Originally Posted by Spyro37
One way of getting the most out of these lipos is not leaving them charged. Many of us does not know that. I usually charge my lipos (already half charged) on my way to the filed, in my trunk. If I have to go home, and my lipo is fully charged, I would at least run them on the ground for a minute, just so they are not fully charged while sitting in my box. Any lipo with 40C or higher could easily degrade it's life span. The lower C rating lipos are not that sensitive but will also affect it's life span and performance if kept fully charged. The 4.2V does not mean anything. That's just the potential difference between the terminals. If the lipo chemistry is going bad, that voltage will drop under load. So you need to make sure lipo chemistry is taken care the way they should be. More so, if you go GO BIG. My large batteries are broken-in before I use them. I do 3-5C discharge rate 'till they are 3.85V per cell 4-5X (or cylcles)
I'm only using stock motor. After 9 minutes, they are just warm. So no stress on my lipos. I have 4 pcs of them.On a calm day, I sometimes fly them 3 hours none stop (2 days/ week) using my charger with my added ports. I would say around 200 flights
between the four lipos with no performance difference since I got them & from take off to landing. Heat is another enemy of lipos. The stock motor does not pull much current, so it could be one reason why my lipos are still good. Some guys would fly their 130X twice in a row (4min each), and I'm still flying the 120 with the same lipo
The charger on the picture is 2AMP max on 4S = 0.5A charge rate MAX per cell
. I made some extra ports and terminals so I could charge different lipos and friends could charge too. I could charge 12 lipos (1S &2S) simultaneously including the stock ports. I was thinking of upgrading my 120 motor but there is no point, since I have the 130X. This charger charges/balances each cell independently.
The tail vib on spool up on the 130 is usually caused by the tail shaft not square (90*) with the hub. I bought 3 brand new shafts and only one was good. I run them 3X (install & removed). I marked them with red, blue & black marker respectively. Each time I try to re-install the shaft, that same shaft will vibrate the same intensity. One was good out of the 3. Four of us flew 130X today including one maiden. None of us has any tail vib or shake. Shake is easy to fix. Silicon grommets and gyro adjustment will take care of it 100%. Apparently, the 3axis gyro , by default is set at the mid point. The Rudder, Ail and elevator needs to be adjusted if shakes is present during fast speed flights, and could take as much as 6clicks to lower the gain. Tail wag = too much tail gyro gain. Body shake = Too much Ail. If it is flying like a horse or Kangaroo = too much Elev gain. Spool up Vib = bad tail shaft or scotch tape on the tail blade is the possible fix.
Good info. Of course I'm sure you know that i already know all of that. But one of the important things for me in this hobby in online communication is repetition. I feel like we can't go around assuming everyone knows all of this stuff. We should always assume the opposite and not be offended when someone assumes you don't know. Otherwise how will anyone ever learn anything? Since most people don't just go around asking all these kinds of questions.
But the fact still remains that 850-950 mAh packs don't seem to last as long as any other pack i have owned. Sure, these days i don't care too and don't have the time to care for my crappy v120 lipos. I have bigger 6S packs to worry about now. But, I have yet to have a 850-950 mAh pack last more than 30 cycles while utilizing 100% of the lipo care guidelines like i used to do when i flew these micros every day. Back when i had a couple of Nano packs still. I just threw 12 packs in the trash (after cutting off the wires and discharging the pack fully) This last set of them were a mixed assortment of all different brands. Since i was flying my X5 and 450s every day and neglecting these little ones. The packs just stayed charged. Especially after a crash i couldn't fix. All of my "fullriver" 600 mah "stock" D02S packs are still performing like they were new. The original pack that came with my heli back in March looses power at about 2 minutes 30 seconds instead of 3 minutes like the rest of them. Then when i land and put a meter on them they are at 3.8v. Maybe 3.75 at the lowest. Everything you just said about battery care is absolutely true. Except even when i take proper care of these packs they don't last as long as the smaller packs. That was basically what i was driving at. I just didn't know if others had the same experience as me. Obviously from the last few posts above this, they have. But i suppose for $3 it's not a big deal. I think for how few and far between my flights are. I think I will be sticking to the fullriver 600 packs and 3 min flights for $5 a pack. Just so i can trust that i can keep them ready to fly for 8 months without worrying about having to replace them.
Not for nothing, but i have a Turnigy 2200 mAh 3S 30-40C pack that was sitting charged for over a month now because the battery charger plug got damaged. I recently had another pack go bad on me and i repaired the pack with the bad plug and flew 5 minutes with the pack with no problems.
My basic assumption is that these 800-950 mAh packs are just not capable of lasting as long as any other pack that i have owned. But they are cheap and when they are new they work great. The Turnigy nano packs i had seemed to last the longest. They lasted about 30 cycles (about 2 months maybe) before they lost output power and bogged the motor almost immediately after take off. That was back when i was flying these helicopters 6-12 flights a day, every single day. So the packs never stayed charged longer than 24 hours and got cycled again. I thought i was just cycling them out to EOL. So the next time i bought some no name cheaper packs that came in a bulk order. They went bad just from sitting for maybe 2 weeks fully charged. Again, my D02S packs are ALWAYS fully charged. Even right now, i flew 3 packs last weekend but those packs have been fully charged for months with only sporadic use in between flying my big helicopters. I might cycle the packs once a week if they are lucky. But otherwise all my D02S stock packs remain fully charged and waiting for me in the trunk of my car. Some times in the florida heat too. Obviously it's not hot right now, being only 80° during the afternoon. But you know what. I treat my 450 packs the same way. The most they stay at full charge for is about 3 days though. After that i grab them and stick them on my charger for a "storage cycle", if i think i won't be flying for a few more days. Before 24 hours is reached i usually put my packs in the refrigerator (NEVER THE FREEZER!!!!!!!!!!) if they are fully charged. Keeping them cold slows the chemical reaction processes and prevents rapid degradation. But again, never for more than 2-3 days at most!
Originally Posted by bobfa
hmm, good post... taking note as my nanos go bad pretty quick. Anyone know of a technique to restore the lipos that go bad. I have about 5 small 80 mah eflite batteries that went bad from keeping them charged and not using them I put them in the freezer for a month partly charged, took them out recharged and a few came back to life. Wondering as I have quite a few under used lipos, mainly nanos that just will not power my genius anymore. I have a new V120 and batteries coming from Santa and I need to start taking care of my lipos.
Once a pack starts going bad there is nothing you can do to repair it. It's a chemistry thing. To keep it simple. Basically, the chemicals inside the pack break down and are no longer transferring electrons through the electrolyte as fast or in as much quantity as when the pack was new. Nothing you can do can fix this. You just have to replace it. Don't question yourself. Don't wonder if maybe if you stick it back on the charger it might work. Just DON'T. Save yourself some money and just toss them before it costs you a crash.
Originally Posted by flint723
One thing that will improve response is to use the stock 130x high performance main blades. But you will probably have to completely re-tune the gyro pots, they fly a lot different than stock blades. I had to turn the ail/ele extent pot down to get it to a more normal flip speed.
I don't know why i didn't say that too.. I keep forgetting how much improvement those KDBB 130X blades gave me sometimes.