Cheap LiFePo4 on ebay

[ty cohen]

you should edit your first post to clarify. People might only see that and be influenced.

Good idea!!!

There ... I edited my first post just to make sure.

wow, I just meant to change the name. But that should work too.

+1 :lol:

I think someone else on the forum bought a jimmywu66 battery recently. I mistakenly pegged the buyer as jimmywu66 himself and had to correct myself too, but not in the same fashion as you

I'd like to hear about how jimmywu66's batteries test out too. He's actually sold quite a few lifepo4's already.

 

[mrhat24]

Five days after I paid I emailed jimmywuu to ask for some kind of shipping confirmation. He said "I will make it in several days. Will let you know shipping info after its done." WHAT THE HELL???? So I basicly paid all that shipping moeny so he can sit on his sweet ass & take his time on making the battery. Don't buy it from this ass people. On another note I just got my Goldenmotor hub today it only took them 10 days. So I guess I have to wait 2 more weeks for the battery to arrive while my hub motor is sitting here all lonlely and shiny. Also, I ordered a 48v controller from goldenmotor. How do I know its 48v since it doesn't have any kind of label on it. It looks xactly the same as the 36v controller. They did include a 48v charger with a picture of a scooter on the box of the charger so I assuming the controller is 48v also. I just want to make sure since sombody on here got a 36v accidently and he ran 48v battery on it and it messed up the controller. Anyway I'll update about the battery when i GET IT.

Just curious, why did they give me a charger when I didn't buy a battery from them? Will this charger work with other lithium batteries if I connect it?

 

[dogman dan]

It's basicly the same thing everybody does in this modern world, the product is not made till it's allready sold. The cheap price is mainly because you are getting it allmost straight from the factory. In the past you would have had to buy in huge lots to get that price. The wait for me for a Ping was about the same. It seemed like a year to me too, since at the time I was using batteries that ran out about five miles from home, uphill. Let us know all about the battery itself when it comes. That is how we learned what Pings batteries could do and couldn't do. So please keep us posted on a new thread how the Jimmywu battery performs. In general sla chargers can charge Lifepo4, but not other lithiums. It will undercharge them about one volt, but it seems ok, I cooked my ping charger a month ago and my battery is still balanced ok. Like the lead batteries, the lifepo4 will not develop its full charge on the first time. It will develop ability to hold it's full capacity after several discharge recharge cycles, so expect a few short range rides at first. For my Ping, it was about 4 or 5 charges.

 

[chessir]

Five days after I paid I emailed jimmywuu to ask for some kind of shipping confirmation. He said "I will make it in several days. Will let you know shipping info after its done." WHAT THE HELL???? So I basicly paid all that shipping moeny so he can sit on his sweet ass & take his time on making the battery. Don't buy it from this ass people. On another note I just got my Goldenmotor hub today it only took them 10 days. So I guess I have to wait 2 more weeks for the battery to arrive while my hub motor is sitting here all lonlely and shiny. Also, I ordered a 48v controller from goldenmotor. How do I know its 48v since it doesn't have any kind of label on it. It looks xactly the same as the 36v controller. They did include a 48v charger with a picture of a scooter on the box of the charger so I assuming the controller is 48v also. I just want to make sure since sombody on here got a 36v accidently and he ran 48v battery on it and it messed up the controller. Anyway I'll update about the battery when i GET IT.

Just curious, why did they give me a charger when I didn't buy a battery from them? Will this charger work with other lithium batteries if I connect it?

My single purchase (24v/4amp charger) with Goldenmotor was a disaster. Philip Yao from goldenmotor admitted in Paypal resolution he overlooked my purchase. He subsequently sends me a 36v/2amp charger stating they were out of stock on 24V charger.
I told him I couldn't use the 36V charger since i need 24V and to give me a full refund. I get no reply back and Paypal rules in favor of Goldenmotor- "talk about a kangaroo court" especially since all the time they were out of STOCK they kept advertising the 24V/4amp lithium charger for sale on the goldenmotor website (very nefarious). Buyer Beware!!!!

 

[ping]

Just explain how we are selling batteries.

On ebay - We always follow ebay rules. That means all our battery packs listed on ebay are finished and tested in stock. As what we say in our ebay pages, all of them will be shipped within 2 working days right after payment received. Of course, if buyers want to change dimensions, that will cost more time. We've never delayed shipping ebay items except in May EMS suddenly stopped shipping. Finally, we used UPS and paid more for these battery packs.

Outside ebay - We build packs after receiving orders and payment. That's why you could get lower price. Although we haven't buy it now listed on ebay now, if we have, our buy it now price on ebay will be definately higher than the direct sale price. The difference will be more than ebay fees. Lead time of direct sale packs is about 1 week to 2 weeks, based on how many orders we have received. We always tell buyers lead time and other details before they send payment.

 

[ZapPat]

Just explain how we are selling batteries.

On ebay - We always follow ebay rules. That means all our battery packs listed on ebay are finished and tested in stock. As what we say in our ebay pages, all of them will be shipped within 2 working days right after payment received. Of course, if buyers want to change dimensions, that will cost more time. We've never delayed shipping ebay items except in May EMS suddenly stopped shipping. Finally, we used UPS and paid more for these battery packs.

Outside ebay - We build packs after receiving orders and payment. That's why you could get lower price. Although we haven't buy it now listed on ebay now, if we have, our buy it now price on ebay will be definately higher than the direct sale price. The difference will be more than ebay fees. Lead time of direct sale packs is about 1 week to 2 weeks, based on how many orders we have received. We always tell buyers lead time and other details before they send payment.

I must add that Ping has always been very clear and truthfull in his communications, and lets you know of all sale terms in advance just as he says here. Great to deal with! 8)

 

[dogman dan]

My experience too. Ping is the man to deal with for inexpensive Lifepo4. I haven't seen too many posts that showed his product had any problems that weren't caused by the owner, and I was told when to expect my battery. It hit my doorstep within 6 hours of when Ping pridicted its delivery.

People need to realize that the discharge rate needs to fit thier bike though, so they don't have bms cutouts or burn out the battery early. I keep on pounding, get the 20 ah size, since in the US at least, we all bought pretty big motors. All I have is the stock WE BD36, and I was nervous at first that even the 20 ah would be too small. At peak output going up a hill, my stock setup can put out over a thousand watts. So you folks with 100 amp controllers need to think before you buy a battery rated to discharge 20 amps.

 

[Malenfant]

I catched a 48v/10aH from Jimmywu66. After the 20AH battery was too much capacity, bulky and heavy i´ll gamble with Jimmywu66. Let´s see how they are working with my 406. I think it should be ok for 255$ :lol:

 

[dogman dan]

No such thing as too much capacity, but for some bikes, carrying 20ah is a tight fit compared to a nicad or nimh they were used to. I came from sla's so my battery was exactly the same size and 25 pounds lighter. Small scooters especially will have a problem with a 20ah fitting in the compartment. Jimmywu looked to have the best of the others to me. Those ones with 10 amp discharge were not going to cut it for a bike over 200 watts. If you have the 20 amp controller you may find it just fine. Do keep us posted on how it does. Especially if you have big hills on the daily ride, that is where the poop hits the propeller for most of us when the battery is too small .

 

[mrhat24]

I catched a 48v/10aH from Jimmywu66. After the 20AH battery was too much capacity, bulky and heavy i´ll gamble with Jimmywu66. Let´s see how they are working with my 406. I think it should be ok for 255$ :lol:

$255???? I paid $520 (shipping included) total for mine from Jimmywu66 for a 48v 10A. How did you get such a big discount?

 

[Malenfant]

I think it was ebay-luck :lol:. Maybe it´s because Jimmywu didn´t look when it´s a good time to let these auctions finish. In my case it finished at 9 o´clock in the morning (CET).
http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&rd=1&item=290249938037&ssPageName=STRK:MEWN:IT&ih=019

If you have the 20 amp controller you may find it just fine. Do keep us posted on how it does.

In my case i don´t have any big hills arround here. I just need the bike to get me to work and back home again (2x10km / 2x6miles). I hope for that job the 48/v10Ah is okay. The setup is pretty light (23,5kg + 87kg / Crystalyte 408 (Rear), Crystalyte 20A pedal-first contr.) and i never had any problems with my old heavy 20AH ducttape lifepo, so i think (or hope) the 10-20A is enough. I will let you know how it works!

 

[dogman dan]

Yup, you would not likely have had any problem with the 20ah ducttape battery. 20 amps for that would be easy since each pouch in the cell can put out 5 amps. With a big ol 50 amp controller, your sitiuation would be much different. My ride, and the size of the town in general, means I need every watt of my 20 ah Ping.

 

[ty cohen]

I catched a 48v/10aH from Jimmywu66. After the 20AH battery was too much capacity, bulky and heavy i´ll gamble with Jimmywu66. Let´s see how they are working with my 406. I think it should be ok for 255$ :lol:

$255???? I paid $520 (shipping included) total for mine from Jimmywu66 for a 48v 10A. How did you get such a big discount?

jimmywu66 seems to be selling quite alot of these lifepo4 batteries - 26 in the last two weeks !!!

Hopefully some of those buyers are forum members and are willing to share some of the battery's performance on the board.

 

[Gchassi]

Hi,

I've baught a 48V/15AH battery to Jimmywu66,
I live in FRANCE, i've received the battery 2 days ago, only 7 days after the order completed
I use it with a hub motor 408, a 15Ah controller.
Good communication with Jimmywu66, quickly answsers to my questions.

About the BMS, i've noticed that the MOSFET are very very hot, (overheating ?), but Jimmywu66 wrote me I do not have to worry, it is normal.

For this moment, i enjoy this battery :wink:

 

[dogman dan]

The bms will get warm, and pretty hot when the pack is balancing during charging at the end of the charging. Putting the bms where it can get some air is good. I taped mine to the battery with some spacers so the air could get underneath too. I'm glad you like the battery. I thought jimmywu had the only one that might be any good besides Ping. As long as the controller is not to high powered you should be ok. I just didn't like the idea of so many connections using the little cells. The Pings will be more reliable in my opinion, but only time will tell. I have a thousand miles on my Ping now.

 

[Gchassi]

In fact, the BMS (mosfet) overheat when discharging, ridding my bike even after only 1 mile.
I use a 15A controller, and i've checked that the controller never need more than 15A, most of time, only 11A

When ridding my bike, i let the bag open where i'v put the battery

So is it normal ?

 

[dogman dan]

Not for a Ping battery. The bms will get warm discharging, but not hot. Only when balancing does it get really hot, as it partially discharges the cells for another go.

Oh well. Thanks for the feedback though! It needs to be spread around which vendors to trust and which not. Maybe it is normal for his bms, but I suspect something will smoke eventually if it stays that hot continuously. According to his specs, 15 amps should be ok. Any others out there with one of these? Does the BMS get hot?

 

[recumbent]

Hi,
I've baught a 48V/15AH battery
About the BMS, i've noticed that the MOSFET are very very hot, (overheating ?), but Jimmywu66 wrote me I do not have to worry, it is normal.
For this moment, i enjoy this battery :wink:

For comparison, my 48V-12ah LIFEPO4 never gets hot, and often peak over 1500 watts with my 35 amp controller.

Although BMS circuits are designed differently, "very hot" is always a concern and most likely needs ventilation.

Enjoy the ride, I'm totally addicted.

 

[leamcorp]

I got one of his 36v, 15ah battery. I wrote while back about getting a wrong battery from him (mine went to someone else in US). This was ironed out and we exchange the battery. Here's my experience,

1) got the 48v, 20ah battery and tested - the BMS got super hot... Hot enough to melt the sheeting. But in his defense, I think some of the cabling was damaged from shipping (wires were loose/out from BMS pins). Started working with Jimmy to get it fixed and he told me its a wrong battery. Told the right buyer what happened.

2) exchanged for right battery - 36v, 15ah ( I didn't know what all these meant till later). The BMS didn't get hot or even warm. Using BL36?, its drawing 20-25ah with some 30+ for short duration.

At this volt, top speed is about 21-22mph. My commute is only 6-7 miles, so don't know anything about its range.

I've just ordered another battery from him - with some custom wiring (for 2 sided mounting) at 48v, 20ah (still waiting). I hope I don't get hot BMS issue and hopefully buyer who bought that got it sorted out. I don't know what others experience has been, but he was straight with me. It does take several emails and/or clarification (need to speak pidgin english) for him to get your point but I had that experience with pretty much all Chinese vendors.

Let me know if you need me to test anything from my 36v 15ah pack.

 

[dogman dan]

I guess for some vendors, the BMS will be just like the chargers. Replace as many as it takes to get a good one. But at the prices we're paying from these vendors it can be well worth it.

Thanks for the report, I was really wondering if the amp output of this type of battery cells would be ok or not. Sounds like they don't have cut out problems like some smaller ones have had. Just like the lead batteries, there can be a lot of variation in the capability of different types of cells.

But I think we know for sure, Ping is easier to work and communicate with. We won't know how these different types pan out untill we ride 10 or 20,000 miles on em. Bench tests are great, but still don't replicate years of bashing around on the back of the bike. For me, I was really pushing the limits for sla's on my daily commute so I expect I wouldn't have gotten much more than 150 cycles out of a set of sla's, which to be big enough to make it, would have cost $350 including shipping. Since that was not much less than the cost of my Ping, all I need is 3,000 miles to start riding on a free battery. I'm a third of the way there now, and even if it had cost more, the convenience and light weight of the Lifepo4 would be worth whatever the cost.

I guess what I'm trying to say is, even if some of these early, inexpensive lifepo4's don't go 1000 cycles, they are still worth thier cost if they can just go 300 with less hassle and weight than lead. For me and all the others who have a hill to climb, slas were just too heavy to go up that grade. I suspect even the worst of the duct tape type packs will go 300 cycles.

 

[leamcorp]

For me, not having to charge after each ride was main factor for choosing Lifepo4. Really, if you have to charge after each ride, the practicality of Ebike is greatly reduced - enough to not ride in certain occasions. Sure its great if you just go from point A to B. But what if your ride is similar to your car driving habit - going from point A to point B, then have coffee, then to C, talk to friend and some lunch, etc.

And since I don't "really" have to recharge after a short ride, I bought much larger capacity than I needed - so that I could go for several short rides without charging each time. I will charge it when I can, but now I don't have to be anal about it.

I agree - for such a low cost, who cares what cell its made of. As long as I can get 2 or 3 seasons and not crap out on the hills, I'll be happy.

 

[rguy56]

Oh, boy.

I couldn't wait to post to tell you all about 2-48v 20ah lifepos I got from jimmywuu66.

It has been terrible!

I bought the batteries on a best offer, and clearly quoted on the offer that it was inclusive of shipping. Jimmywuu66, predictably accepted the offer and added shipping anyway.

The batteries arrived about 7 weeks later, packed in the thinnest bubble wrap I've ever seen, covered by manila paper covered by clear tape, and with a pink plastic ribbon around it so it could be carried without ripping the packing. The first noticable problem was that one of the two rechargers was smashed. That should have worried me, because a charger is much more robust than these lifepo4 batteries, and they were packed and handled in the same manner, side-by-side.

I alternately charged the two batteries for days each, and then wired one into my current ride...NO power...hmmm...Tried the second one...nothing. Neither battery works. One battery after full charge shows 48.3v. only, and the other, 51.3. Neither one of those figures sounds right.

However, they reach their full glory when they're under load. I've tried them on 3 different controller/motor setups, and when connected they're producing 1.6 to 1.7v. I had planned to measure amps with a jig I had set up, but if the batteries are crud, they're crud...

I've been in correspondence with Lau/Jimmywuu66, and have made requests of him to honor his published 1 year warantee, and he simply WILL NOT HONOR IT. I've asked for his choice of repair, replacement, or refund, but he refuses to do any of these things.

You will probably get lucky and get a working battery, but if you aren't lucky, YOU AREN"T GOING TO GET ANY SERVICE. Sorry!

If I knew then what I know now, I would have happily purchased a Ping.

 

[dogman dan]

That is totally bogus. Have you tried bypassing the bms or anything yet. I suppose not since you would like to get a warranty replacement. I was a bit suprised how little protection my Ping had in shipping, but obviously it did not go through what yours did on the way. Hopefullly you can at least get some money back from Pay Pal.

 

[Ypedal]

Well.. i know how you feel *( really.. !!! i do !! trust me on that one ! )

Time to do the best you can with what you got..

1.7v reading is a tripped BMS, either you have a faulty BMS or have a battery problem that the BMS is preventing you from using it.. only way to know is to open it up.

Time to clean the tabletop !!! remove the jewelry, wear safey glasses and rubber gloves and put away the beer !!!! ( have video camera on hand for good youtube clips !! )

 

[recumbent]

Well.. i know how you feel *( really.. !!! i do !! trust me on that one ! )
Time to do the best you can with what you got.... only way to know is to open it up.

Yep, I'm also having trouble getting 8ah from my original 12ah pack. This is after using it for 2,000 km's (1,500 miles)
I can't wait to get a good quality BMS on the market to balance our cells properly.

Most of us cannot get the advertised Amp Hour ratings from our LIFEPO4 cells. These batteries and thier BMS circuits are not nearly perfected yet, unfortunately.