Wow Mike, that is an awesome link!! They have what sounds like a heckva deal on
12.8v 6.6ah 84wh Lifepo4 module with 40a BMS for only 30 bucks ea! This would
give me a 52V 26+ ahr pack for my friends wheelstander. Problem is I don't know
anything about Lifepo4, is it similar to Li-Ion? Would these give me the high
current I am looking for for the 48v 1000watt Currie motor? This is a direct
drive scoot and I am OK with breaking the gearbox, LOL. I already told him we
would probably have to machine a new motor mount and install a freewheel and
sprocket on the rear. Thanks again for the awesome link!! Just goes to show yet
again that all of us are smarter than any some of us! Dach.
"Do what you can, with what you have, where you are" - Theodore Roosevelt
On Tuesday, December 8, 2020, 7:27:04 PM MST, Mike Shipway via EV
<[email protected]> wrote:
Take a look at https://batteryhookup.com/
They have a constantly changing selection of surplus, factory 2nds and
"where did they find those" batteries.
On Tue, Dec 8, 2020 at 3:09 AM Rod Hower via EV <[email protected]> wrote:
> I bought these on Amazon last year, but they are now sold on Ebay,
> https://www.ebay.com/itm/5000mAh-Li-ion-26650-Rechargeable-Battery-High-Drain-w-Charger-for-Flashlight/303600483209?hash=item46afffbb89:g:oUAAAOSwGypftkrD
>
> Every battery I tested was over the 5000mAhr rating using this,
> https://www.amazon.com/Universal-Analyzer-Rechargeable-Batteries-BT-C3400/dp/B07T941JCF/ref=sr_1_4?dchild=1&keywords=BT-C3400+Universal+Battery+Charger+Analyzer+Tester+for+Li-ion&qid=1607368205&sr=8-4
>
> Most of the 18650 batteries I tested with the same analyzer were far below
> their rated Ahr (except for Panasonic).
> On Monday, December 7, 2020, 02:47:18 AM EST, EVDL Administrator via
> EV <[email protected]> wrote:
>
> I'm far from an expert on this, so I invite corrections to the following.
>
> First, on DIYing lithium batteries. I don't. I don't have the equipment,
> or the skills, or the steady hands and good eyes that it takes. And there
> is a LOT of power in those little cells. Maybe you'd be fine with it,
> I'm
> just saying - think about it.
>
> In the few cases when I've used lithium batteries, I've bought them fully
> assembled and tested. Yep, it's expensive for good ones, but so is the
> deductible on my homeowner's insurance.
>
> As for buying lithium batteries on Ebay, I'd suggest being really
> careful.
> I've read that a significant number of the cheap ones are made with
> recycled
> cells from old laptop batteries.
>
> I've had good luck with Ping batteries, ordered directly from China at eye-
> popping shipping costs, though not so much with their cheapo chargers.
> But
> they're not high power batteries, so they might not work for your friend.
>
> You might try cruising the ebike forums at endless-sphere.com. I haven't
> been there in several years, but last time I was, they were well populated
> by need-for-speed people with glowing eyes like your neighbor has. :-)
>
> In any case, best of luck with the project.
>
> David Roden, EVDL moderator & general lackey
>
> To reach me, don't reply to this message; I won't get it. Use my
> offlist address here : http://evdl.org/help/index.html#supt
>
> = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
> Human history more and more becomes a race between education
> and catastrophe.
>
> -- H G Wells
> = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
>
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--
*Michael Shipway *
[email protected]
(301) 237-5563
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