START HERE |
|
Register | FAQ | PM | Events | Groups | Blogs | Calendar | Mark Forums Read |
Unregistered
|
Main Forum - Helicopter Talk R/C Helicopters and the people who fly them. VENDOR TOPICS DO NOT GO HERE. Full Scale Heli threads go in OT please |
|
LinkBack | Thread Tools | Display Modes |
10-30-2014, 08:18 AM | #21 (permalink) | |
Registered Users
Thread Starter
Join Date: Aug 2012
|
Quote:
The 30c worked great on the 6hvu with the compass motor. Batteries alway came down cool. They started getting warm when I started running them 1 at a time in the 480. I got the 45c this time to see if they work a little better plus the 600sx is running the 4035 scorpion which pulls more amps than the compass 12s 505kv motor. The 600sx is lighter than the compass though and I'm running a 9.6:1 ratio instead of the 8.8:1 ratio so I'm hoping these batteries will be a very good match to that bird.
__________________
Kory M2 |
|
Sponsored Links | |||
Advertisement |
|
10-30-2014, 08:31 AM | #22 (permalink) | |
Registered Users
Join Date: Oct 2011
|
Quote:
The trouble with reading IR values for two (or more) cells in parallel is that you don't know if both cells are about the same, or if one is very good and the other is way out of whack. To use the same numbers again, a 7.5 mOhm reading may come from a 10 mOhm and a 30 mOhm cell in parallel, or it may come from two 15 mOhm cells, or an infinite number of other combinations. If you really want to measure the IR of a cell then you have to do it one battery at a time (no parallel charging while you take that measure). |
|
10-30-2014, 08:48 AM | #23 (permalink) | |
Registered Users
Join Date: Aug 2010
|
Quote:
|
|
10-30-2014, 08:59 AM | #24 (permalink) |
Registered Users
Join Date: Feb 2014
|
My iCharger 306b reports average IRs.
|
10-30-2014, 09:12 AM | #25 (permalink) |
Registered Users
Join Date: Jan 2012
|
Lizardman is correct. Checking ir of packs in parallel does not give the average, it gives half the average. If you have 2 pack with 10mohm each, hook them in parralel and recheck, it will read 5mohm. More capacity will show less resistance
|
10-30-2014, 09:27 AM | #27 (permalink) |
Registered Users
Join Date: Oct 2007
|
Jumped off the Glacier Train
I have 4 - 2200 3s 35c Glaciers that have performed flawlessly. I read many great reviews about the larger packs so I bought 2 - 5000 6s 45c packs for my Blade 550x.After about 10 cycles each, they puffed up pretty bad. The IR per cell went from 1-2 to 9-10. What a bunch of trash in my opinion. Pulse Ultras are what I am using now.
|
10-30-2014, 09:31 AM | #29 (permalink) |
Registered Users
Join Date: Jan 2014
|
I have 4 3300mah glaicers and 2 of them are puffed bad with 2 of them still solid (I run them in all 3 of my larger heli's, 6s on my Atom 500 and 12s on my 6HVU and G570).
I just picked up a set of these however, as a friend of mine has been using them for a while and flies at very high HS's and raves about them. http://www.valuehobby.com/power-syst...300mah-6s.html Same cost as the Glaicer 30c yet these are 40C. I will report back after I get some flights through them how they are doing. I hvae high hopes!
__________________
SAB Goblin 600, Logo 480Xxtreme, Gaui X3, Compass 6HVU, Atom 500 |
10-30-2014, 09:35 AM | #30 (permalink) | |
Registered Users
Join Date: Feb 2014
|
Quote:
|
|
10-30-2014, 09:59 AM | #31 (permalink) |
Registered Users
|
I stop using a pack when it won't routinely balance charge in it's normal charge time. When that happens I'll check the IR and usually will find one or two cells way higher than the others.
__________________
AMA: 943183, DX8, Tarot 500 DFC/Vbar, Goblin 570/Brain, Blade 180 CFX, Gaui X3/Brain |
10-30-2014, 10:18 AM | #32 (permalink) | ||
Registered Users
Join Date: Nov 2012
|
I have 4 Align 850 3s packs that look like big fat prunes, ir's are in the 12 to 18 range. They still provide a 4 minute flight on the 250 but sag at the end. I've been running them for over a year and a half. I'll keep running them until they won't balance anymore or hit lvc early. Right now they still perform well enough to keep in service but I watch them close while charging and only hit them with around 1.5c. Here's a 4 minute flight with the puffy pack, last 30 seconds or so power starts to sag but the rest of the flight is perfectly fine.
__________________
Gaui X5-MiniVbar | Gaui X3-MiniVbar | Gaui X2 SK-540 | 250 Pro DFC |130X 3S GY280 | 300X-Ikon | DX8 | Real Flight 6.5 |
||
10-30-2014, 10:18 AM | #33 (permalink) | |
Registered Users
Join Date: Oct 2007
|
Quote:
|
|
10-30-2014, 10:36 AM | #34 (permalink) |
Registered Users
Join Date: Jan 2012
|
+1. I don't think the user is to blame. I broke mine in very carefully. 3 cycles on charger, and a few more hovering. The problem is consistency. Some times you get good ones, sometimes no.
|
10-30-2014, 10:48 AM | #35 (permalink) |
Registered Users
Join Date: Feb 2014
|
Well, I must be super lucky...but I doubt it... I've had many, many Glacier batteries for micros to 700s and never had a bad one.
|
10-30-2014, 10:49 AM | #36 (permalink) |
Registered Users
Join Date: Feb 2014
|
Did you contact Dale at RC Buddy (only place that sells Glaciers)? If not, why? You have 30 days to evaluate a lipo and return it for exchange/refund if it's bad.
|
10-30-2014, 11:21 AM | #37 (permalink) |
Registered Users
Join Date: Oct 2007
|
Was well beyond the 30 day period. He has replaced batteries for me in the past. That is why I am shying away from Glacier. Had 2 others fail rather early. 4 shitty batteries out of 6 isn't very good odds in my opinion!
|
10-30-2014, 11:50 AM | #38 (permalink) |
Registered Users
Join Date: Feb 2014
|
Yes, that sucks. Sorry for your bad luck with Glaciers. That's why I always break in and get some good, hard flights on a new battery within the 30 days.
|
10-30-2014, 01:11 PM | #39 (permalink) |
Registered Users
Join Date: Jun 2011
|
re my earlier post , fiddling about discharge /charge, i notice IR is not a constant.
ps; chargeing batt a&c in parallel now IR is 10. 2, 9.4, 11.6 was 34 25 22 &PS; final IR for pair 8.8 ,7.5, 7.7 Last edited by mrultralite; 10-30-2014 at 02:21 PM.. |
Thread Tools | |
Display Modes | |
|
|