Review / Test: Protected Trustfire 26650 5000 mAh Battery from Manafont

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benckie
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Over charger protection test

Data table

A graph showing when the pcb cut off.

Some pictures

The over charge protection works.

 

 

benckie
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I'm going to do a 1 amp discharge test for comparison as there is a lot of people out there that have hobby chargers that can only discharge to a 1 amp and Ive seen a few discharge test at 1 amp, so i thought ill do one for comparison.

After that is there any other test people would like see done on this battery before i pull of the PCB (protection circuit) to see how many mosfets the PCB has and to see if there is any usable information written on the cell ? I do have some more coming so i will do some discharge testing on them as well.

If people are wondering how i come up with the above data table's and graph's i posted on this battery test, i data log using my icharger 106b+ connected to my computer for my battery tests, i use a program logVeiw V2.7.4* with icharger 106B+ with firmware v3.14 upgrade and then re-calibrated the charger's main charge lead's voltage and balancing port voltage.

I use this program for my data log,s and for the data charts i post

http://www.logview.info/vBulletin/content.php?47-screenshots_1

I use the data tables and graphs because i find it simple and think it would be easy for other people to read and the data tables includes charge time updated every 2 seconds, voltage, watts, energy, mAh, plus the data tables include induvidual cell voltage for up to 6 cells, internal temp of my charger, battery temperature, the chargers input voltage from the power supply and so on and i can not get all that information on one graph.

With the data tables i usually only include the end of the charge cycle then hit the print screen button on the key board while the logVeiw program is running and open on the screen of my computer, save the image in paint, then crop the image down with Microsoft picture it! then up load the image to photo bucket then post the image on the thread, the same process for uploading the graphs.

On data tables cut out things like battery and charger temperature and individual cell voltage if I'm only doing one cell at a time to test, data tables are my favorite but the graphs shows how well the cells hang on to there voltage while discharging.

HKJ
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I have also tested this battery, it was the version from DealExtreme.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

benckie
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1 amp discharge test

Start

End

4523 mAh

BetweenRides
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Wow, benckie. That's actually the highest capacity I've seen on a 26650. Have you seen one higher?

benckie
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Time to pull it apart.

I believe this is a genuine trustfire cell, all genuine trustfire lights and batteries i have brought have a TR description or part number on the driver or PCB.

The protection circuit has 2 mosefts witch is good, cheap or knock off clone batteries have one and can not handle 3 amp current draw, i have brought clone trustfire flame 18650,s from DX, ebay with one mosfet that trip under load.

The cell has nothing printed on it no markings or labels what so ever on it.

I have 3 more coming i will test them when they get here to get a broader range of information on these and to see if they all test similar to each other.

benckie
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BetweenRides wrote:

Wow, benckie. That's actually the highest capacity I've seen on a 26650. Have you seen one higher?

No i have not seen higher at 1 amp. I belive with out the protection PCB they will test even higher.

benckie
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I'm running another 1 amp discharge test with out the protection PCB and it looks like its going to pull more then 4513 mAh.

BetweenRides
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Wow. It will be good to see confirmation of capacity when you get the 3 additional cells from Manafont. Now if we can just count on them consistently selling these same ones in the future....

benckie
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If they stay like the trustfire flame 2400 mAh 18650,s ive brought and tested (around 18 or so now just from manafont over the last 9 to 10 months) as they are all around 2400 to 2500 mAh give or take, ill be happy.

benckie
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1 amp discharge test with the battery protection removed.

4567 mAh

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Unprotected at 3A?

I'm wondering about sag under 3A load without protection. Should be much better than protected.

This is my flashlight collection.

benckie
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Thats my next test as i would like to compare the curve and knee with and with out protection on the 3 amp discharge.

benckie
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3 amp discharge test with the protection PCB removed.

4.14 volt to 2.5 volt.

4517 mAh

5 amp discharge test with the protection PCB removed.

4.17 volt to 2.5 volt.

4533 mAh

There is little gain in discharging from 2.75 to 2.5 volt (47 mAh). So i conclude the Maxim discharge for this cell is 2.75 volt.

Unlike other cheap cells Ive tested with the PCB protection removed there is normally more of a gain in mAh, there is basically only a slight gain in mAh with the protection PCB removed and the graphs are basically the same, so i conclude the protection on this cell works well and is efficient for a cheap cell.

Ive also noted there is little to no loss in mAh between charging at 1 amp to 1.5 amps on this cell. I conclude this cell is 100% genuine and for the price VS mAh with the added bonus of the built in PCB protection circuit, i give it the thumb,s up.

It tested better then any other protected 26650 cell Ive seen sofar and better then some other unprotected cell's and matched the king kong's in 1 amp discharge and tested higher then the king kong's in the 3 amp discharge test and the 5 amp discharge test.

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Thanks again, benckie, fantastic review as always. I'm going to update the 26650 thread to make note of this performance.

benckie
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Updated post #44 with a 5 amp discharge test.

nekdo12
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benckie wrote:
It tested better then any other protected 26650 cell Ive seen sofar and better then some other unprotected cell's and matched the king kong's in 1 amp discharge and tested higher then the king kong's in the 3 amp discharge test and the 5 amp discharge test.

But INR King Kong's little better hold voltage. ICR King Kong's hold voltage same as Trustfire.

benckie
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These perform better then my king Kong's even with there protection circuit, but are slightly longer.

nekdo12
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benckie wrote:

These perform better then my king Kong's even with there protection circuit, but are slightly longer.

KK INR At 3A from 4,2V to 3,5V around 2400mAh.

At 5A 1800mAh

10A 800mAh.

KK ICR

3A 1700mAh

5A 1200mAh

Your TF test

3A 1300mAh

6,4A (4,15V-3,5V) under 100mAh.

 

TF have more capacity, but KK better hold voltage

benckie
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If you going from the graph's along you need to take a few things into account.

I used square graphs with smaller spacing for the voltage and mAh so this will show more of a curve and less of a knee to mitro's graphs IMHO.

Mitro use larger spacing in the voltage and mAh and a rectangle graph this will show less of a curve and more of a knee in the graph's then mine IMHO.

I own king kong's ICR's and have ran my own testing, i never posted my results as there has been a lot of testing on these cells and a lot of data already posted, i can say this trustfire performs the same or better between 1 to 5 amps discharging with voltage and mAh.

Also the protection Ad's length and it will drain some power out of the cell while discharging. But at the end of the day the battery with the most capacity (mAh) will give the most run time.

To me these protected trusfire 26650 cells are awesome the test speak for them selfs, the protection worked and they can be used in series with out adding magnets, great for cheap cell IMHO

benckie
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As I've already said in this post I have 3 more coming and last night I ordered 1 more for a friend that is getting sent to me to test before handing it over. So including the cell I've already tested I'll be able to test 5 cell's in total giving a good basis of cell performance from the cells ordered at different times from the same seller. I'll post my results with order and received dates as they get here. Testing 5 cells should give us a good broad test, much better then testing one or two cells.

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Hey Benchie, thanks for recommending these cells.  They arrived today and work great in my Fancyfire HD-2010 and JM07 Pro White. 

Richie

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No problem Richie.

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Date ordered: 04/23/12 Date dispatched: 04/24/12 Date received: 5/17/12

Cell voltage out of bag

Cell #1 3.90 volt

Cell #2 3.87 volt

Cell #3 3.82 volt

Charging now I'm going to charge them at 1.5 amp then discharge to 2.75 volt at 3 amp to mimic the test done on the opening post on this thread.

benckie
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I can confirm again these do work in multi cell lights with out adding magnets or blobs of solder

benckie
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Cell 1 first cycle discharged from 4.15 volt to 2.75 volt @ 3 amp.

 

4119 mAh

I did use the cell for a couple quick tail cap test before discharge, but it is still in the ball park with the king kongs discharged @ 3 amp.

benckie
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Cell 2 first cycle discharged from 4.16 volt to 2.75 volt @ 3 amp.

 

4230 mAh

benckie
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Cell 3 first cycle discharged from 4.16 volt to 2.75 volt @ 3 amp.

4133 mAh

benckie
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I was expecting approx 100 to 200 more mAh from these batteries test, it is there first cycle they will pick up a little after a few more uses and they still are par with the king kongs discharged @ 3 amp. The protection seams to be working on all three cells.

I have one more cell coming ordered after the three i just tested when it gets here ill test it as well and post my results and i might randomly test one of these 3 cells again later to see if it picks up or if charged to 4.2 volt i can get a bit more mAh out of it.

I found this 3 x 26650 battery holder to be handy for storage and could be useful for a charging cradle or custom power supply for DIY projects. i like the fact they lock together.

 

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I has bought two of these from Manafont and including them in my test.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

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