What Batteries are you using now?

[FMJB]

I have 2 eflite stockers and two DN Power batteries and all 4 are pretty much dead now.
Sense I got my B400 I have not flown the CX2 much, but now that winter is coming I want to get some new batts so I can fly the CX2 insid eduring bad weather days...so I was wondering what you guys are using these days.

I don't mind paying a good price for a good batt.

Thanks for any replies

[Heli Guy]

I've had 2 E-flite batteries die on me now, so I've started using Common Sense RC (7.4v - 800mAh 8C).

I've purchased 3 in total and they are very good in my opinion. Not much thicker than the stock batteries. They do fit well enough, plus they have extra length on the wires.

[benzee1]

I have 2 common sense batts, an eflight and a DN. I like the DN best because it's rated 900mAh and 15c. I get a little more power from it .vs the others. I won't buy an eflight battery. It's my weakest battery and I get shorter flight times with it. I bought the common sense a week after I got the heli and they imediately outlasted the eflight batt.

Get Common Sense at LHS or try these:
http://www.boomtownhobbies.com/DN_Power_Tenergy_900mAH_CX2_Battery_Pack_p/dn900cx.htm
http://www.boomtownhobbies.com/DN_Power_Tenergy_900mAH_25C_CX2_Battery_Pack_Ne_p/dn900cx-25.htm

[jhgamer808]

Well, let's see...I've got 2 stock e-flites,2 Kong Power 900mAh 15Cs, and 4 Tenergys (2 900/10C and 2 900/25C). I like both of the aftermarket brands. They both provide a lot more power and a large increase in flight times! :thumbup:

[railroad11]

well fmjb i use the dn over 900 amh lipo battery and the one i got is shot i need to get a new one for me cx heli . yes winter is a coming. and i have to fly my cx heli inside as well.so how lomg have you been flying your cx heli? how many helis do you own? i allso race r/c trucks as well. so that keeps me going doing the winter months.i have a model train i do that in the winter.

[jfrock25]

I like the MegaPower 15C 850mah from Helidirect. About the same as DN except my DN battery puffed on me after a month and the MegaPowers I have used forever and still work great.

That is if I ever get my heli working again.

[teshreve]

The 900 25C packs probably cost quite a bit more, but the ones I have actually provide more power. It is (was) a clear difference for me. But my CX2 has been in the neighbor's tree for a month, so don't listen to me :YeaBaby:
When I mean neighbor... he's on 10 acres and I am on 6.5. Big tree. Long ways away. But I do know where it is. yay

[JJ's Hanger]

What does the 10C and 25C mean? I understand the mAh and voltage rating but not the "C" rating.

[benzee1]

The C rating is the maximum average rated discharge rate. Basically a higher C rating is more power.

Read this:
Lipos are rated by voltage and capacity; capacity is stated in mah - milli amp hours. This is a measure of how much the battery holds. In an electric plane, one key determinant for the power train is the amount of amps that a Lipo can deliver. The battery pictured is rated at 11.1 volts, 2200 mah.
The "25C cont" means 25C continuous; the "40C burst" refers to how fast the Lipo can be rapidly discharged for a SHORT time period, something like 15-30 seconds; look at this as the "supercharger" rating - to be used rarely. The second set of numbers - 55A cont/88 burst - are what this battery can deliver to the system considering its capacity - 2200 mah.
The two ratings - mah and "C", combine to tell you how intensively this battery can be used with the following formula:

Continuous amp draw = (mah * 0.001) * (C continuous rating)
Continuous amp draw = (2200 * 0.001) * 25 = 55 Amps Continuous Burst amp draw = (mah * 0.001) * (C Burst rating)
Burst amp draw = (2200 * 0.001) * 40 = 88 Amps Burst

This particular battery can deliver 55 amps to the system continuously; if needed and the system can take it, it can deliver a short burst of 88 Amps for 15-30 seconds.

[teshreve]

Basically, C stands for capacity. The capacity is the mah thing.
Simply take the mah rating, move the decimal 3 places to the left and multiply times the C rating.

Given: 900mah 25C pack
Simple formula: .9 x 25 = 22.5
Result: the pack can be safely discharged at 22.5 amps

[Steve Joblin]

Here is a great "non-technical" description that Pinecone posted in another thread:

mAH is like how much gas does it the tank hold.

C is how fast can you deliver the gas.

Larger mAH means longer flight time for the same setup.

Higher C means you can draw more current for more power. The two go together.

850 mAH 15C will deliver up to 12.75 amps. The 800 mAH 22C will deliver up to 17.6 amps.

At the same amp draw, the 850 will last about 6% longer time.

[JJ's Hanger]

Thanks guys. I appreciate the education and love how easy it is to learn something new on this site.