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View Full Version : Lipo’s Dump in 3min, Heliproz voltage monitor saves the day!


helocat
09-11-2007, 07:08 PM
Lipo’s Dump, Heliproz voltage monitor saves it all!

Same Flight Power ( I think) 2170mh 25C lipos, the two week old one yeiled a solid 8 min flight. Then the brand new one died in about 3+ min? (same type of flying, same charger, balanced with a Blinky) Is there a brake in period for these things? Thank god the on board voltage monitor caught the battery dumping (Thank you Heliproz for recommending that!) and I sat the 450 down a good 60’ away from me. (got lucky she did not tip over, lumpy field) It had 8.78v on the three cell pack right out of the bird, then went up to 9.1v cooling off post flight. It took a charge no problem, also put the Blinky back on that pack.

I have my alarm on the DX7 set for 5 min. Seams like I could set it for 6 min with most of my packs. How do you determine the time?

Is there away to bench test the bats to check their individual performance?
Mark

Finless
09-11-2007, 07:56 PM
You DID charge the pack when you took it out of the package? They are not shipped fully charged!

Yes you should break them in like any pack in my opinion.

Bob

bgjames111
09-12-2007, 09:15 AM
Usually what I do, to determine flight time with a certain pack, is fly it for a short amount of time, usually 4 minutes. then, charge and observe the MaH put back into the pack. If you have used less than 85% of the packs rated capacity, you can increase your flight time. you can find an average by doing some simple math with the mah, and time flown.

helocat
09-12-2007, 01:40 PM
You DID charge the pack when you took it out of the package? They are not shipped fully charged!

Yes you should break them in like any pack in my opinion.

Bob

Man I never saw the batteries and charging fourm! (I need to root around more)

Bob, Yes full change just like the matching pack.

bgjames111, thank you I will explore that. This whole batt. thing is all new to me. I am used to nitro. I must say flying at 6:30 AM in my neighborhood be for leaving for work is fun though!


Thanks for the help guys!

Mark