First I want to thank speaker_joe for donating the Delta fans, Dale[DB Custom] for splicing the Delta fans with the proper plug and donating his skill and time. Also HKJ who spent several hours with me Three weeks ago in determining whether the Opus Transistor was capable of handling the wattage of the Delta fan.Without their help and input this thread would NOT exist.
One of problems I was having with a few Opus chargers is during discharge cycle w/ 4 X 18650 3400mAh batteries, the charger would have too many stoppages which was one of the causes that gave inaccurate capacity results. The batteries just could not stay cool enough and when that happens the charger automatically stops until they get below 40C/104F.
I know this[STOPPAGES] is mentioned in the manual. I also believe they are a DIRECT result of the inaccuracies of the capacity[mAh] readings. This simple test seems to Verify that.There was no doubt in my mind that a better quality fan would remedy this problem.
This test is with the EXACT same charger using the stock fan VS. my Top Tier Delta fan.Also the EXACT same batteries. That alone makes it pretty easy to come to a conclusion of which fan is better and how each fan affects the Capacity results.
I am testing Three sets of 18650 batteries that were tested within a week of each other,some the same day.
The batteries are: 4 X 30Q BT,4 X KP 18650 3400mAh and 4 X Orbtronic 18650 3400mAh. I have NO plans of using the old fan so these are the only comparison tests that I have.
For the Stock fan tests of the ORBTRONIC and KeepPower I only have written stats.
ALL TESTS ARE DISCHARGED AT 1 Amp.
Specs. for fans: DELTA: 25mm X 25mm X 10mm——————-ADDA:25mm X 25mm X 09mm. The only difference is 1mm in depth.
Stock[ADDA] fan- 5v/0.13a/0.65W
Delta fan- 12V/0.12A/1.44W
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PHOTOS OF FANS
Plug difference: STOCK[Adda] on Left/Delta on right
DELTA Fan after being Professionally spliced by Dale.
Picture I took of the Transistor[1AMH]behind the fan plug that helped HKJ determine if the OPUS was able to handle the wattage of the Delta fan[1.44W]
To my happiness, HKJ Confirmed the Delta fan was safe to use!
HKJ: “It can handle a bit above 2W at 12V”.———————— My Delta is 1.44W at 12V :+1:
The DELTA fan has more depth, no grooves to fit in slot and when the cover is tightened the top protrudes slightly,no biggie,works like a charm!
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TEST: ADDA fan
Batteries: 4 X 30Q BT/10 Cycles
Purchased:3.31.2017
STOPPAGES:NO
Time to Discharge:3H7M
4 slot median:3009mAh
HKJ[1A] Discharge=2884mAh
TEST: DELTA fan
Batteries: 4 X 30Q BT/10 Cycles
Purchased:3.31.2017
STOPPAGES:NO
Time to Discharge:2H54M
4 slot median:2890mAh
HKJ[1A] Discharge=2884mAh
My median is Only 6mAh off of HKJ.
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TEST: ADDA fan
Batteries: 4 X Orbtronic 18650 3400mAh/cycles:465.
Purchased 12.21.2012
STOPPAGES:YES
Time to Discharge:3H35M
4 slot median:2959mAh
HKJ[1A] Discharge=3162mAh w/ NCR18650B Panny cell which the Orbtronic uses. Not exact but an idea
1-3010mAh, 2-2976mAh, 3-2951mAh, 4-2901mAh
TEST: DELTA fan
Batteries: 4 X Orbtronic 18650 3400mAh/cycles:465. Purchased 12.21.2012
STOPPAGES:NO
Time to Discharge:2H54M
4 slot median:2870mAh
HKJ[1A] Discharge=3162mAh w/ NCR18650B Panny cell which the Orbtronic uses. Not exact but an idea.
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TEST: ADDA fan
Batteries: 4 X K’Power 18650 3400mAh/cycles:170
Purchased:1.20.2015
STOPPAGES:YES
Time to Discharge:3H29m
4 slot median:3208mAh
HKJ[1A] Discharge=3211mAh
1-3010mAh, 2-2976mAh, 3-2951mAh, 4-2901mAh
TEST: DELTA fan
Batteries: 4 X K’Power 18650 3400mAh/cycles:170
Purchased:1.20.2015
STOPPAGES:NO
Time to Discharge:3H06m
4 slot median:3087mAh
HKJ[1A] Discharge=3211mAh
All Three of the tests using my Delta fan are closer to specs. than the STOCK fan. For the Keeppower and Orbtronic the age/cycle count must be considered to determine the accuracy of the tests.
The STOCK fan gave higher numbers for ALL Three tests.If you look at the Discharge times, the STOCK[Adda] fan took Longer in all Three tests and its mAh numbers were higher and further away from specs. There seems to be a correlation with that.
I enjoyed doing these simple yet helpful tests. I hope someone else may find this to be of benefit to them.
I am VERY happy with the Delta fans and now its time to celebrate my 57th Birthday w/ friends and family. :partying_face: