LiPo battery charging

[craig911]

not sure if this is the correct place, i couldn't see a battery/charging section

so i have built my helicopter just waiting on a few more parts so while waiting i have been programing my controller

now i receved my battery and charger today
the charger is a Turnigy Accucel-6 80W 10A Balancer/Charger LiHV Capable
battery is Flightmax 2200mAh 3S1P 25C
i also have a 30C 2200mah HI-Energy Extreme battery that came with the helicopter it came with two but one was puffed up so i ditched that one,

i set the charger to stop charging at 2200MAH and 12.6V voltage cutoff and 180min cut off timer
I'm balance charging at 1amp

the used pack i have not charged yet, my charger also has a resistance checker etc what current would you recommend charging the used pack at, i was thinking 500mah or less until its been cycled a few times

just looking for some input as I'm more of a nitro guy and this is my first time using lipos,

I'm thinking of storing them individually in some rubber lined tines with some vent holes if they were to fail

 

[hamz9561]

You can actually charge the battery at its rated capacity (2200 mA). This is 1C and is considered safe for most if not all of the LiPo batteries that I know of and it's how I charge/balance-charge all of mine. This will also allow you to charge them in about an hour.

Some of the people that I know store their LiPos in metal ammo cans purchased at a store. Another good idea is a LiPo charging bag.

 

[craig911]

thanks for the info, i have been looking at ammo cans,

I'm limited to around 1.2AMP for charging as my dc adapter only puts out 12V 1.2amp so for now i will keep the charger set to 1amp

i got a question about battery resistance, the used battery is showing cell this for the cells 011Ω 010Ω 023Ω, it balanced charged fine at 500mah, chose that to be safe, since it was a used pack.

what numbers should i be on the lookout for when it comes down to before recycling(disposal) the battery

i haven't checked the new battery yet but again charged fine at 1000mah

 

[hamz9561]

I'm not sure of the impedance or resistance of the packs, but I bet that there is somebody here that knows. I usually toss them after a saltwater bath when they are are either puffed or give an error on my charger.

 

[Greywolf74]

Theres no set ohm level where you say ok this pack is trashed but it you start getting up in to the 300+ range You'll likely start noticing the pack not lasting as long as it should so its really up to you to determine when the pack isnt worth using anymore. The resistance checking feature is more of a tool that you can use to just kinda keep tabs on how the cells are doing, if the lipo was in a wreck you can check to see how much, if any, damage was done to the cells, or if a battery is working right and you check it and see one of the cells has a way higher resistance than the others you know you lipo has a cell going bad in it. That kind of thing. hope that helps.

 

[craig911]

i had two packs that came with my helicopter, i kept one thats the one i charged at 500mah the other was puffed up so i didn't even chance it put it in the recycling box when i got home with everything

i also found the manual for my esc and programed it for soft start and turned off the brake but I'm going to change it to a 45Amp one as the 25amp one i have now gets quite warm with the motor around 25% its a castle creations phoenix 25 amp esc

this is the one I'm going to get Turnigy AE-45A Brushless ESC going to order it after christmas,

 

[Greywolf74]

I would not swap out a Castle creations ESC for a turnigy one personally. Its kinda like replacing real wood with particle board, sure it will get the job done but its a cheaper substitute.

 

[craig911]

its just it was getting quite hot with light use,basicly just spoiling the helicopter blades to set the tracking it was getting hot, and i had it located in the down draft

i got the Turnigy AE-45A Brushless ESC, it doesn't even get warm already programed it for soft start and 3s lipo,

just got to find my low voltage alarm, i keep putting it down then can't find it after