battery voltages & charge

ginger-air · 04-15-2011, 03:45 PM

I have a 2500 mAh lipo and a 3000 mAh lipo, how much charge should they be taking (in mAh) after a flight a what's a safe voltage to drop to?

Deet · 04-15-2011, 05:24 PM

you want to stick to less than 80% of the capacity of a lipo

so on the 2500, stay below 2000

on the 3000, stay below 2400

What you want to do is time a few flights and see what you draw from a pack in that time, then you can work out a safe max flight time for the packs you have.

You dont want to drop below 3.3Volts per cell, but you cant measure that in flight.

stew70 · 04-15-2011, 05:24 PM

you dont want to go any lower than 80%

so on the 3000 thats 2400mah back in
and on the 2500 its 2000mah back.

stewart

Larry227 · 04-15-2011, 07:21 PM

To do the 80% rule calculation take any battery size and multiply by 0.8

ie; 3000 x 0.8 = 2400

04-15-2011, 03:45 PM	#1
ginger-air Registered Users Join Date: Feb 2010 Location: UK	battery voltages & charge I have a 2500 mAh lipo and a 3000 mAh lipo, how much charge should they be taking (in mAh) after a flight a what's a safe voltage to drop to? __________________ T-rex 500 ESP 3G Blade 400 Blade MSR

04-15-2011, 05:24 PM	#2
Deet Registered Users My HF Map location Join Date: Dec 2009 Location: South Australia	you want to stick to less than 80% of the capacity of a lipo so on the 2500, stay below 2000 on the 3000, stay below 2400 What you want to do is time a few flights and see what you draw from a pack in that time, then you can work out a safe max flight time for the packs you have. You dont want to drop below 3.3Volts per cell, but you cant measure that in flight. __________________ Dave Goblin 500, Vbar, BLS153, BLS251, Kontronic Jive & Piro MutliWiiCopter Scarab Stealth Armour, Scarab TriiKopta, Scarab Octa, Scarab Vampire

04-15-2011, 07:21 PM	#4
Larry227 Registered Users My HF Map location Join Date: Jul 2008 Location: Creston, BC (Canada) Porthill, Idaho (US)	To do the 80% rule calculation take any battery size and multiply by 0.8 ie; 3000 x 0.8 = 2400 __________________ Compass 6HV - SK540 - MKS HBL665/669 Trex 500 ESP - SK540 - 510's/BLS251 DX8 / Phoenix / Persistence ~"See the heli, fly the heli"~

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04-15-2011, 05:24 PM	#3
stew70 Registered Users Join Date: Jul 2010 Location: Brisbane Australia	you dont want to go any lower than 80% so on the 3000 thats 2400mah back in and on the 2500 its 2000mah back. stewart