My experience using standard LiPos in an H Plus were a little surprising. When I first flew a Typhoon H pack (with around 100 cycles), in my then - new H Plus, I expected a lower flight time from fully charged to first battery warning. As mentioned above the low battery warning voltage is different in the two aircraft. What I found was: I got about the same flight time (about 14.5 minutes) before the first "Low Battery' warning. When I let that pack cool down, I placed it on a charger to return it to storage voltage and found is was about smack dead on Storage already!
Meaning: I probably could have flown another three to four minutes! This is assuming that one would have to disable the RTH on the third (and every following) warning which activates every 30 seconds.
Thanks guys, good info. I did a massive no-no and overcharged a standard 14.8 to 15.2 voltage with no issues. i am highly aware this will decrease the batteries life. did some looking online, it seems this is "OK" if you understand the risk, and the lower cycle life. a stock yuneec 5400 14.8V (charged to lihv voltage) took 6100 Mah and flew longer than a 4P for the plus! got a extra 1 minute 30 seconds!
Keep in Mind that the rating of a 4S LiPo is listed as 14.8 volts. That is the
nominal charge of 3.7 volts per cell. However, fully charged a LiPo cell will reach around 4.2 volts which gives a total pack capacity of around 16.8 volts when fully charged. There is NO
abnormal wear to a LiPo for fully charging (and in fact it is recommended), however, what does cause abnormal wear on a LiPo is extended periods of charge at the extremes. In other words: Leaving a pack fully charged or fully depleted causes the most degradation to a LiPo.
By Contrast, an LiHV pac as used in the Typhoon H Plus has a cell voltage of 3.8 volts, for a total of 15.2 volts
nominal and a maximum volt per cell of 4.35 volts for a total pack capacity of around 17.4 volts which is normal when fully charged.
And while we're on the subject, we shouldn't be fooled by the word "Lithium" Some folks hear that, and treat ALL packs or cells the same as a LiPo - This is Wrong. LiPo refers to
Lithium
Polymer. These are the packs we typically see powering our aircraft. While at the same time, the Packs in our controllers are also "Lithium" but they are LiION or Lithium Ion. Like a Cell Phone and just about every other electronic rechargeable device you own - these batteries can (and should), be stored - "fully" charged.
