parallel charging mSR/mQX/mCPX
The last batch of the items I bought during black friday has finally arrived. A charger, power supply, and a fire proof lipo bag. My new Hyperion batteries and charging leads have been waiting patiently while the charger sits in customs for 2 weeks. Now I can charge multiple batteries for the mQX, mCPX, and mSR. Just like everything else about this hobby, you can really go down the rabbit hole if you choose. Here's a setup that works for me and my layman's summary of it. * [charger](http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=7028) * [power supply](http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=20968) * [charging harness for mQX(JST)](http://www.progressiverc.com/parallel-6x-jst-charge-cable.html) * [charging harness for mCPX(JST-PHR-2)](http://www.progressiverc.com/parallel-jst-phr-2-charge.html) * [charging harness for mSR(Pico)](http://www.progressiverc.com/parallel-6x-pico-charge-cable.html) The same voltage is applied to each element of a parallel circuit, and all these batteries are single cell, the value 1S 3.7V will never change. the only setting that will change is the amps. To find what amp to use, a charge rate needs to be decided. A charge rate of 1C means all the juice in a battery will be filled or drained in 1 hour, 2C means 2 batteries (or 1 in half the time). The Hyperion batteries I got says to never exceed charge rate of 6C, to be safe I choose 2C. Add up the capacity of all the batteries, multiplied by the charge rate, divide by 1000 (unit conversion) to find the current. Lets say I have 4 550mAh and a 500mAh batteries to charge. (550mAh + 550mAh + 550mAh + 550mAh + 500mAh) * 2C * 1A/1000mA = 5.4A I would use 5.4A to charge these batteries, and they will be done in 30 minutes. However, before plugging them all in, make sure the voltage between them is about the same because current will flow from the higher voltage battery to the low. 10% seems to be a good rule of thumb, so they should all be within 0.05v of each other.
