Test / Review: 18650 Solarforce 2400 mAh Battery

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benckie
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Test / Review: 18650 Solarforce 2400 mAh Battery

last night i tested a pair of solarforce 2400 mAh batteries discharged to 3 volt and recharged at 0.5 amp

Cell A (internal resistance 98 milliohms)

 2240 mAh

Cell B (internal resistance 99 milliohms)

2212 mAh

A quick description of the above tables

Zenit [s] is time of the charge, it is updated every 2 seconds.

Input [V] is how much volts my power supply is giving my Ichager 106B+

Voltage accu [V] is battery voltage

Current [A] is how many amps the charger is charging or discharging the battery or batteries.

Capacity [mAh] is how long the battery will last under load. A 2200 mAh battery should be able to give 2.2 amps for one hour till empty.

I would not worry about the other ones on the table's and this is the simplified description.

These solarforce batteries are very closely matched but tested about 200 to 300 mAh lower then the new trustfire flames i tested here on post number 75.

Edited by: sb56637 on 08/26/2014 - 17:47
jacktheclipper
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Cool . I like the performance of my Solarforce batts .

What I do

 

benckie
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Sofar im liking the Trustfire flames for buck VS buck and run time. The flames hold more mAh (= more run time) and are $5.11 USD cheaper a pair. But the solarforce batteries are good and well matched and im happy with my purchase.

benckie
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a link to my redilast 2600 mAh battery test

http://budgetlightforum.com/node/5854

a link to my trustfire flame 2400 mAh battery test

http://budgetlightforum.com/node/5230

a link to my hi-max 2600 mAh battery test.

http://budgetlightforum.com/node/5919

Jinx
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How are you getting the internal resistance?

benckie
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I use an Icharger 106B+ it gives the intetnal resistance

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Interesting, I have access to a dedicated tester for this measurement, might have to try it out on the 18650s I have...

benckie
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The internal resistance (IR) affects how much current a battery can give, how much current it can take and the end voltage of the cell after recharge and the life of the cell, it also makes a diffrence when used in multi cell setups.

I find it interesting but my remote controll Li-po batteries are just about worn out when they have the IR of 16 milliohms per cell but they deal in much larger discharate rates and charge rates then these 18650's.

Sofar the best matched cells with the lowest IR has been the Redilast 2600 mAh (Panisonic cells) but I still have a couple more brands to test yet.

Sofar the best bang for buck mAh wise is the trustfire flames I tested (see above link post number 3) but I'll start a new thread and do some high amp discharge test once all the cells are here.

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benckie -

Thanks for all the great work you're doing with the batteries.  It must be a lot of trouble but it is appreciated.

 

Foy

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benckie
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Thanks Foy

I will have to do a high amp draw test as that's where the "proof" is so to speak.

benckie
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Tail Cap Current Draw Comparisons Of My P60 Drop-in

solarforce 2400 mAh (A) 1.67 amps

solarforce 2400 mAh (B) 1.67 amps

Ultrafire (grey) 2400 mAh (A) 1.23 amps (from buyincoins they only take 900 mAh)

Ultrafire (grey) 2400 mAh (B) 0.7 amps (from buyincoins they only take 900 mAh)

Trustfire Flames 2400 mAh (A) 1.51 amps

Trustfire Flames 2400 mAh (B) 1.50 amps

Redilast 2600 mAh (A) 1.70 amps

Redilast 2600 mAh (B) 1.71 amps

Hi-max 2600 mAh (A) 1.44 amps

Hi-max 2600 mAh (B) 1.45 amps

Panasonic NCR18650A (A) 1.69 amps

Panasonic NCR18650A (A) 1.72 amps

This is for comparison only generaly cells that have the lower internal resistance have the highest current draw. But bad cells can also read high due to high internal resistance and or bad voltage drop ive found.

benckie
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3 amp discharge test from fully charged

Cell A

2085 mAh

Cell B

2107 mAh

benckie
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If people are wondering how i come up with the above data table'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 recalibrated the charger.

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 instead of graphs becuse 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, engery, mAh, plus induvidual cell voltage for upto 6 cells, internal temp of my charger, battery temperture, the chargers imput voltage from the power supply and so on and i can not get all that infomation on one graph.

I usualy only include the end of the charge cycle then hit the print screan button on the key board while the logVeiw program is running and opean on the screan of my computer, save the image in paint, then crop the image down with microsoft picture it! then up load the image to photobucket then post the image on the thread.

I cut out things like battery and charger tempture and induvidual cell voltage if im only doing one cell at a time to test.

benckie
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I'm open for suggestions for other tests on these batteries if there is any intrest ?