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HomeAircraftHelicopterMain Discussion › Here's a new one for electric heli's !
10-25-2013 12:35 AM  4 years agoPost 1
ICUR1-2

rrElite Veteran

Ottawa, Ontario

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Charge and discharge characteristics of Li-polymer are identical to other Li-ion systems and do not require a special charger.
found this doing a bit of reading and thought I would ask if this is true.

also read the comments on this page


http://batteryuniversity.com/learn/...bstance_or_hype

spending time, paying attention

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10-25-2013 12:46 AM  4 years agoPost 2
ICUR1-2

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Ottawa, Ontario

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I was hoping this site would be useful

http://batteryuniversity.com/learn/...based_batteries

spending time, paying attention

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10-25-2013 01:06 AM  4 years agoPost 3
Retired2011

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Lee's Summit, MO

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It's a football night...I can't be reading such heavy stuff
I'll get back to you later...

Chet

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10-25-2013 02:58 PM  4 years agoPost 4
Wedge77

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St. Charles Missouri USA

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Old Hippie...

GO CHIEFS!!!!!!!!!!!!

Don't know how long they will hold up this awesome start, but if all go's wel, its mid season and no looking back!!!

JR NEX E8, 12 cell
Goblin 630, 12 cell
Vibe 50N Fbl
Century E640 Fbl, 12 Cell

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10-25-2013 03:52 PM  4 years agoPost 5
Four Stroker

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Atlanta

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Li poly and Li Ion are about the same 3.6~3.7 volts per cell. LiFe is not the same, 3.3 volts. Don't know about Li manganese but they disappeared anyway. On the other hand, A123 says you can charge them up to 4.2 volts ? which nobody actually does since there is not any capacity incease above about 3.6 volts. I have charged them up to 4.2 volts accidentally for the obvious reason. They didn't burn my house down or even spew.

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10-25-2013 04:35 PM  4 years agoPost 6
jason46

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MI

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Interesting that reducing the peak to 4.1v per cell reduces capacity by 10% but increases cycle count as much as two times. Maybe a good practice for receiver packs, or starter packs, where every last mah is not so crucial.

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10-25-2013 04:44 PM  4 years agoPost 7
red_z06

rrProfessor

Dumont, NJ

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Interesting that reducing the peak to 4.1v per cell reduces capacity by 10% but increases cycle count as much as two times. Maybe a good practice for receiver packs, or starter packs, where every last mah is not so crucial.
I set all chargers to lowest setting (typically 4.15v) for charging. I do wish TP chargers had 4.10v setting.

www.JustinJee.com

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10-25-2013 04:45 PM  4 years agoPost 8
Ace Dude

rrProfessor

USA

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Receiver packs and starter packs are inexpensive compared to large high C flight packs. Several pilots I know only charge to 4.15v/cell in an effort to prolong the life of their flight packs.

  

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10-26-2013 12:21 AM  4 years agoPost 9
ICUR1-2

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Ottawa, Ontario

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Man my head still hurts from reading all that info

I was thinking the samething
charging to 4.1 and discharging to 3.7 and then storing them at 50% in the fridge

Thinking of making a fire safe bar fridge

spending time, paying attention

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