do li-po's have memory?

[kfc]

do li-po's have a memory? do I need to drain them to the lowest safe voltage (I cant remember what it is) before I charge it, or can I charge it after only half draining it?

KFC

[Skiddz]

No, no memory. No need to discharge to lowest safe voltage. The biggest keys (IMO) to long life with these things is to not discharge below 80% of rated capacity and keep 'em balanced with a cell balancer.

[Danal Estes]

Nope. Set aside all prior battery knowledge. It will frequently get you in trouble with LiPo.

- Charge with a LiPo charger, at 1C (or 2C if you have the special rig).
- Discharge by flying. Limit discharge to about 80% capacity.

That's IT!! Do not cycle, peak, etc, etc. Maybe just one more thing:

- If storing for more than about a month, try to store at 50% charge state.

Really, that's it :mrgreen:

[Pinecone]

Storage should be at 3.8 - 3.85 volts per cell.

TP 1010C and FMA CellPro (A123 version) will do their thing to 3.85 volts per cell if you ask nicely.

[Mercuriell]

- Discharge by flying. Limit discharge to about 80% capacity.


Umm - don't you mean 80% of pack peak voltage (0.8xSx4.2) rather than capacity - 80% of capacity could seriously limit flight times :)

[Pinecone]

Nope, 80% of capacity.

When you charge your 2100 packs, they should finish with less than 1680 put back in.

[Mercuriell]

Gottcha - discharge 80% of capacity (ie to 20%) rather than to 80% of capacity (only use 20%) - wouldn't disagree with that. The AF 109 charger helps remind that as it starts charge at 5S for a 6S pack if overdischarged and the voltage too low.

[spork]

do li-po's have memory?

Mine get awfully nervous when I approach the ground at a high rate of speed - so I'd say probably yes! :mrgreen:

[Pinecone]

:lolol :lol:

[WillJames]

When Li-Po's are new, do about a half flight on them and recharge for the first 5 or 6 flights to get them "broken in" easily and they will last a long time.