Bounce some ideas around for using li-po battery packs.

[Matthew Keller]

I am researching Li-Po battery packs and was wondering if say, I take a 7.4v battery pack (2 3.7v cells wired in series) and we're to wire them in parallel, how would that change the Mah and C rating? If at all?

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[BobC]

Wouldn't change the C rating, and most (if not all) of those batts don't have the amperage to drive a decent coil

 

[Chewy-bot]

it would double both the Mah and C rating, but half the voltage. There are a wide number of li-po packs for rc airplanes that will put out much more power than can be used in any coil

 

[bapgood]

Wouldn't change the C rating, and most (if not all) of those batts don't have the amperage to drive a decent coil

This is wrong.

Like Tiki said almost any lipo will work, especially RC lipo's.

To calculate constant amp drain rating of a lipo, divide the mAh by 1000 to get Ah and multiply by the c-rating.

Here is an example.....let's say we have a 2S 2400mAh 20c lipo pack that we are going to rewire in parallel.

2400/1000=2.4 x 20= 48 amps continuous discharge capability

Wired in parallel
2400mAh x 2 = 4800mAh
48 amps x 2 = 96 amps continuous discharge capability.

 

[jacobmckeone]

Wouldn't change the C rating, and most (if not all) of those batts don't have the amperage to drive a decent coil

I'm using a 6,000mAh lipo with a 95C Rating... More amperage than 10 mods could use up.

 

[DrSeuss]

There is nothing wrong with your proposal, the issues associated with multiple cells are all to do with charging.

To charge a 7.4v battery, you need more than 7.4V and alongside that, the cells have to be charged to equal voltages (or else they have a nasty habit of going pop). If you run them in parallel, you'll need to make sure again, that both cells charge equally. In general this is beyond the capabilities of most simple charging circuits, but obviously chargers for this configuration do exist.

There isn't much benefit to converting a 2S cell into a 1S higher mAh cell. And RC lipos have very low internal resistance making it a good power source for high power vaping

 

[DrBeaker]

I use rc li-po batterys all the time in mods not a problem.