I have three of the chargers. Tried lubing with mixed limited success. I am going to replace the fans. Tired of fooling around with them.
This is the fan I am looking at MC25101V2-000U-A99 from Sunon. They have a variety of versions. One distinguishing factor is it they are designed for 12V PWM or simple linear 12 VDC. I need to pick one.
Yes they cost 1/3 of the cost of the charger.
I salvaged this fan from an old PC power supply, and never been happier!
I did not remove the stock fan, made a new connection to where the original fan’s connector was removed, and it behaves just like the original fan. Goes slow on light loads, revs faster as needed, automatically. Drilled holes at the bottom of the case, the fan sucks air from above, cool air passing through the cells and through the rails, cooling at the same time the pcb below, AND, more quiet.
Discharging 4x1a is a breeze, the cells just lukewarm.
Btw, the fan is .13A, 12vdc. —- but as to your question about pwm or simple linear, I do not know. But it works really, really great.
how many leads on the original?
2 = plain dc
3= plain dc w tach
4= pwm
It’s only two wires (red/black) so it’s plain DC, 12v.
i would flip it over.
no use in fighting convection.
but it likely does not matter as its cfm is much higher than the original.
dont know if it is doing much cooling of the electronics though.i dont have one of these chargers yet.and thus have not tore one down.
it may have a baffle system to ensure airflow over the power sections.
you can still use a tach equipped fan.ignore the yellow lead.its for monitoring only.
whats the original?
these will all be screamers.
the 80mm on the bottom may be the way to go.
i hate noise and the 80 on the bottom should be very quiet.
I believe the manufacturer has 2 2- wire fans. One is DC and one is PWM. That does not seem unreasonable. I would believe the electronics are different.