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Old 07-11-2012, 11:01 AM
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Foxy
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Default RE: Battery and charging question

In both cases, allow the charger to automatically cut off when it detects delta peak on the nimh and whatever peak detect system they use for the lipo. If there is no 'fully automatic' peak detect setting on that charger for nimh, you should set it to the capacity of the battery (1800). NimHs are particularly sensitive to being overcharged, they will start to degrade fast if they don't like the charges they are being given. Lipo represents a fire risk if overcharged (but would have to be a LOT overcharged), in any case, overcharging is likely to cause immediate swelling of the lipo, reducing its useful life and potentially causing fitment issues in the car. Don't mess with lipos, especially when they are so effective when used 'normally', there just is no risk/reward ratio to trying to feed them extra, it's all risk, no reward.

Short answer, use fully automatic peak detection (don't think you have a choice ont he lipo program anyway), and don't worry about the number of mAh on the screen, unless it's one day pitifully low, indicating death of the battery.

The video here might help... http://www.hobbypartz.com/thac6smbachw.html as you can see on the lipo charge, the user is not prompted to state the capacity of the battery. Also, ignore the guy when he says not to discharge them below 3.7v per cell, I think he must have been confused, since that's the nominal voltage of a lipo cell. Use 3.0/3.1, or even 3.2v per cell for extra safety, when setting the speed control cutoffs.