I have posted these photos before in other threads here in BLF but since this Fan thing is again hot, I am sharing my mod that will not win a beauty contest yet fulfills my intention and experiment of a quieter fan, cooler operation, virtually no additional cost, and controlled by the charger’s own power for hands-free operation, just like the OEM fan. The fan is a 12vdc, .13A taken salvaged from a busted pc psu.
The fan sucks air from above, drawing fresh air from the atmosphere downward, passing through the batteries and cooling them in the cradle as the air pass through the rails, then go down below to cool the pcb, then exiting through the holes at the bottom of th the casing, all automatically controlled by the charger’s fan requirement as needed.
Note the holes drilled in the charger housing bottom.
The finished product:
For all intents and purposes, the current v2.2 OEM fans are already improved and good enough actually, but hey, we want to mod, don’t we?