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BrianG · 04.20.2010, 11:55 PM

Told you they would need to be on a heatsink. People don't seem to realize how hot 5w of heat really is. I assume the PS case is steel, in which case, does not work well as a heatsink. You can use a simple aluminum U-channel as long as it is in the fan's airlflow somehow, or use some type of finned sink.

As to the % issue, I am not familiar with that charger, so I can't say. If it uses cell voltage to estimate charge level, it will be a rough estimate at best. If it uses capacity and mAh put back in, it has to assume you started with a fully depleted battery. If you stick a 5Ah pack with 1Ah still left in it, it may put 3Ah (60% of 5Ah), but the result would actually be 4Ah.

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BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	04.20.2010, 11:55 PM Told you they would need to be on a heatsink. People don't seem to realize how hot 5w of heat really is. I assume the PS case is steel, in which case, does not work well as a heatsink. You can use a simple aluminum U-channel as long as it is in the fan's airlflow somehow, or use some type of finned sink. As to the % issue, I am not familiar with that charger, so I can't say. If it uses cell voltage to estimate charge level, it will be a rough estimate at best. If it uses capacity and mAh put back in, it has to assume you started with a fully depleted battery. If you stick a 5Ah pack with 1Ah still left in it, it may put 3Ah (60% of 5Ah), but the result would actually be 4Ah.