Walmart Booster Batteries

Batteries, Chargers, and Battery Management Systems.
ecycler   10 kW

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Re: Mounting the Walmart Booster Batteries

Post by ecycler » Dec 20 2015 10:40am

I don't understand this Math. In the other thread you stated you paid $148 for the batteries and $12 for the warranty. Even if they last 10 bike rides before frying a cell or two - I am not sure how many times you are going to be able keep exchanging them until Walmart's computer system gets wise. I guess the point is that you will get your money back when they die their quick death except for the $12?
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Boyntonstu   10 kW

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Re: Mounting the Walmart Booster Batteries

Post by Boyntonstu » Dec 20 2015 5:04pm

ecycler wrote:I don't understand this Math. In the other thread you stated you paid $148 for the batteries and $12 for the warranty. Even if they last 10 bike rides before frying a cell or two - I am not sure how many times you are going to be able keep exchanging them until Walmart's computer system gets wise. I guess the point is that you will get your money back when they die their quick death except for the $12?
I guess the point is that you will get your money back when they die their quick death except for the $12? Yes.

Shipping was free and my total including $12 warranty was: Total $150.48

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Re: Mounting the Walmart Booster Batteries

Post by Pinesal » Dec 21 2015 12:42am

soooo, I am in the market for a new battery and I'D be willing to give these a shot. I can always return them to Walmart if it doesnt work right?

Could I feasibly buy 8 of these and make a 48v 24AH battery pack?

I own a watt meter and I'd post all my findings.

ecycler   10 kW

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Re: Mounting the Walmart Booster Batteries

Post by ecycler » Dec 21 2015 12:54am

Pinesal wrote: Could I feasibly buy 8 of these and make a 48v 24AH battery pack?
Nope. There is a 99% chance we are all wasting our time on discussing this. The whole point that every experienced member is trying to make in these three threads is that there is about a snowball's chance in hell that these things will deliver the rated specs under a typical ebike load for any reasonable number of cycles. There is the 1% chance they will deliver... which is why you could give it a shot and let us know, though! :wink:
Any grease is better than no grease.
The best exercises are the ones you enjoy doing.
I strongly prefer vehicles without doors.

Pinesal   100 W

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Re: Mounting the Walmart Booster Batteries

Post by Pinesal » Dec 21 2015 1:15am

ecycler wrote:
Pinesal wrote: Could I feasibly buy 8 of these and make a 48v 24AH battery pack?
Nope. There is a 99% chance we are all wasting our time on discussing this. The whole point that every experienced member is trying to make in these three threads is that there is about a snowball's chance in hell that these things will deliver the rated specs under a typical ebike load for any reasonable number of cycles. There is the 1% chance they will deliver... which is why you could give it a shot and let us know, though! :wink:
Thats cool. Would you, or somebody be willing to walk me through the process of connecting 8 of them together? I Understand basically what to do but I wouldn't know the best way to go about it.

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Re: Mounting the Walmart Booster Batteries

Post by markz » Dec 21 2015 1:53am

Thats right, the 600A on the sticker is about 600% higher then it really is. Batteries get smoking hot at 90A. Just look at the youtube geek review.

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Re: Mounting the Walmart Booster Batteries

Post by Pinesal » Dec 21 2015 1:57am

So, no?

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Chalo   100 GW

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Re: Mounting the Walmart Booster Batteries

Post by Chalo » Dec 21 2015 5:40am

Pinesal wrote:So, no?
If you don't know how to set up 8 batteries to do what you suggest, then you don't need to be messing around with high energy batteries. Instead, you need to read up.

Edit, because that wasn't very helpful:

If you already understand what 4S2P means in this case, you should focus on choosing wire gauge and connectors or terminals to fit your current (amp) requirements.
Last edited by Chalo on Dec 21 2015 1:56pm, edited 1 time in total.
This is to express my gratitude to Justin of Grin Technologies for his extraordinary measures to save this forum for the benefit of all.

Boyntonstu   10 kW

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Re: Mounting the Walmart Booster Batteries

Post by Boyntonstu » Dec 21 2015 7:38am

markz wrote:Thats right, the 600A on the sticker is about 600% higher then it really is. Batteries get smoking hot at 90A. Just look at the youtube geek review.
Have you seen 90A from your batteries?

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Re: Mounting the Walmart Booster Batteries

Post by 999zip999 » Dec 21 2015 11:28am

2.5ah with 2ah usable. Good luck keep posted. Save receipt.

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Alan B   100 GW

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Re: Mounting the Walmart Booster Batteries

Post by Alan B » Dec 21 2015 12:21pm

Given the size, how many 18650's will fit inside? maybe 6?? 3S2P? or just 3?

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Re: Mounting the Walmart Booster Batteries

Post by markz » Dec 21 2015 3:16pm

Boyntonstu wrote:
markz wrote:Thats right, the 600A on the sticker is about 600% higher then it really is. Batteries get smoking hot at 90A. Just look at the youtube geek review.
Have you seen 90A from your batteries?
LMFAO, its in the video you supplied!
My batteries will supply 300A or more, but they weren't from CrappyChinaMart!

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Re: Mounting the Walmart Booster Batteries

Post by DAND214 » Dec 21 2015 4:56pm

Pinesal wrote:soooo, I am in the market for a new battery and I'D be willing to give these a shot. I can always return them to Walmart if it doesnt work right?

Could I feasibly buy 8 of these and make a 48v 24AH battery pack?

I own a watt meter and I'd post all my findings.
Save your money. You really want a good pack not a messed up one that doesn't work. look here http://lunacycle.com/48v/
It might cost more up front but cheaper later. Even with a warranty from Walmart, you won't kill all at once and maybe get money back for only one. Then you are stuck with 7 useless bricks.

Dan

Boyntonstu   10 kW

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Re: Mounting the Walmart Booster Batteries

Post by Boyntonstu » Dec 24 2015 1:49pm

First run: PA 5.84 miles average speed 14.5 battery 51.1V > 47.6V.

Thus 12S at 4.26V > 3.96 V

Plenty of pep left after the ride.

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Re: Mounting the Walmart Booster Batteries

Post by ecycler » Dec 24 2015 2:22pm

Glad it worked for your needs on your first ride, but reporting the mileage and voltage drop tells us nothing about the energy provided by the batteries especially at such low speeds in a flat location. Get a cheap RC watt meter.
Any grease is better than no grease.
The best exercises are the ones you enjoy doing.
I strongly prefer vehicles without doors.

Boyntonstu   10 kW

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Re: Mounting the Walmart Booster Batteries

Post by Boyntonstu » Dec 24 2015 10:14pm

ecycler wrote:Glad it worked for your needs on your first ride, but reporting the mileage and voltage drop tells us nothing about the energy provided by the batteries especially at such low speeds in a flat location. Get a cheap RC watt meter.


"Glad it worked for your needs on your first ride". Thanks, it suits my needs.

I don't go for rides over 10 miles and If the packs last for 2 years, I will be satisfied and have the purchase price refunded.

I am 77 and my 26" mountain bike is difficult for me to pedal over 18 MPH.

My high gear is 13 teeth and it is a cadence problem not strength.

A few quick bursts with the motor to 25+ during a ride is a thrill.

What meter would you recommend to measure the Power?

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Re: Mounting the Walmart Booster Batteries

Post by bowlofsalad » Dec 25 2015 12:29am


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dogman dan   100 GW

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Re: Mounting the Walmart Booster Batteries

Post by dogman dan » Dec 25 2015 7:44am

Most likely he ran about 200watts on that ride at about 15 mph. So he used somewhere around 170 watt hours.

He damn sure better have pep left, after having used so little. If that's the typical ride length he needs, then he's going to be fine. He used about 4 ah. If he pedaled very hard, then he used less of course. No pedaling, he may have used up to 250watts.

So now we know they must put out close to 4 ah, but I'm still betting on it that the claim of 12 ah is pure bullshit. 8 ah capacity plausible though. Lets see what happens if you try for a 15 mile ride.


Both those watt meters appear the same to me, the cheaper one will be quite adequate.

Boyntonstu   10 kW

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Re: Mounting the Walmart Booster Batteries

Post by Boyntonstu » Dec 25 2015 9:03am

Is this cheap metr suitable?


http://www.ebay.com/itm/321890071368?_t ... EBIDX%3AIT

I am convinced that the 12Ah spec is way too optimistic.

A factual consideration for return.

I intend to have as much fun and exercise possible for my $12 investment.

I plan a 1 mile dash trip to the supermarket, using max throttle I will determine what the start speed and final speeds are.

My next step is to move the batteries to over the front wheel with the 4 headlights/flashers forward.

That should make a nice photo.

Boyntonstu   10 kW

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Max Speed Test and Charging Walmart Batteries

Post by Boyntonstu » Dec 26 2015 9:37am

I just returned from a 1 mile upwind and a 1 mile downwind speed trial.

Measured mile accuracy.

Upwind speed felt very strong to my face.

Upwind bike speed 25-27 MPH downwind 29.5 MPH (no pedalling)

Initial V 51.1 Final V 47.1.

I am impressed!

If my bike will go at over 20 MPH for 3 to 4 miles, it would make for a pretty good work commute bike with 4 12V wall chargers at home and at work.

I can pedal without power in the 10-12 MPH region.

They are being recharged with this set up:

Image

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Re: Mounting the Walmart Booster Batteries

Post by DAND214 » Dec 26 2015 4:28pm

eTrike wrote:Yes either that ebay or the GT meter should be fine. Wattsup is overpriced crap that in my opinion should be discontinued as they were substandard 8 years ago. I am biased though because I had a wattsup fail after a few months and the manufacturer refused to warranty.
Each t their own. Have a Wattsup for about the 8 years, which you said was bad and I had the one from Ebay and it died? Wattsup reads closer to my CA than the GT or the one from Ebay, which both read low? The only one I really trust is my CA.
In either case anything is better than nothing, at least you can have a base to work with.

Dan

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Re: Max Speed Test and Charging Walmart Batteries

Post by DAND214 » Dec 26 2015 4:55pm

WOW, 4 volt drop in two miles. I don't know what to say. If I used 4v in 2 miles that would really upset me. So 6 mile range or less?

Dan

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Re: Max Speed Test and Charging Walmart Batteries

Post by Boyntonstu » Dec 26 2015 4:59pm

DAND214 wrote:WOW, 4 volt drop in two miles. I don't know what to say. If I used 4v in 2 miles that would really upset me. So 6 mile range or less?

Dan
How many volts does your battery drop after 2 miles at 25+ mph?

What is the Ah rating of your battery?

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Re: Mounting the Walmart Booster Batteries

Post by markz » Dec 26 2015 8:29pm

I wanna know how people hook up their CA to do the readings (V and A, Ah, W etc)

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Re: Mounting the Walmart Booster Batteries

Post by markz » Dec 26 2015 11:31pm

There are 6 different models of CA.

CA-DP - V2.3 - Direct Plug-in Cycle Analyst, for Controllers with Direct Drive Hub Motors.
CA-DPS - V2.3 - Direct Plug-in Cycle Analyst with Speedometer Pickup, for Geared and Mid-Drive Motors.
CA-HC - V2.3 - High Current Cycle Analyst, with Ring Terminals for Remote Shunt.
CA-SA - V2.3 - Cycle Analyst with Stand Alone Shunt. For use with Conversion Systems that Don't Have 6-Pin CA-DP Plug.

CA3-DP - V3 - Direct Plug Cycle Analyst, for Controllers with Direct Drive Hub Motors.
CA3-DPS - V3 - Direct Plug-in Cycle Analyst with Speedometer Pickup, for Geared and Mid-Drive Motors.

I've got the CA3-DP for my Direct Drive MXUS 3000W V2. I will look into this, but those watt meters are $10 shipped, so real cheap, accuracy would vary.

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