You can buy them cheaper per battery at the site for the holders.
The cells cost more but are larger mah and are better cells except the QB, which are ?
Dan
OK. I am looking.
My main issue is I will need 24 cells for two decent 6S packs and I am working with limited funds as usual and the solderless kit is $27.
The batteries I really want are sold out.
https://www.ebay.com/itm/4-HEADWAY-38120-HP-3-2V-8AH-LIFEPO4-LITHIUM-BATTERIES-25C-200A-12V-SUPER-CELLS/173071152948?hash=item284bd83734:g:J44AAOSwUYNaS8aC&rmvSB=true
12 of those fully charged would be about 44V and do the trick for less than $100. I was hoping for larger higher capacity cells than 18650 or 26650 therefore I would not need to parallel them up. 6 of those will balance charge with my charger as I saw a 3.2 or 3.3 volt function on the Skycharger and the 400 watt Mega charger you sent probably has the same feature to charge 3.2 or 3.3 volt batteries.
https://vruzend.com/product/set-of-two-2-qb-2600-mah-18650-battery-cells/
That is the cheapest they have and is $72 for 24 cells but not sure if I will get raped with shipping or not. Then I still need to add $27 for the solderless kit and that exceeds what I have to spend. I am on a $80 budget for a 44 / 48V Pack right now.
I am not sure I want to order the solderless kit if I can solder 6 large capacity cells togeather times 2 for 12S. It is what I am struggling with right now.
https://www.ebay.com/itm/New-LG-LGDBHG2-18650-Rechargeable-Battery-High-Drain-Flat-Top-3000mAh-2-10Pcs/162948383453?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D49917%26meid%3Dbd8b6327f97e45948db6c296421bb436%26pid%3D100005%26rk%3D5%26rkt%3D6%26sd%3D183052507106%26itm%3D162948383453&_trksid=p2047675.c100005.m1851
This is the best deal I see on e bay right now. They are LG which are one of the top brands. However I will only get one 6S pack for less than $50. I will need two in series for 12S.
I have been on youtube looking at capacity tests for the generic no name brands. I know if they rate their cells above 34000 mAh or 3.4 Ah that it is garbage and less than 1 Ah.
I have spent almost the entire day looking. It looks like I either buy junk cells or just wait. Thanks.
OK. I got a text. I think I might be able to sell one of my bike frames on the back porch for $30. If so then I can get 24 of those LG cells and might have enough $$$ hopefully. Thanks.
3/19/18
https://www.ebay.com/itm/Lot-Samsung-18650-Lithium-25R-2500mAh-25A-Li-ion-Battery-Vape-Batteries-US/263417304586?_trkparms=aid%3D888007%26algo%3DDISC.MBE%26ao%3D1%26asc%3D49917%26meid%3Da34ab230dfa542298a0717e57528e729%26pid%3D100009%26rk%3D1%26rkt%3D1%26sd%3D273087376957%26itm%3D263417304586&_trksid=p2047675.c100009.m1982
https://www.youtube.com/watch?v=RrszFX6W_IA
https://www.youtube.com/watch?v=rrBWPbh_Ay0
I was hoping I could use pennies for battery connectors but the bottom of the AA battery melted to the penny. :lol:
I figured I would try to solder a wire to the positive terminal for practice. It took quite awhile to get a good connection.
I managed to solder two positive terminals to a wire, The soldering iron is a cheapo < $10 iron. The cheap 60W iron I got off of ebay the tip fell off so I threw it out and bought this one.
I will need much more practice on cheap cells before attempting to solder an 18650 or 26650 cell. I definatlly do not want to damage a good battery like I just did to the bottom of that AA battery. :lol:
It would probably be in my best interest to order the solderless kit before getting any cells. I am thinking about how I will wire the balance connecters. Also I could probably use some connecters. I am thinking if they are at least 2.5 or 3 Ah cells three packs in parallel will make either 7.5 Ah or 9 Ah.
It would be possible to solder three small connecters to bullets to hook to controller and a couple of connecters so I can charge with both the Skycharger and Megacharger since I am not parallel charging but balance charging each 6S pack. That is also why 2.5 Ah cells is the absolute minimum capacity I am looking for as I will be charging 6 packs to get 12S at 7.5 to 9 Ah. Also that is a total of 54 cells.
Also if I get a box of 60 cells I could build 13S packs for better performance. I would then get 10 to 12 Ah. I would be running 52 cells. four rows of 13 for a single 13S pack. four rows of 13 in parallel series instead of three rows of six in series with three rows of six for 12S - 7.5 or 9 Ah. 36 cells total.
For charging I could parallel charge 48 cells at once but then would need a different charger for the other 4 cells. It would still probably be a good idea to charge each 6S pack seperate at least once every three or four charges just to keep each cell better balanced. I see why they make a 13S BMS. I guess they make 13S chargers also but probably very expensive. Thanks.
https://www.ebay.com/itm/1PC-6S-15A-24V-PCB-BMS-Protection-Board-Module-Cell-Battery-Lithium-Li-ion-18650/322845500708?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D2%26asc%3D49917%26meid%3D6ecf6ea4155f4710999a6aa7dd9c25ff%26pid%3D100005%26rk%3D1%26rkt%3D6%26sd%3D263384810784%26itm%3D322845500708&_trksid=p2047675.c100005.m1851
OK.
Walking to the beer store I thought of a better way to charge. I will need a few of these. Eight total unless they make a 6S BMS which can balance 24 cells. Then I would only need two. Eight is ridecelous. Four would work also. Each Balance charging 12 cells. I really see no sense in parallel balancing two or three cells togeather. It kind of defeats the purpose.
https://www.ebay.com/itm/LiPo-Charge-Adapter-Board-XT60-2-6S-Charger-Balance-Parallel-Connect-Plate-RC189/142687676322?epid=13016020857&hash=item2138d927a2:g:tesAAOSwAGhagPjk
The problem with balance charging is to many plugs to plug in and unplug. I guess eight BMS is the way to go. What sucks though is not being able to run 13S. I don't see how it could possibly be done without a 13S BMS and 13S charger both of which would be expensive.
LC out.
5:38 AM.
drinking of course. :lol:
Am looking over the post and 13S is impossible but 18S is possible. Probably not practical for a 36 or even 48V brushed motor. However the 48V 1,800W brushless motor.
I need to build three 18 cell - 6S packs. 7.5 to 9 Ah depending on the cells I get. I will need a minimum of 54 cells. A lot of 60 is what I need. I might have to go with 26650 cells. 3.5 times 18 equel 63V. I used 3.5V for voltage under heavy load. The 26650 cells are usually 3.3V discharged and 3.7V fully charged so I will use 3.5 to take SAG into consideration.
Either way three packs need building and then an the 48V brushless motor must be built. I think it would easier though to go with a voltage booster like wturber has and work with 12S as it is easier to build and charge than 13S and easier to find a controller. Either 52 or 54V is target voltage for 40 mph with the 1,800W 48V brushless motor.
He has not posted latley. Mabye he is making cowboy movies. He looks like a famous actor from Hollywood. I just cant place the name though. :lol: He seems like a good dude. I wish he would post and let me know the link for the voltage booster.