Search found 77 matches

by Dak77
Feb 08 2020 3:48am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 338
Views: 30469

Re: Li-ion cells cycle ageing

Damn 30q is getting long in the tooth @ 400 cycles or so, closing in on 29e IR wise Would be good to see HG2 also to find out which is the longest lasting out of the 30q/Vtc6/Hg2 trinity Honestly, it doesn't look that bad considering the current it can handle. I agree that I'd love to see HG2 vs 30...
by Dak77
Feb 08 2020 3:41am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 338
Views: 30469

Re: Li-ion cells cycle ageing

So 29E started with the highest available capacity at 4.1v -> 3.3v in relation to it's 4.2v initial capacity , and maintained almost no substantial dcIR rise throughout. Unless I'm looking at it wrong. Considering availability, cycle life, price, and low IR ; it seems really hard to beat . All that ...
by Dak77
Feb 06 2020 12:03am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 338
Views: 30469

Re: Li-ion cells cycle ageing

Wow. I knew colder temps raised the IR , but I had no idea how drastically each deg. affected it. Very good info . Does continued use at low temps cause permanent accelerated degredation? I mean, you are effectively operating the cells at an increasingly higher C rating with increasingly higher resi...
by Dak77
Feb 05 2020 11:47pm
Forum: Battery Technology
Topic: Reliable Online Battery Retailer
Replies: 1
Views: 195

Re: Reliable Online Battery Retailer

Liion wholesale and batterybro are worth considering. I've had good communication with batterybro and I felt confident the sales rep I worked with lost a sale to me by being straight up and honest. It was a gesture I haven't forgotten and I am likely to make my next big order with them.
by Dak77
Jan 28 2020 8:11pm
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 338
Views: 30469

Re: Li-ion cells cycle ageing

Worth noting, long term beyond the current graphs , M36 may end up being the undisputed king , but up to 650 cycles , if availability is there and price is less with 29E , it looks like a better option to me. In the 4.1>3.4v range , it has more usable capacity and reportedly can handle a bit of abus...
by Dak77
Jan 27 2020 5:08pm
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 338
Views: 30469

Re: Li-ion cells cycle ageing

One of those is not like the rest 8-D Seriously, I am not worthy being mentioned on that list I mean I appreciate the thought, but let's just call it an "A for effort" No I agree. Just because you aren't testing doesn't mean you aren't bringing a lot to the table. The information the testers are pr...
by Dak77
Jan 08 2020 11:53pm
Forum: Battery Technology
Topic: Best 18650 cell for 3p 18A max
Replies: 24
Views: 961

Re: Best 18650 cell for 3p 18A max

izeman wrote:
Jan 08 2020 4:30pm
Pajda wrote:
Jan 08 2020 2:34pm
izeman wrote:
Jan 08 2020 11:55am
Who/what is Pajda?
:lol: :lol: :lol: :wink:
8) So would you recommend the MJ1 for my application as well? :wink:
From what I've gathered from various posts pertaining to discharge loads in that neighborhood, LG HG2 would be my pick.
by Dak77
Dec 12 2019 1:03am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 338
Views: 30469

Re: Li-ion cells cycle ageing

You guys are awesome. Thank you Doc, Pajda, and Flippy for your work. That M36 does look amazing and MJ1 seems to follow in its tracks . And 29E beating the brakes off the PF. Nice . Can't wait to see how the 30q does after 300 or so, if you decide to take it that far.
by Dak77
Nov 30 2019 1:56am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 338
Views: 30469

Re: Li-ion cells cycle ageing

This post isn't directly related to the point of this thread, but I have some personal experience to share about longevity . Yesterday I hit the 9 month mark on my battery and I have logged 26 cycles of 56.7v to 50v . Now that it's winter, I'll probably be down to 1 or 2 cycles per month until aroun...
by Dak77
Nov 26 2019 2:01am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 338
Views: 30469

Re: Li-ion cells cycle ageing

Just know that what you're doing is extremely helpful and valuable to the community. Anybody that implies otherwise is an idiot. If this group of tests had been posted 6 months ago, I would have never used PF over 29E. The info was out there, just not as clearly and nothing as blatant and matter of ...
by Dak77
Nov 22 2019 4:55pm
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 338
Views: 30469

Re: Li-ion cells cycle ageing

Hopefully I am not annoying too much, if I again recommend to consider Pajda´s posts as a required reading. Just open some text editor and with ctrl C / ctrl V do your own Reader´s Digest. The quantity of needed separated cycle-life tests starts in my opinion at number 3 or 4 at least, ending somew...
by Dak77
Nov 22 2019 12:36pm
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 338
Views: 30469

Re: Li-ion cells cycle ageing

This is derailing the point of this thread . People are putting a lot of personal time into this much needed and appreciated testing and I've probably worn out the subject a long time ago with my 20 different ways of asking the same general questions, so this will be one of my last posts about it💃💃🙌...
by Dak77
Nov 20 2019 12:48am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 338
Views: 30469

Re: Li-ion cells cycle ageing

Now that I've seen how awesome the M36 is , it makes me wonder how it would handle 5-7A. The miraculous this cell is not. At 3C continuous it wear out in just 100 cycles. That reminds me. I remember you posting about the M29 a bit . Between all the 2900mah , is the 29e best equipped to handle 2c lo...
by Dak77
Nov 18 2019 6:27pm
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 338
Views: 30469

Re: Li-ion cells cycle ageing

Now that I've seen how awesome the M36 is , it makes me wonder how it would handle 5-7A. The miraculous this cell is not. At 3C continuous it wear out in just 100 cycles. That reminds me. I remember you posting about the M29 a bit . Between all the 2900mah , is the 29e best equipped to handle 2c lo...
by Dak77
Nov 18 2019 2:45pm
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 338
Views: 30469

Re: Li-ion cells cycle ageing

Now that I've seen how awesome the M36 is , it makes me wonder how it would handle 5-7A.
by Dak77
Nov 16 2019 8:03pm
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 338
Views: 30469

Re: Li-ion cells cycle ageing

So it appears that 29e has a similar to PF capacity trend downwards ,but starts off higher at the same load ,maintains a much lower DCIR, and appears to be a much better choice based on that. M36 appears to be clearly far superior to them all , and GA appears to be utter garbage in comparison . The ...
by Dak77
Nov 14 2019 12:06am
Forum: Battery Technology
Topic: New 14s battery pack, US18650VTC6 vs NCR18650GA
Replies: 190
Views: 13368

Re: New 14s battery pack, US18650VTC6 vs NCR18650GA

Would a resting voltage of 3.85v per cell be damaging over the course of 2 weeks? Should I be draining the pack down to 3.6v or so when Im not using it the same day?
by Dak77
Nov 11 2019 7:26pm
Forum: Battery Technology
Topic: New 14s battery pack, US18650VTC6 vs NCR18650GA
Replies: 190
Views: 13368

Re: New 14s battery pack, US18650VTC6 vs NCR18650GA

Vruzend no longer relies on "friction fit", as of v2.1 V2.1 is still a "friction fit" as was its predecessor the V1.6 kit which has 12 compression barrel bolts. The V2.1 kit only has 8 compression barrel bolts, but each is suitable in the right hands for its suited application. With the addition of...
by Dak77
Nov 07 2019 4:09pm
Forum: Battery Technology
Topic: Lipo slightly puffy
Replies: 32
Views: 2637

Re: Lipo slightly puffy

The one reason I went with the "Uberscoot" style frame was the fact that it was sturdy, had two disc brakes, and dual suspension. I've taken mine to 32 mph with no fear of it falling apart. My controller is a Kelly 55a continuous. Would appreciate a picture of your battery and scooter setup for ref...
by Dak77
Nov 07 2019 12:26pm
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 338
Views: 30469

Re: Li-ion cells cycle ageing

I do realize that this is one of the , if not THE go to forum for anything battery powered , but still the level of knowledge funneled in here is sometimes very humbling. Are most of you electrical engineers or industrial electricians? This forum is a mixture of electrical engineers, mechanical eng...
by Dak77
Nov 07 2019 12:20pm
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 338
Views: 30469

Re: Li-ion cells cycle ageing

I do realize that this is one of the , if not THE go to forum for anything battery powered , but still the level of knowledge funneled in here is sometimes very humbling. Are most of you electrical engineers or industrial electricians?
by Dak77
Nov 07 2019 12:12pm
Forum: Battery Technology
Topic: LG HG2L
Replies: 3
Views: 394

Re: LG HG2L

Right on. Thank you both for the replies.
by Dak77
Nov 06 2019 10:26pm
Forum: Battery Technology
Topic: LG HG2L
Replies: 3
Views: 394

LG HG2L

Has anyone had any experience with the LG HG2L yet?
by Dak77
Nov 06 2019 10:06pm
Forum: Battery Technology
Topic: Lipo slightly puffy
Replies: 32
Views: 2637

Re: Lipo slightly puffy

Cheap ones have a habit of being black boxes, can't handle the current lipo can deliver, and can murder the battery themselves.. My method is to have one battery, so it gets regular exercise. The more often it's charged, the more it stays balanced. I don't even have to know the details of what the ...
by Dak77
Nov 06 2019 6:19pm
Forum: Battery Technology
Topic: Lipo slightly puffy
Replies: 32
Views: 2637

Re: Lipo slightly puffy

The one reason I went with the "Uberscoot" style frame was the fact that it was sturdy, had two disc brakes, and dual suspension. I've taken mine to 32 mph with no fear of it falling apart. My controller is a Kelly 55a continuous. Would appreciate a picture of your battery and scooter setup for ref...