Search found 163 matches

by Headrc
Jan 07 2020 9:03pm
Forum: Items for Sale - New
Topic: Boston Power Batteries LOTS OF OPTIONS USA will ship International
Replies: 7
Views: 1773

Re: Best 18650 cell for 3s 18A max

Have you considered the Boston Power Swing batteries? They will surprise you for performance vs. cost. If interested check the posts in here on these batteries ...and yes I can supply them. But that is not the only reason I suggest them ...it is because they are a very good battery.
by Headrc
Dec 11 2019 10:53am
Forum: Battery Technology
Topic: Upcycled used LiIon Battery - NICKS
Replies: 4
Views: 778

Re: Upcycled used LiIon Battery - NICKS

If you don't want to pull the pack apart and put new shrink wrap on the cells....then you could possibly use Kapton tape on the damaged wrap.
by Headrc
Dec 08 2019 2:39pm
Forum: Resources & EV Related Parts and Services
Topic: New or Rebuilt Lithium-Ion Battery Service
Replies: 41
Views: 4609

Re: New or Rebuilt Lithium-Ion Battery Service

If he is shipping USPS priority ...I would bet the batteries are not labeled properly. USPS has now become very particular on the shipping of Lithium batteries, even if packaged properly and labeled properly. My local USPS will now refuse any Lithium battery shipment over 5 lbs. I do all my shipping...
by Headrc
Dec 03 2019 10:01am
Forum: Battery Technology
Topic: Boston-Power Swing 5300 Li-ion cell test
Replies: 129
Views: 19995

Re: Boston-Power Swing 5300 Li-ion cell test

The medical packs that I am familiar with are all Boston Power Sonata cells ...which have a lower discharge rate. If you read the marketing statement at the top of the Boston Power Swing 5300, you will see what they state the Swing is applicable to.

http://liionbms.com/pdf/bostonpower/swing5300.pdf
by Headrc
Dec 02 2019 9:07pm
Forum: Battery Technology
Topic: Boston-Power Swing 5300 Li-ion cell test
Replies: 129
Views: 19995

Re: Boston-Power Swing 5300 Li-ion cell test

Actually as I understand it ...BP Swing Cells were actually marketed to the auto industry. And those that I am familiar with using them for Ebikes have been happy and impressed with them.
by Headrc
Dec 02 2019 10:46am
Forum: Battery Technology
Topic: Where can I buy very large heat shrink tubing?
Replies: 5
Views: 1229

Re: Where can I buy very large heat shrink tubing?

Contact Keith with 18650shrink ..... off Ebay at 18650shrink@gmail.com . He has good pricing, gives great service and you will get it faster.
by Headrc
Dec 01 2019 9:30pm
Forum: Battery Technology
Topic: Boston-Power Swing 5300 Li-ion cell test
Replies: 129
Views: 19995

Re: Boston-Power Swing 5300 Li-ion cell test

I do not have any specific temp data ...all I have are folks who have used these for Ebikes and Scooters ...and no complaints about heating up or sag as long as the packs are built properly for the amount of current needed.
by Headrc
Dec 01 2019 2:23pm
Forum: Battery Technology
Topic: Boston-Power Swing 5300 Li-ion cell test
Replies: 129
Views: 19995

Re: Boston-Power Swing 5300 Li-ion cell test

According to the BP Swing 5300 spec sheet ....2C is maximum continuous discharge rate.

http://liionbms.com/pdf/bostonpower/swing5300.pdf
by Headrc
Oct 14 2019 9:10am
Forum: Battery Technology
Topic: Shipping batteries, or cheap alternative for benchtop testing?
Replies: 14
Views: 955

Re: Shipping batteries, or cheap alternative for benchtop testing?

Where are you located? And what is the capacity of the battery you are looking for? Richard
by Headrc
Oct 05 2019 12:28pm
Forum: Resources & EV Related Parts and Services
Topic: E-bike battery rebuilder - highly recommended
Replies: 1
Views: 531

Re: E-bike battery rebuilder - highly recommended

Thanks for those kind words Steve, I am glad we could get this working for you. Richard
by Headrc
Sep 29 2019 8:56am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1048
Views: 147165

Re: kWeld - "Next level" DIY battery spot welder

Always very well documented and challenging input Electricgod! Doing your best to live up to that name ...thanks...
by Headrc
Sep 23 2019 8:54am
Forum: E-Bike Technical
Topic: XLD Brainpower motor controller XunLiDa
Replies: 104
Views: 35691

Re: XLD Brainpower motor controller XunLiDa

Now looking at another throttle replacement brings a question ....does that lock/ignition wire get rid of the need for a battery cutoff switch if you have a throttle with an on/off switch? Meaning, instead of wiring the lock/ignition wire to positive, you wire it to the throttle's on/off wire and no...
by Headrc
Sep 22 2019 9:01pm
Forum: E-Bike Technical
Topic: XLD Brainpower motor controller XunLiDa
Replies: 104
Views: 35691

Re: XLD Brainpower motor controller XunLiDa

I found my problem ....it is the Chinese speed controller after all. One of leads on the diodes in the controller actually had a hairline crack on it ...I had to use a magnifying glass to see it. I put a 250k pot in place of the controller ...and while not optimum I could at least control the speed ...
by Headrc
Sep 22 2019 6:03pm
Forum: E-Bike Technical
Topic: XLD Brainpower motor controller XunLiDa
Replies: 104
Views: 35691

Re: XLD Brainpower motor controller XunLiDa

I am trying to wire up one of these motor controllers up too. I followed all the info here and the good news is the motor is running and running in the right direction. The bad news is the accelerator does not work at all, the motor just runs full on all the time. Checking the Chinese hand accelerat...
by Headrc
Sep 20 2019 7:49pm
Forum: Battery Technology
Topic: Adding a Key to battery pack ?
Replies: 15
Views: 1026

Re: Adding a Key to battery pack ?

I just purchased one of these and tested it under load today:

https://www.amazon.com/gp/product/B07MT ... UTF8&psc=1

All went well under load....so obviously the Flisky was not up to the task and did not meet its specifications.
by Headrc
Sep 20 2019 1:20pm
Forum: Battery Technology
Topic: Adding a Key to battery pack ?
Replies: 15
Views: 1026

Re: Adding a Key to battery pack ?

No sign of contacts burning ...and since the electronics are enclosed with black heat shrink I cannot see if there is visible evidence of a failed component. Obviously the switch is now closed, permanently passing voltage from the battery. And of course I am trying to get a response from the seller ...
by Headrc
Sep 19 2019 8:40pm
Forum: Battery Technology
Topic: Adding a Key to battery pack ?
Replies: 15
Views: 1026

Re: Adding a Key to battery pack ?

I mentioned it wrong ...it is a Flipsky switch ...similar to the Luna switch. Here is a link to one: https://www.amazon.com/Cigooxm-Flipsky-Electric-Skateboard-Scooter/dp/B07V5Y6NZ2 I wired it up yesterday and tested it just for battery on/off for a 7S battery and it worked fine. But as soon as I pu...
by Headrc
Sep 19 2019 9:40am
Forum: Battery Technology
Topic: Adding a Key to battery pack ?
Replies: 15
Views: 1026

Re: Adding a Key to battery pack ?

Tommycat ....are you actually using the Lunacycle remote switch? And all is well with it? I just tried one of the Flippy switches like this and it failed under load immediately after switching a 7S pack on.
by Headrc
Sep 19 2019 9:26am
Forum: Battery Technology
Topic: Boston-Power Swing 5300 Li-ion cell test
Replies: 129
Views: 19995

Re: Boston-Power Swing 5300 Li-ion cell test

Do you have a link for that vendor? Thanks!
by Headrc
Sep 18 2019 9:00am
Forum: Battery Technology
Topic: Boston-Power Swing 5300 Li-ion cell test
Replies: 129
Views: 19995

Re: Boston-Power Swing 5300 Li-ion cell test

Excellent install there ....where did you get those BP holders? And another actual user comment on these batteries ...thanks!
by Headrc
Sep 14 2019 9:34am
Forum: Battery Technology
Topic: Boston-Power Swing 5300 Li-ion cell test
Replies: 129
Views: 19995

Re: Boston-Power Swing 5300 Li-ion cell test

I value folks who do "consider the source" of technical specs ....and then spend the time to test those specs in a professional manner. It saves me time! So thank you for that ....and to others like Thunderheart who actually started this whole thread. Too many folks take marketing (like news) as the...
by Headrc
Sep 10 2019 8:50am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1048
Views: 147165

Re: kWeld - "Next level" DIY battery spot welder

I plan to give a more lengthy response at a later date on this ...primarily because I am still experimenting with my battery power for the Kweld. But I can state this ....the battery connections to the Kweld, including the internal ones on the battery itself are absolutely critical. That and the cab...
by Headrc
Sep 09 2019 10:26am
Forum: Battery Technology
Topic: upgrade battery for this bike? Possible?
Replies: 15
Views: 687

Re: upgrade battery for this bike? Possible?

Personally I would at least ask some folks in Europe what it would cost to recell the battery that comes with the bike. I would bet you stand a better chance of having a much better battery than sourcing yet another Chinese battery with who knows what kind of cells and current design they have built...
by Headrc
Sep 08 2019 9:56am
Forum: Battery Technology
Topic: upgrade battery for this bike? Possible?
Replies: 15
Views: 687

Re: upgrade battery for this bike? Possible?

I agree with Flippy. Another alternative would be to simply ask the seller about a battery upgrade.
by Headrc
Sep 05 2019 7:31pm
Forum: Battery Technology
Topic: Boston-Power Swing 5300 Li-ion cell test
Replies: 129
Views: 19995

Re: Boston-Power Swing 5300 Li-ion cell test

Totally agree Electricgod ...and never doubted your testing and views on what ES folks want out of batteries. So I am with you on that. And healthy critique/discussion on anything is always welcome in my neck of the woods.