identical in appearance in performance to the 10A Samsung 48G.

Yi Fang Technology Co., you have lost your minds rating this cell at 40A. Vapers and vendors, there is no reason to support a company that has this little respect for our community or concern for our safety. Do not buy this cell.

I am rating this Eizfan at 10A and 4800mAh.

Two cells were purchased by me for the purposes of testing.

Cell photos: https://imgur.com/a/Mz71Z

Ratings graphic: https://imgur.com/a/TjVw8

Test results, discharge graph, photos: https://www.e-cigarette-forum.com/threads/bench-test-results-eizfan-40a-4800mah-21700…irresponsibly-overrated-just-a-samsung-48g-do-not-buy.837985/

All my test results to date: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/

This Eizfan cell is identical in appearance in performance to the 15A Sanyo NCR20700B.

This cell has a truly ridiculous current rating of 30A and has an overrated capacity rating too. There is no reason to buy this cell if you have access to the Sanyo NCR20700B.

I am rating this Eizfan at 15A and 4000mAh.

Two cells were purchased by me for the purposes of testing.

Cell photos: https://imgur.com/a/S63Wv

Ratings graphic: https://imgur.com/a/MFjVk

Test results, discharge graph, photos: https://www.e-cigarette-forum.com/threads/bench-test-results-eizfan-30a-4300mah-20700…obscenely-overrated-just-a-sanyo-ncr20700b.837877/

All my test results to date: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/

This cell’s capacity down to 2.5V is quite a bit lower than the claimed 5000mAh. I measured it at 4775mAh and 4873mAh for the two cells I tested. It seems that there is some cell-to-cell variation. Since the rating should be a guaranteed minimum the rating should be lower than what any cell delivers.

But this Vapcell still runs for about 8% longer than the 4800mAh Samsung 48G when pulsed down to 3.2V at 20A. Their performance is very similar but the cell Vapcell uses holds its voltage up a bit better and that results in a bit more run time.

While similar in appearance and ratings to the Samsung 48G I think this is a different cell. I’ll know more in a couple of weeks.

It runs cool at 10A continuous though. I am rating this Vapcell at 10A and 4750mAh. This is a cell for low power vaping so its very long run time can be effectively used without getting early low/weak battery alerts from the mod.

Unfortunately, this cell has Vapcell’s usual paper top insulating ring so juice spills could damage the ring. Be careful.

Two cells from Vapcell were donated for the purposes of testing. Thank you!

Cell photos: https://imgur.com/a/D8EQp

Ratings graphic: https://imgur.com/a/nalxk

Test results, discharge graph, photos: https://www.e-cigarette-forum.com/threads/bench-test-results-vapcell-purple-10a-5000mah-21700…15a-but-overrated-mah-runs-longer-than-samsung.837717/

All my test results to date: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/

This Vapcell appears and performs identical to the great performing Sanyo NCR20650A.

The Sanyo NCR20650A has a “rated” capacity of 2900mAh, a “minimum” capacity of 2950mAh, and a “typical” rating of 3100mAh. So while I always try to use just the rated capacity for a rewrapped cell for my ratings, 2900mAh in this case, Vapcell’s rating of 3000mAh can still be considered accurate. It all depends on which rating you use.

I am rating this Vapcell at 30A and 2900mAh.

Unfortunately, this cell has Vapcell’s usual paper top insulating ring so juice spills could damage the ring. Be careful.

Two cells from Vapcell were donated for the purposes of testing. Thank you!

Cell photos: https://imgur.com/a/RrVGn

Ratings graphic: https://imgur.com/a/dvqhe

Test results, discharge graph, photos: http://bit.ly/2ASxBUr

All my test results to date: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/

This Vapcell is identical in performance and appearance to the great performing (for low power vapers) Samsung 48G cell. Samsung rates this cell at 9.6A continuous.

Vapcell, why rate it at 20A continuous? It becomes hot enough to boil water at that level and the voltage sag is huge. Simply inexcusable.

I am rating this Vapcell at 10A and 4800mAh.

Unfortunately, this cell has Vapcell’s usual paper top insulating ring so juice spills could damage the ring. Be careful.

After seeing the first posts of these test results Vapcell informed me that they will be changing the continuous current rating to 10A and switching to a plastic top insulating ring. They said they will send me the updated cells for testing then. If this happens I will post the new test results.

I expressed my anger that this was only happening after being caught exaggerating the rating so badly. But, it is a positive step and one that many other companies would not take. In the end, what is important is that we have our cells accurately marked.

Two cells from Vapcell were donated for the purposes of testing. Thank you!

Cell photos: https://imgur.com/a/TRF2I

Ratings graphic: https://imgur.com/a/gmqkD

Test results, discharge graph, photos: http://bit.ly/2iRLRo6

All my test results to date: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/

This Vapcell is identical in performance and appearance to the incredible Sanyo NCR20700A cell. That Sanyo is the best performing 20700 I’ve tested so far (as of November 12, 2017).

I do not know how many of these cells Vapcell has or who is selling them right now. I have no doubt that several vendors will be trying to stock them as soon as possible though. Check with your favorite vendors or Vapcell via their web site (http://www.vapcelltech.com) or Facebook page.

The Sanyo NCR20700A has a “rated” capacity of 3100mAh, a “minimum” capacity of 3150mAh, and a “typical” rating of 3300mAh. So while I always try to use just the rated capacity for a rewrapped cell for my ratings, 3100mAh in this case, Vapcell’s rating of 3200mAh can still be considered accurate. It all depends on which rating you use.

I am rating this Vapcell at 30A and 3100mAh.

Unfortunately, this cell has Vapcell’s usual paper top insulating ring so juice spills could damage the ring. Be careful.

Two cells from Vapcell were donated for the purposes of testing. Thank you! I know that some of you will think these are cherry-picked cells but they test identical to the Sanyo’s. No cherry- picking is possible here.

As with any rewrapped cell it can be changed in the future by the rewrapper. But all of the high performance rewrapped cells are retested by me using cells purchased from a vendor. If they are changed the community will be told about it.

Cell photos: https://imgur.com/a/CDcDQ

Ratings graphic: https://imgur.com/a/SlsPq

Test results, discharge graph, photos: https://www.e-cigarette-forum.com/threads/bench-test-results-vapcell-gold-30a-3200mah-20700…accurately-rated-a-sanyo-ncr20700a-rewrap.837069/

All my test results to date: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/

This is a poor performing 21700 cell with a preposterous 40A rating. It appears almost identical to the Basen 30A 4000mAh 21700 but performs a bit worse than the Basen.

Its 40A rating can’t even be considered a “pulse” or “max” rating as it drops to under 3.2V for the first pulse, freshly charged. This is clearly not a 40A cell.

It performs worse than the iJoy 40A 3750mAh 21700. The CoilArt’s greater voltage sag results in at least 30% less vaping time at moderate to high current levels.

Its capacity falls short of 4000mAh in my testing. Since I’m sure I don’t have the worst performing examples of this cell out there I have to assume that others will test even a bit lower.

I am rating this cell at 20A and 3850mAh. 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 shouldn’t damage the ring.

Two cells from The Cloudy Vapor (www.thecloudyvaper.com) and two from CoilArt were donated for the purposes of testing. Thank you!

Cell photos: https://imgur.com/a/9e0dX

Ratings graphic: https://imgur.com/a/AW6SX

Test results, discharge graph, photos: https://www.e-cigarette-forum.com/forum/threads/bench-test-results-coilart-40a-4000mah-21700…grotesquely-overrated-a-poor-20a-performer.837019/#post-20222177

All my test results to date: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/

This is a 21700 cell. It’s continuous 30A rating is ridiculous as it gets hot enough to boil water when discharged at that level. It is just a 20A cell that performs worse than the iJoy 21700 at moderate to higher power levels.

This Basen uses a new cell that has come to market recently. I don’t know who makes it but it’s being rewrapped by at least three different companies so far. I will be posting the results of their testing soon.

It’s capacity falls a bit short of 4000mAh in my testing. Since I’m sure I don’t have the worst performing two examples of this cell out there I have to assume that others will test even a bit lower.

I am rating this cell at 20A and 3900mAh. 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 purchased by me for the purposes of testing.

Cell photos: https://imgur.com/a/ntCiX

Ratings graphic: https://imgur.com/a/pGnaI

Test results, discharge graph, photos: https://www.e-cigarette-forum.com/forum/threads/bench-test-results-basen-30a-4000mah-21700…ridiculously-overrated-just-an-average-20a-battery.836909/

All my test results to date: https://www.e-cigarette-forum.com/forum/blog-entry/list-of-battery-tests.7436/

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/