More than just a fancy name. TURNIGY nano-tech lithium polymer batteries are built with an LiCo nano-technology substrate complex greatly improving power transfer making the oxidation/reduction reaction more efficient, this helps electrons pass more freely from anode to cathode with less internal impedance. In short; less voltage sag and a higher discharge rate than a similar density lithium polymer (non nano-tech) battery. For those that love graphs, it means a straighter, longer curve. For pilots it spells stronger throttle punches and unreal straight-up performance. Excellent news for 3D pilots!
Unfortunately with other big brands; numbers, ratings and graphs can be fudged. Rest assured, TURNIGY nano-techs are the real deal, delivering unparalleled performance!
* The nano-core technology in lithium ion batteries is the application of nanometer conductive additives. 1) The nanometer conductive additives form ultrastrong electron-conducting networks in the electrodes which can increase electronic conductivity. 2) These additives create a superstrong ability for imbibition in the carrier liquid to supply more ion channels. This improves the ability of ion transmission and ion diffusion. Through improving electronic conductivity and ion transmission, the impedance is reduced and the polarization of high rate discharge decreases greatly. Advantages over traditional Lipo batteries. Power density reaches 7.5 kw/kg. Less Voltage sag during high rate discharge, giving more power under load. Internal impedance can reach as low as 1.2mΩ compared to that of 3mΩ of a standard Lipoly. Greater thermal control, pack usually doesnt exceed 60degC Thickness swelling during heavy load doesnt exceed 5%, compared to 15% of a normal Lipoly during heavy load. Higher capacity during heavy discharge. More than 90% at 100% C rate. Fast charge capable, up to 15C on some batteries. Longer Cycle Life, almost double that of standard lipoly technology.
Hi Mikoyan, It's the standard red JST connector (8A rated) used on small LiPos throughout the hobby. For some reason HobbyKing calls it a "mini-JST" connector, but if you go to JST's own website you'll find that the JST company doesn't use the "mini-JST" name for any of the connectors they make. It just seems to be a common term used on certain hobby websites. Cheers, EA!
This battery has an advertised discharge rate of 25C. That's a current of 950 * 25 = 23750mA = 23.75A. From what I can find the mini-JST connector is rated for 5A max current (some people say 10A with larger wires). That would indicate the connector for this battery cannot support the advertised discharge rate of the battery. Am I missing something? What is the wire gauge used with this battery? If it's large enough to support the discharge rate I could just change the plug.
Hi John, I'm not sure where the 5A max number came from, but 10A (constant) with higher bursts is no problem for the connector/wires. The general cut-off for HK LiPos supplied with the JST connector is 1000mah/20C or 20A max possible current. This battery could have gone either way, but HK chose the lighter set-up because this is more likely to be used in smaller planes drawing 10A-15A max. The logic stands up in actual use. If you run a plane at the full 20C output your flight time is under 3 minutes, so most people would be running these at an average output closer to 10A (average) to get 5-6 minute flights. I use these on a small 3D foamie that draws 13A-14A peak but average over the flight is just under 10A. The wires are never warm and I have never had a connector fail. I fly every day (often twice) the weather allows which is hundreds of flights on my LiPos. Hope this helps put your mind at ease. Cheers, EA!
Thanks for the response. The 5A number can be found in a number of forums and if you actually check the JST web site, you can see the JST-RCY connector is spec'ed lower than that (3.5A). I suppose it's possible these connectors are not identical to the JST-RCY, but 10A sounds like a lot for this little connector. At any rate, I got a couple, will replace the plugs and see if the wires can hold up.
Hi John, I had a look at JST's UK website and you're right about the 3.5A rating. The thing is, that rating is based on continuous operation in a device which runs 24/7 with a safety factor (1.5?) included, as determined by a room full of lawyers, engineers, etc. deciding how much risk is acceptable. (I'm a retired mechanical engineer and have sat in those meetings.) Heat in connectors/wires is a real problem over the long term ... plastic/insulation becomes brittle, metal/wire oxidizes, etc. But this hobby is a different case completely. 10 minutes is an eternity of run time. At 10A, does the connector/wire temp rise a few degrees during a flight? yes. Would the connector/wire get hot if you pulled the maximum 23.75A these batteries can deliver? Yes. But a few degrees for 10 minutes doesn't equal a failed connector. And nobody runs a system drawing 25C from their battery because that equates to 2 minutes of operation. It's a game of calculated risks. This LiPo with a JST is right at the top of that risk range, but in actual practice, 10A for 10 minutes will not affect the connector/wires. I have 3 of these with over a 100 flights on each and they're as good as new. If you still feel the need to use bigger wire/connectors you should pick the next size up that comes with an XT60 and save the time/effort of changing these over. Cheers, EA!
Hi Oscar, The 69g spec is the actual item weight, although mine weigh in at about 72g ... could be scale error. The 112g weight is the packaged shipping weight upon which your shipping charges will be based. Cheers, EA!
Hi Casper, The most efficient way to post buddy codes is to use one of the websites that lists all available HK buddy codes. The best one (IMHO) is the RC-International site. It seems to have the most available items and it's searchable for exactly which item you're looking for. The website is: hk.rc-international.info/swarm Cheers, EA!
Thank you HK moderator who took down my incorrect reply re current ability. You have save my further public embarrassment as to the extra "zero" I added to the figure.
Thanks also for correcting the info on the item itself.
I'm already buying two more as I find them very good. I use them to fly my custom made mini quadcopter. they are light and full of power. I charge them at 2.5A and they are all the time cool.. never felt them hot.