My New Tanic Batteries

[skippy]

Hi Everyone,

Just wanted to give you an update on my new Tanic 7350 batteries. Just received them today. Each battery came at exactly 19.0 volts, that’s about a 20-30% charge. I am using my Excel spread sheet to document how many charges I get.

Charged them up and took them out for a flight. It was 29 degrees out and very little wind. Put about 12 min flight on them mostly just flying around and doing a few tumbles. Was very pleased with the power, it is equal to or even a little more than my TP-8000. Could not tell for sure the batteries never got above 88 degrees. After flying checked my Tanic taps and one pack was 3.79 on all taps and the other was 3.78 on all taps.

I will keep everyone informed with my experience. So far very impressed.

[WillJames]

WOW they should really start coming on after a few more cycles if they are anything like the small packs. After about 10 cycles, they should ROCK! :shock:

Are the big Li-Po packs like the small onew we use in foamies? Takes a few cycles for them to really get with it.

[skippy]

Hi Everyone,

Have a rather interesting update on my Tanic packs. As with all of my batteries I check for capacity after a few charges when new. I discharged my new Tanic to 17.00v @ 2amps down to .20amps. Let batteries rest for 1hr and then charge, now comes the interesting part. The Tanic 7350-5s3p took 7559ma of electrons!! My TP 8000 Gen II Lite batteries under the same test took 7840ma of electrons, very interesting. The Tanic holds more than rated capacity and the TP holds less.

Have not had a chance to really but the Tanic’s to the test, the weather in Michigan has been very cold and snowy.

[skippy]

Here's my Excel spread sheet that I use to track all of my battery info.

[skippy]

Mongo,

That would make sense, I've never got over 7870 when doing a capacity check. My Tanic's are getting over the rated capacity and TP is under rated capacity.

[Tabbytabb]

Some manufacturers under rate their capacity for a seemingly higher "C" rating. I am in no way implying that is the case here but I remember some talk of some older Kokam cells that were doing this. Usually a dead give away is the weight per cell.

Tabb

[skippy]

Hi Everyone,

Have an update on my Tanic batteries. About 15 charges on the 7350 and no problems at all. I still have not had to balance with the Tanic taps but have checked after every flight. They have more power than my TP Gen II Lite and run cooler. Depending on your type of flying you will get about 9-12 min of flight.

Also went flying with Bobby from East Coast Tanics last week in Florida. Had my first opportunity to use the Tanic 8800 and WOW!!!! These things ROCK have more power than any battery I’ve used to date. I pushed these things very hard for 7 min, just before I piled in the heli!!!! The stock motor was already at 200 degrees from the huge output of the batteries. No batteries to date have pushed the motor that hard that fast.

[Russ McC]

Skippy,

Check your motor; the rotor probably slipped timing (broke) causing massive power and heat. I have broke several rotors and two produced ballistic power and head RPM and yes 200 degree temps by 6 minuets. When the power and or the heat suddenly goes off the chart you have a problem. Even a very good battery will only hold maybe one additional volt over an average one under load, 1V=about 50 head RMP yes you can tell the difference in power but the motor temp should go down I would think? Check it out and let us know what you find. Oh and yes I have broke the newest Kevlar wrapped rotors also, have one sitting on the table right now that needs to go in. At least when the wrapped rotors break they don’t seem to take out the field windings like the un wrapped ones can, but they don’t last any better :roll:

[skippy]

Hi Russ,

Thanks for the feedback. I have already pulled the motor apart and it looks ok. I won’t know for sure until I get it back in the air and see what the rotor rpm is. The Tanics seem to deliver more power under load than my TP, which is causing the motor to heat up faster (more current).