New to these. Have them in a plane I bought. A Chip Hyde Vision 3D.
2S/2P 5400 mah Lithium Ion.
Is it safe to say that I can charge it at the 1C rate of 5.4 amps and be OK?
Also have a Quattro 1-4 cell LIPO charger. Can I charge Lithium Ion batteries with a LIPO charger? Looks like the same logic ie cutoff charge of 4.2V per cell.

2S/2P means you have 2 cells in series, 2 in parallel. This makes each of the cell to be 2700mah. So 5.4 amps would be too high. Try at 2000mah (2amp) charge (7.4v or 2cell). Your charger should specify if it can handle Lithium Ion (most do).

So you based the 1C rate on the series of batteries voltage and not the total voltage of the four batteries in this case?

In series you add the voltage and look at a series battery as a single battery, so a two cell pack is a 7.4 volt battery and thats how the charger sees it. If they are 2000 mah cells then the charger sees a single 7.4 volt 2000 mah pack.

In parallel the voltage stays the same, you add up the capacity, so 2 2000 mah batteries in parallel is seen as a 3.7 volt single battery of 4000 mah capacity.


So a 2s2p in my example above, you add up the voltage on the series, you get 7.4, you add up the capacity of the parallel bats and get a 7.4 volt 4000mah pack, which is how a charger sees it (unless we are talking a balancing charger that sees each sell individually but thats usually just lipo packs)