Recent content by smithmal

Yes, absolutely and great advice. Have read alot about people warning not to over-tighten the cathode/anode screws and breaking the stud loose from the main battery (i.e. ruining the battery).

flippy, Thanks for the reply. Not sure of the origin, but yes I would never attempt to use them near their official ratings. Plan on charging/discharging below 0.5C for my pack (48Ah pack making 0.5C = 24A). Most likely will charge @ 10-15A (146 - 219 watts) which would take 3 hours to...

flippy, You are incorrect. The cells tested in those videos I linked above are not brand new. They come from the same eBay seller I bought mine from (alarmhookup). The seller indicates testing capacities of these cells @ 90%-102%. Richard Lloyd's video saw all of his used cells testing at...

Interesting, the tests that Jehu performed in this video back up the claims in terms capacity and current: https://www.youtube.com/watch?v=MdhyOFeOqyE Also this video review backed up the capacities that were stated from the same source that I obtained them from. I believe the tester observed...

Flippy, Sorry, confused. Do you mean the Headway's won't provide the 50A (needed for the trolling motor) or take 5A of discharge (for draining and bottom balancing/cycling the batteries? Thanks, smithmal

Does anyone have any thoughts about the following charger: https://www.amazon.com/Ultra-Power-UP100AC-Multi-Chemistry-Charger/dp/B07B41J4XQ?keywords=ultra+power+up100ac&qid=1539192761&s=Toys+%26+Games&sr=1-2-fkmrnull&ref=sr_1_fkmrnull_2 Video Review on it here...

amberwolf, The reason that I choose the 38120 batteries without getting advice from the forum was a deal on salvaged cells sprang up right after I started the thread which I thought was too good to pass up so I jumped on it. I thought about changing the thread title to "Help building a 12V...

Below is a pic of how I would arrange the batteries for this pack in a 4s6p orientation. Please let me know if this is incorrect: https://drive.google.com/open?id=1nVejypWLYV13upVyiJavYu5GQA9cAe0c The most current my trolling motor could pull (Minn Kota Endura Max 55) if I had it on full...

Okay... sorry for the edit but decided to go with HEADWAY 38120 HP 3.2V 8AH LIFEPO4 LITHIUM BATTERIES 25C cells since I got a good price on them (reclaimed cells) for $10 a cell: https://www.ebay.com/itm/4-HEADWAY-38120-HP-3-2V-8AH-LIFEPO4-LITHIUM-BATTERIES-25C-200A-12V-SUPER-CELLS/183397230915...

I've read several battery pack build threads on this forum, but usually the person already has battery cell in mind when building their pack. In this case, I'd be very interested in hearing from everyone if they were going to build build a sub $500 50-75Ah 12V LiFePO4 battery (with continuous...

So I'd like to build an 80Ah battery using 38120S batteries. The batteries are LIFEPO4 Headway 38120S, 8Ah, 3.2V 25C. If I understand correctly, this would mean creating a 4S10P battery correct (i.e. 40 total batteries needed)? That would give me a 12.8V 80Ah battery right? The dimensions of a...

Mark, Thanks for all the info. There is little to no build data regarding people making DIY 12V batteries using 38120 batteries so this thread is very helpful. The link above for the GWL 12V/90AH product is very interesting (around $570 shipped). I'm assuming since you bought 38120 batteries...

Mark, New to the board and am possibly interested in building a similar battery pack using Headway 38140S batteries. How did you fair with completing your DIY battery pack? Did you install a BDS onto it? I would assume that's the best move to ensure all your batteries are balanced when...