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Walmart Booster Batteries

44 Whr is the figure quoted in several of the specs, and the weight also suggests no more than 3s 2p..IF they are 18650's ?
BUT, as i said, we cannot eliminate the possibility of them having pouch cells ( 3s, 4Ahr)
Independent tests have shown that these packs can supply 200+ amps in short pulses at least.....but fo how long , how many times, and what life it results in,...has never been shown.
I suspect they are 18650's , possibly the Samsung 22R type or similar which have a reputation for very high instantaneous amps.and could be bought for $5 each in bulk for these suppliers.
 
Hillhater said:
44 Whr is the figure quoted in several of the specs, and the weight also suggests no more than 3s 2p..IF they are 18650's ?
BUT, as i said, we cannot eliminate the possibility of them having pouch cells ( 3s, 4Ahr)
Independent tests have shown that these packs can supply 200+ amps in short pulses at least.....but fo how long , how many times, and what life it results in,...has never been shown.
I suspect they are 18650's , possibly the Samsung 22R type or similar which have a reputation for very high instantaneous amps.and could be bought for $5 each in bulk for these suppliers.
Click to expand...

My guess is that there are pouches in them ( 3s, 4Ahr) .

If there are 3 18650's in there, and if there is enough room, It may be useful to substitute 26650's.

BTW The Walmart Boosters seem to be getting stronger as time goes by.

I went 6 miles twice yesterday at 15 mph PA with a 2 hr charge between rides.

A heck of a lot of wind!

After the second ride the cells were at 4V. (48.1/12)

This performance meets my needs.
 
Thanks for the video.

If we could remove the 19v, 5V, and the LED components, we could possibly fit 12 18650;s in there for a 6A 12V device.

Just leave the BMS and the cells.

Nice!
 
Thanks alan, useful info in that video.
So, at least some of these jump starter packs are lipo pouches, but maybe not all ?
I just wish he had measured the apm pull on the car starter so we could see how strong the cells are.
 
I might have been tempted to buy a tested, reviewed unit.but !, Oddly, that Innori jump starter that was tested, doesnt seem to be available now. Amazon, Ebay , and even the Innori site doesnt list it anymore ?.
However there are many others of unknown ability and capacity ( some claiming 68,800 mAhrs ?) with pricing equally variable,... $30.....$300 !! :wink: :roll:
EDIT... I noticed HK have a unit with some specs to back it up..
3800 mAhr , 200 A starter current ( 400A for 3 secs, 100C ? )etc.. For $50 (Au $65)
...probably a safer bet !
http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=84985
 
Alan B said:
If we ask ourselves "what inexpensive small lithium battery packs can handle car starting current" the answer would seem to be pouch lipo. The 18650's don't have the low impedance needed to sustain these current levels in such a small pack.
Click to expand...

My bike does not require car starting Amps. 18650's are fine, even used laptop cells with their high impedance.

https://endless-sphere.com/forums/viewtopic.php?f=6&t=72408

[youtube]0imqks9QxTA[/youtube]
 
What are they 12V 3 to 3.5Ah at $15 each, with very low discharge.
If you want a ready to go package with warranty then Home Depot's got a selection as well.

56V 2Ah https://www.homedepot.ca/en/home/p.56-volt-20-ah-battery.1000787134.html
56V 4Ah https://www.homedepot.ca/en/home/p.56-volt-40-ah-battery.1000787508.html
58V 4Ah https://www.homedepot.ca/en/home/p.58v-4ah-battery.1000826557.html
18V (x4) ?1.3?Ah https://www.homedepot.ca/en/home/p.18v-one-compact-lithium-ion-battery-four-pack.1000844176.html
40V 1.5Ah https://www.homedepot.ca/en/home/p.40v-slim-battery.1000784403.html
48V ?Ah https://www.homedepot.ca/en/home/p.replacement-battery---48-volt.1000744022.html
40V ?Ah https://www.homedepot.ca/en/home/p.40v-battery.1000744396.html
40V 4Ah https://www.homedepot.ca/en/home/p.ion-40-volt-ecosharp-lithium-ion-battery.1000788293.html
 
markz said:
What are they 12V 3 to 3.5Ah at $15 each, with very low discharge.
Click to expand...

If they were low discharge rate batteries, they wouldn't start a car. So please explain what you mean.
 
nutspecial said:
Technically they're 4ah HIGH discharge, and sounds like 60$ for 48v with no questions asked wallanty.
Click to expand...

$60 for 24V (actually nominal 22.2V) if you check the link. At $0.68 per watt hour including charger and some amount of BMS, they're not a bad deal if they last.
 
$60 for 24V (actually nominal 22.2V) if you check the link. At $0.68 per watt hour including charger and some amount of BMS, they're not a bad deal if they last.
Click to expand...

Yep thanks, I misunderstood and didn't check the link. $60 for 48v would be ridiculous I guess @ under HK bare lipo price on 12s 4ah. The only downside imo could be physical integration(and size?) and making a charge harness for 1 larger charger, or using 4 separate chargers.

Boyntonstu, I'm guessing you separate the packs to charge?
 
nutspecial said:
$60 for 24V (actually nominal 22.2V) if you check the link. At $0.68 per watt hour including charger and some amount of BMS, they're not a bad deal if they last.
Click to expand...

Yep thanks, I misunderstood and didn't check the link. $60 for 48v would be ridiculous I guess @ under HK bare lipo price on 12s 4ah. The only downside imo could be physical integration(and size?) and making a charge harness for 1 larger charger, or using 4 separate chargers.

Boyntonstu, I'm guessing you separate the packs to charge?
Click to expand...


At 0:50 you will see the 4 chargers. Each 12V booster has its own BMS,

[youtube]dkVlMlWfgD4[/youtube]
 
nutspecial said:
$60 for 24V (actually nominal 22.2V) if you check the link. At $0.68 per watt hour including charger and some amount of BMS, they're not a bad deal if they last.
Click to expand...

Yep thanks, I misunderstood and didn't check the link. $60 for 48v would be ridiculous I guess @ under HK bare lipo price on 12s 4ah. ?
Click to expand...
Similar units that have been reviewed and inspected, revealed they were a 3S pack of 3.8-4.0 Ahr lipo pouches rated at 40C.
Be careful not to confuse them with the similar looking "powerbank" units which do not have the same construction or high discharge cells.
 
Someone should crack this Booster battery open and see whats inside.
Unfortunately these are not available on Walmart.ca's website.
If they are high discharge then they should never get hot!
I dont know if it was this battery or another, but someone did a youtube video on a similar product and it got real hot.

I did find some drill batteries that Walmart was selling on sale for $5, 12V and ~2Ah or under but that was a one-store-wonder.
 
markz said:
Someone should crack this Booster battery open and see whats inside.
Unfortunately these are not available on Walmart.ca's website.
If they are high discharge then they should never get hot!
I dont know if it was this battery or another, but someone did a youtube video on a similar product and it got real hot.

I did find some drill batteries that Walmart was selling on sale for $5, 12V and ~2Ah or under but that was a one-store-wonder.
Click to expand...
Walmart is now selling them for $30 each in 2 packs.

(Don't forget the $3 each warranty)

http://www.walmart.com/ip/Everstart-Multi-function-Jump-Starter-Battery-Charger-2-Pack-Savings-Bundle/47971609
 
At 0:50 you will see the 4 chargers. Each 12V booster has its own BMS
Click to expand...
Thankyou, and the helpful nature and effort to make good videos you take is greatly appreciated. The timer integration and manipulation is a handy tip!
I'm not up on specifics of bms'd packs, and am still unclear on the charging. Can they be charged while in series for the 48v? Additionally, was it difficult to make a harness for series connection?
Thanks, Jay.
 
nutspecial said:
At 0:50 you will see the 4 chargers. Each 12V booster has its own BMS
Click to expand...
Thankyou, and the helpful nature and effort to make good videos you take is greatly appreciated. The timer integration and manipulation is a handy tip!
I'm not up on specifics of bms'd packs, and am still unclear on the charging. Can they be charged while in series for the 48v? Additionally, was it difficult to make a harness for series connection?
Thanks, Jay.
Click to expand...

Thank you.

Excellent questions.

Since each 12V Booster is individually charged, it does not matter how many are in series.

As to wiring them, the key is using these plug-in connectors: http://www.ebay.com/itm/321872610035?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT
 
So IF these are high discharge, that means you can jump start back to back batteries with looooong battery pulls and the unit will not get hot. Somehow I doubt that with these units. They are only made to maybe do a short pull, and recharge.....which means they would be low discharge batteries.
 
markz said:
So IF these are high discharge, that means you can jump start back to back batteries with looooong battery pulls and the unit will not get hot. Somehow I doubt that with these units. They are only made to maybe do a short pull, and recharge.....which means they would be low discharge batteries.
Click to expand...

When I use them on my bike it is a very low discharge rate compared to starting a car.
 
markz said:
Someone should crack this Booster battery open and see whats inside.
Unfortunately these are not available on Walmart.ca's website.
If they are high discharge then they should never get hot!
.......They are only made to maybe do a short pull, and recharge.....which means they would be low discharge batteries.
.
Click to expand...
..I guess it depends on your definition of high discharge !
If a 4-6Ahr pack can jump start a car,...thats high discharge rate in my world.
Its a fair bet they will be the same 3S , 40C , lipo cells.
If used as intended, a few sec at high discharge and then left for hours...days..weeks, then they will last a long time and could do that several times before needing a recharge.
Used on an Ebike with10-20 amp discharge they shouldnt even get warm.
 
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