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  • VaNDAL_UK: ANyone FPV onver Sutton Park Birmingham?
    December 07, 2018, 12:54:30
  • steveo9007: Cheers Atom was just a thought for now as I plan on keeping it well in range until I get comfortable with controls and flying
    December 05, 2018, 21:01:25
  • atomiclama: steveo You can just plug a GPS puck into the FC and get the OSB to display the coords, record the VTX and when things go tits up you have the last known posistion. Whislt not accurate it is a good starting point. Or get the coords sent back by telemetry to you TX which will be more accurate as long as power is maintained to the quad and it is range with the TX. Just some thoughts.
    December 04, 2018, 12:27:26
  • steveo9007: Is there a post on here about the 433mhz telem tx ??
    December 04, 2018, 07:56:49
  • steveo9007: ok thanks shaw
    December 03, 2018, 20:31:44
  • shawdreamer: meanwhile the 433mhz telem option I mentioned gives you live fixes in realtime and not "delayed texts"..... plus it doesnt cost you credit everytime you request a gps fix (btw the tags sim card also needs to have credit on it :laugh:)
    December 02, 2018, 20:47:10
  • shawdreamer: and yes that does actually work..... I tried it for a laugh a couple of years ago ::)
    December 02, 2018, 20:45:09
  • shawdreamer: the tags do as you say use satellites to get positional fixes but they dont immediately report those fixes to an App, each tag requires a Sim card (same as your phone) which is used to "text" you the tags position..... in other words you could get the exact same effect by strapping a old smartphone to your frame with the google "where is my device" app installed
    December 02, 2018, 20:44:13
  • steveo9007: doesnt the tag communicate with the satellites and not via a data system, isn't it the user who owns the tag go via data to the app that can locate the tag ???
    December 02, 2018, 18:18:11
  • shawdreamer: plus, alot of the lower end trackers struggle with GPRS and often rely heavily on GSM data instead which is just not worth a sh1te when it comes to pinpointing a downed frame
    December 02, 2018, 16:23:30
  • shawdreamer: most readily available gps trackers are not really suitable for anything smaller than a 400 sized frame as the units themselves are often too bulky for anything smaller and larger frames often already have their own gps setups that can simply be outfitted with a 433mhz telem tx that would report live and accurate info direct to a ground station so there'd be no point in a sms type tracker
    December 02, 2018, 16:22:07
  • steveo9007: anybody fitted a GPS tracker tag to their drones if it gets lost and is need to find it
    December 02, 2018, 14:56:36
  • Gav: yeah too much of a hike for me too.  was tempted with the bike show the other week but TBH its not worth it - no bargains anymore and rip off parking
    November 29, 2018, 20:11:21
  • Bad Raven: Too far for me.
    November 29, 2018, 08:27:36
  • hoverfly: Sunday drone show , N.E.C.  anybody   going.??
    November 28, 2018, 18:36:04
  • Bajadre: Congrats DB brother  !!!
    November 25, 2018, 03:09:56
  • hoverfly: I wish i haden't eaten a whole ham and egg pie........ pass the Rennies.. :cry
    November 21, 2018, 17:23:37
  • ched999uk: Don't yo just hate those days where you wish you never got up!!!!!!
    November 21, 2018, 15:46:06
  • Reman: Isn't it a spooky coincidense how seconds before banggood have a sale nearly all the prices of the on sale items go up, But the discount drops the price back to the pre sale prices?
    November 21, 2018, 05:46:29
  • DarkButterfly: Certainly hard work but well worth it ::)
    November 19, 2018, 22:19:02

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Author Topic: Fully Charging 1S batteries  (Read 55 times)

Offline Bad Raven

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Fully Charging 1S batteries
« on: December 01, 2018, 07:52:06 »
Everyone needs the max flight time and power safely out of their packs, particularly the micro sized 1S where every little bit of charge makes quite a difference, right?

OK, every week at least twice a week I'm faced with having to charge between 50 and 100 1S in one session. 150mAh to 300mAh.

Over time while doing this I have discovered that what looked like packs getting tired was in fact a weird charging effect, or at least could be easily negated.

It's also evident that these tiny packs if left full charge for weeks do tend to leech away voltage slowly, however high numbers and frequency of use precludes me ever being able to practically use Storage mode.

I have eight mainstream chargers that will "do" these small packs, done with or without parallel leads or charge leads wired to "pretend" they are 6S. However, these are often in use with larger packs.

I have also found it was beneficial despite the large number of calls I have to sometimes charge at site, particularly in school session where in an hour and a half up to 80 cells are used!

To this end I bought a Mains to multi USB output power unit, and have three of the small black multi-way USB chargers which were offered with batteries as a set. One is five way, two are four way. These show the  simple red LED on Charging, RED led out Charged indication. These are used both at home and at site.

I also have a couple of the 4.2/4.35 switchable 6 way and USB chargers, fed from 4S XT60 or a wall PSU. I normally use a 12v 2A PSU at home which came with the "Pearl" screen, but a 4S 4000mAh pack is taken for my personal use out at sites if required. I do not use these for school use as the battery is plugged straight to the board, risking handling damage, the other type is fly lead, less likely to be damaged and anyway easily replaced if damaged or worn.

In use I found that if a cell was above around 4.12 to 4.14 it would not charge to 4.2.

If the cell had 3.7-4.14 and was plugged in with the charger "live", it would either indicate charged or charge briefly but always seemed to cut off early around 4.15/4.17 at best.   :hmm:

HOWEVER, experimenting, I found that if the cells were plugged in either before applying power to the charger, or if already plugged in when "charged" was indicated early, then the supply cycled off/pause/on, the charger would then in almost all cases charge fully to 4.2 (often 4.21 to 4.22v).

I have done this so many times now it is way beyond chance.   

If a cell under this method THEN refuses to charge to 4.2 it IS tired, but it vastly reduces the apparent  "time expired" cells with reduced highest voltage.

The highest voltage I have ever seen coming from this method has been 4.23, so IMO the above does not result in over-charging, but its YOUR call. I'm simply stating what I have found.

Offline ched999uk

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Re: Fully Charging 1S batteries
« Reply #1 on: December 01, 2018, 12:11:05 »
Great bit of info, especially at this time of year when the 'Whoops' are getting lots of use due to weather.
Thanks.

Offline shawdreamer

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Re: Fully Charging 1S batteries
« Reply #2 on: December 01, 2018, 12:42:43 »
yep "whoops" is getting murdered right now....

just the other day I farted in a lift in M&S....couldnt deny it as it was so loud it was obviously me so I did the only thing I could "coy grin and "whoops sorry about that" <nods understandingly>
550 custom H-copter (redesigned)
zmr250
Reaper250 V.1
Podracer v2
zmr250Hybrid
250 Twinboard
Project Sparkie (under repair)
https://www.thingiverse.com/shawdreamer/designs