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Author Topic: Unwanted defective handheld batteries  (Read 1076 times)

Offline Bobbych

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Unwanted defective handheld batteries
« on: March 19, 2020, 06:44:36 PM »
Hi

I'm looking for sources of defective battery packs.

These are recycled by strippingand the battery cells  used to create small solar power banks for rural communities in underdeveloped countries.


Online ryevac

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Re: Unwanted defective handheld batteries
« Reply #1 on: March 20, 2020, 11:08:02 AM »
How are you involved in this, ?

"create small solar power banks for rural communities in underdeveloped countries."
The only way to fail is not to try.

Offline Bobbych

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Re: Unwanted defective handheld batteries
« Reply #2 on: March 20, 2020, 11:46:34 AM »
I strip the cells out of the batteries. Test them then ship them to a collegue who is in the military and is helping NGOs to help rural commuities. Mostly  the BMS in the Pack is faulty so all the Cells(6) are fine. Now and again I found 1 bad cell which kills the Pack but the other 5 cells are fine.

Online MVacs

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Re: Unwanted defective handheld batteries
« Reply #3 on: March 20, 2020, 06:47:01 PM »
If I know you want them ongoing, I'm happy to save them up and send you them in say 20's or 25s if you cover the 10 P&P cost. Better than them going to landfill.


Online ryevac

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Re: Unwanted defective handheld batteries
« Reply #4 on: March 22, 2020, 01:34:00 AM »
 :thumbsup:
The only way to fail is not to try.

Offline Bobbych

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Re: Unwanted defective handheld batteries
« Reply #5 on: March 22, 2020, 02:53:56 AM »
Yes I would gladly take any packs you have. My colleague will cover the P+P so please send as many as you can for the 10. Hopefully and of tour fellow Vac repair counterparts can do the same. As you say better than land fill and going to a good cause.

Offline Parwaz7862

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Re: Unwanted defective handheld batteries
« Reply #6 on: March 22, 2020, 04:56:45 AM »
I strip the cells out of the batteries. Test them then ship them to a collegue who is in the military and is helping NGOs to help rural commuities. Mostly  the BMS in the Pack is faulty so all the Cells(6) are fine. Now and again I found 1 bad cell which kills the Pack but the other 5 cells are fine.

What are BMS?
DC14s are tanks, just need a slightly longer motor life. Do plastic parts often break on DC14s? Nope. DC41- Sexy looking futuristic and powerful machine. Just needs a better designed cleaner head wheel and cyclone clip along with a dense metal rod in the chassis.

Offline Bobbych

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Re: Unwanted defective handheld batteries
« Reply #7 on: March 22, 2020, 05:47:56 AM »
Battery Management System. It's a circuit board that controls the rate and level of charge and discharge. Every rechargeable device has one.

Offline Parwaz7862

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Re: Unwanted defective handheld batteries
« Reply #8 on: March 22, 2020, 07:16:53 PM »
That's interesting, I always thought it was the batteries!
DC14s are tanks, just need a slightly longer motor life. Do plastic parts often break on DC14s? Nope. DC41- Sexy looking futuristic and powerful machine. Just needs a better designed cleaner head wheel and cyclone clip along with a dense metal rod in the chassis.

Offline Bobbych

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Re: Unwanted defective handheld batteries
« Reply #9 on: March 22, 2020, 07:24:11 PM »
I have stripped more that 300 dyson batteries. That is 1800  cells and only binned about 10. All others were useful. They did not have full original capacity but about 80% which can be used.

Online ryevac

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Re: Unwanted defective handheld batteries
« Reply #10 on: March 22, 2020, 11:52:48 PM »
Yes - i too have only ever had one cell at fault on a stripped battery.
I and the other lads use the cells on our fenix cree fishing lamps, fenix use the cells with no pronounced nipples on the + terminal.
Best i have found so far are 2200ma samsung cells.
The only way to fail is not to try.

Offline Bobbych

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Re: Unwanted defective handheld batteries
« Reply #11 on: March 23, 2020, 01:49:10 AM »
The V8 packs have 21700 cells, not 18650. There are 3000mAh.

Offline Parwaz7862

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Re: Unwanted defective handheld batteries
« Reply #12 on: March 23, 2020, 04:09:27 AM »
So would the vacuum run if you disable the BMS and just have the cells connected to the vacuum?
DC14s are tanks, just need a slightly longer motor life. Do plastic parts often break on DC14s? Nope. DC41- Sexy looking futuristic and powerful machine. Just needs a better designed cleaner head wheel and cyclone clip along with a dense metal rod in the chassis.

Offline Bobbych

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Re: Unwanted defective handheld batteries
« Reply #13 on: March 23, 2020, 08:51:52 AM »
NO NO & NO again. You should never use litium batteries without a BMS. The BMS prevents over charging and over discharging. If you over charge cells they can explode and catch fire.

Offline Parwaz7862

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Re: Unwanted defective handheld batteries
« Reply #14 on: March 23, 2020, 06:08:26 PM »
Got it 👍🏽
DC14s are tanks, just need a slightly longer motor life. Do plastic parts often break on DC14s? Nope. DC41- Sexy looking futuristic and powerful machine. Just needs a better designed cleaner head wheel and cyclone clip along with a dense metal rod in the chassis.

 

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