charging Amp for 2200mah 3S Lipo

[uniquexme]

what is the best charging amp for normal flight. i usually charge it at 0.8A.

[istandalone]

2200mah lipo can safely be charged up to 2.2 amps. i charge my 2100mah's at 2 amps.

[th3tick]

The best answer is "whatever the manufacturer says". Typically, 1C, which for 2200mAh, as istandalone states, is 2.2A. Some manufacturers say 2C or 3C is allowed, but that's up to them. Even then, I tend to stick to 1C.

What brand are they?

John

[uniquexme]

3E lipos. may i also ask wats the safest lowest voltage that we shd go for lipo? i remember reading somewhere it says 3.8 is the best rite? what would happen if we actually drop it to 3.6 or 3.7?

[helvetic]

3E lipos. may i also ask wats the safest lowest voltage that we shd go for lipo? i remember reading somewhere it says 3.8 is the best rite? what would happen if we actually drop it to 3.6 or 3.7?

It is not only the remaining voltage after discharging, more the capacity taken out of the batterie. The most common rule is to discharge 80% of the capacity, and your batterie will last a long time. Example: 2100mAh batterie, take 1680 mAh out of it, no more.

But your question: You may safely drop to 3.65 Volt / cell, as long as you don't dischage more than 80% of the capacity.

The following batteries (3S) work like this:

Kong Power, 2200 mAh: 80 % rule, 10.9 to 11.1 Volt
Kokam, 2100mAh: 80 % rule, 10.8 to 11.0 Volt
Hyperion Litestorm CL, 2100mAh: 80 % rule, 11.2 to 11.3 Volt

Stephan

[uniquexme]

ok, so u are saying discharging to 80%, but may i ask how do u guys determine when would it reach the 80%? is there anyway to calculate it maybe by minutes? so it the voltage goes down to 3.5V per cells, its still ok?

[Pinecone]

I use 3.3 - 3.4 volts per cell under load as my lipo alarm set point. This works out fairly nicely to 80%.

[uniquexme]

ah thanks pinecone. all these while i stop at 3.8V, keke, i guess i can bring it down to 3.4V/cell then. i wonder 5mins for this lipo would be safe.

[Pinecone]

No, the 3.3 - 3.4 volts per cell is WHILE RUNNING. They are higher once you land and disconnect.

[uniquexme]

i have this plug in voltmeter with LED showing the voltage per cell, i wonder if i can attach to it when i m flying to see the voltage.