H920 replacement battery

OnTheRopes · Jul 14, 2018

PatR said:
You may have to spend some time researching battery dimensions at sites that will ship to the U.K. I’ll post the battery box dimensions when I get back to my laptop.

The EC- 5 connectors won’t work. Someone tried the no wires adaptors and found they don’t work well because of how stiff they are in length after being added to the battery’s connector.

Thanks for that, I have your battery box dimensions from an earlier post on this thread so save yourself a job.
I have decided to give these a go 4250mAh 6S 22.2v 35C LiPo Battery - Overlander Supersport Pro
obnoxiously expensive but hey ho.
Re ordered the cancelled soldering iron and accessories

thoneter · Jul 14, 2018

Good to hear you found a solution. Unlike PatR or Steve my memory on all of these posts is very poor so I don't remember what batteries others from EU were buying.

PatR · Jul 14, 2018

There's a thread on FB where they talk about some dealers in Germany and elsewhere in the EU coming up with some different batteries. All of them seemed pretty expensive to me but those folks have to deal with VAT. If someone farts in the handling process a new tax percentage is added for the activity. Come to think of it, In the E.U. and California they do tax cow farts...

thoneter · Jul 14, 2018

When it comes to hot air and flatulence I think the politics in CA are hands down the winners. San Francisco the only city that spends 30 million to clean human crap off of the city sidewalks. Out here only the cattle poop where they sleep

OnTheRopes · Jul 14, 2018

thoneter said:
Good to hear you found a solution. Unlike PatR or Steve my memory on all of these posts is very poor so I don't remember what batteries others from EU were buying.

Not certain it's a solution just yet but I will report back when I test them out.

PatR · Jul 14, 2018

The mA rating of those batteries would put flight time around 18-20 minutes, max. OTOH, that's better than what the Yuneec batteries will do at this point in their life cycle. As for the battery price, once the VAT is removed the price is not much over HK's Zippy 5000mA price. HK is ~$72.00U.S. as of a couple days ago.

FYI, for those with a Typhoon H, there are reports of people currently buying "brand new" batteries from Yuneec for them with a mid 2016 manufacturing date. It may come to pass Typhoon H owners could end up having to come up with their own power source solutions.

PatR · Jul 14, 2018

A link to one of the batteries discussed on the FB pages: SLS XTRON 4000mAh 6S1P 22,2V 30C/60C

thoneter · Jul 14, 2018

Swaytronic Iced Power LiPo Akku von Swaytronic 5000ma 35c/70c $109 EU for 2 I think.

OnTheRopes · Jul 14, 2018

PatR said:
The mA rating of those batteries would put flight time around 18-20 minutes, max. OTOH, that's better than what the Yuneec batteries will do at this point in their life cycle. As for the battery price, once the VAT is removed the price is not much over HK's Zippy 5000mA price. HK is ~$72.00U.S. as of a couple days ago.

FYI, for those with a Typhoon H, there are reports of people currently buying "brand new" batteries from Yuneec for them with a mid 2016 manufacturing date. It may come to pass Typhoon H owners could end up having to come up with their own power source solutions.

I'll be happy with 18-20 mins I don't get that out of the 3 x Tattu's

OnTheRopes · Jul 21, 2018

Today I tested the Overlander Supersport Pro batteries in the 920+

supersportpro_4250mah_35c_6s_v2.1517345522.png

The batteries are reportedly 139x42x46 mm, I did not measure to confirm this but 2 do fit snugly in the 920 battery bay, as they are fairly short at 139mm this leaves plenty of room for cables and connectors allowing the door to close easily. The batteries are supplied without connectors so I did my first soldering in several decades which after watching a couple of YT videos all went well.
The technical page on the website lists the weight at 594g whilst I weighed one at 600g and the second at 593g.
Initial voltage on receipt was 22.79v for both.
First charge put one at 25.19v with IR of 29 and the second was 25.11v with IR of 24.

So, to the test flight. I took this fairly steady without massive accelerations but then this is how I usually fly anyway.
First off put her through a couple of pre programmed CCC's. flew without GPS for a few minutes and another CCC.
I brought her in at 21.9v which was at 14mins and 27 seconds and well above my low level alarm which has been reset to 21.5v, for me this was quite a reasonable flight time compared with my 3 x Tattus which for comparison I flew right after this and got low level alarm at 14mins and 52 seconds.

Time will tell but I will probably buy a second set to keep me going until something better comes along.

OnTheRopes · Jul 21, 2018

I am also thinking of giving these a go

ultrasport_5000mah_50c_6s.1517310283.png

@PatR what do you think? At 157x44x48 it will be tight at best.?

PatR · Jul 21, 2018

Tight, but as long as they don’t swell they should work. C rating is way high but if that’s what there is to work with it won’t hurt anything, just weigh a little more. I like not having connectors already.

PatR · Jul 22, 2018

You might want to fly the new batteries down to the low level alarm after putting a few more “light” cycles on them. I’m guessing you had another 5 minutes, give or take a little, in them when you landed.

OnTheRopes · Jul 22, 2018

PatR said:
You might want to fly the new batteries down to the low level alarm after putting a few more “light” cycles on them. I’m guessing you had another 5 minutes, give or take a little, in them when you landed.

Thanks.
Yes I will do a few light cycles this week hopefully.

slick · Jul 24, 2018

PatR said:
You might want to fly the new batteries down to the low level alarm after putting a few more “light” cycles on them. I’m guessing you had another 5 minutes, give or take a little, in them when you landed.

Hi PatR. So what is the finally word on batteries which is the best option for the 920 you've tested this far .

PatR · Jul 25, 2018

I haven’t found anything larger capacity than the Zippy 5000’s that I want to spend money on yet. There is one Zippy with a little more capacity but also greater dimension, which may not allow fitting a pair. I don’t want to buy two batteries that can’t be used. For the moment I’m contemplating an externally mounted third battery.