docnjoj
1 GW
Thats about the same as a Ping pack with the Live Search rebate!
otherDoc
otherDoc
More LiFePO4.... Free_shopping88....????
- Thread starter Patriot
- Start date
Ben
100 W
dnmun
1 PW
you can test that idea by just putting a jumper across the output fets on the BMS pcb. solder a wire to motor side of the shunt over to the battery negative, or just connect the motor negative to the battery negative terminal, you lose the LVC but can still charge normally.
dogman dan
1 PW
Just go to the new Pingbattery website. There are too many dud 18650 packs out there. Ping uses prismatic cells so the pack has fewer connections, no spot welds. I bounce the crap outta my ping pack for 30 miles a day with no problems.
dontsendbubbamail
10 kW
- Joined
- May 28, 2008
- Messages
- 718
Bubba has one of those dud 18650 packs. There are several sellers of lifep04 packs on ebay. They all look to me to be coming from the same source that Lau Chan aka jimmywu uses. There is a high probability that you will have trouble with a 18650 pack from China. Even if you find a seller that honors a warranty, you will eat up any cost savings in shipping costs on warranty returns. I have read very little about Ping packs giving trouble, but there are many threads about problems with 18650 packs. If I should ever buy another duck tape lifep04 battery, it will be from Ping.
Bubba
Bubba
Btw, does anyone have problem with this guy answering, returning your money or whatever and payed through Paypal ?
My time to open dispute has ended and they gave me this answer:
"Thank you for contacting PayPal, my name is Juan Jose.
Our policy is to investigate a claim if it has been filed within 45
calendar days of the initial transaction. Unfortunately, we received your
claim on the 23rd of February which is after the 45 day deadline and,
therefore, we cannot look into this claim. If it is still within 60
calendar days of the initial transaction date and the item was purchased on
eBay, please contact eBay for further information as you may be able to
file a claim with eBay directly.
We do reserve the right to reopen any claim for investigation within 180
calendar days if we receive multiple complaints about a particular seller.
We will contact you by email if this is the case.
I recommend staying in contact with the seller in order to find a
resolution that you are both happy with.
If you'd like more information please have a look at our User Agreement.
You can find it by clicking on the link at the bottom of any PayPal page.
You will find specific information on the 45-day deadline in the PayPal
Buyer Protection Policy and PayPal Buyer Complaint Policy.
Please let me know if you need further assistance.
Sincerely,
Juan Jose"
So if there are people here who have problem with Mr. Lau or whatever his name is try to open dispute at Paypal and let them know.
My time to open dispute has ended and they gave me this answer:
"Thank you for contacting PayPal, my name is Juan Jose.
Our policy is to investigate a claim if it has been filed within 45
calendar days of the initial transaction. Unfortunately, we received your
claim on the 23rd of February which is after the 45 day deadline and,
therefore, we cannot look into this claim. If it is still within 60
calendar days of the initial transaction date and the item was purchased on
eBay, please contact eBay for further information as you may be able to
file a claim with eBay directly.
We do reserve the right to reopen any claim for investigation within 180
calendar days if we receive multiple complaints about a particular seller.
We will contact you by email if this is the case.
I recommend staying in contact with the seller in order to find a
resolution that you are both happy with.
If you'd like more information please have a look at our User Agreement.
You can find it by clicking on the link at the bottom of any PayPal page.
You will find specific information on the 45-day deadline in the PayPal
Buyer Protection Policy and PayPal Buyer Complaint Policy.
Please let me know if you need further assistance.
Sincerely,
Juan Jose"
So if there are people here who have problem with Mr. Lau or whatever his name is try to open dispute at Paypal and let them know.
mr_transistor
1 mW
Pelsepup- What problems are you having with your battery pack or didn't you receive it? I bought my pack from free_shopping88 in mid-October and it's been running fine. He emailed me a couple times and asked if it was working okay. I responded that it seemed to cut out under relatively low load but I couldn't verify that until I hooked-up a WattsUp meter. I need to take it easy on the throttle but otherwise it delivers much more power than my SLA battery pack and has been holding charge well. I haven't been using my bike in the last few weeks but I was doing my 12-mile roundtrip commute about twice a week Nov.-Jan.. I took a chance on free_shopping88 but I would have went with Ping if I needed a sure-thing. Emails from free_shopping88 had the return address of: freeshopping88 (at) hotmail.com
@mr_transistor
Too lazy to write it all again, so i will post my e-mail that i sended to him 9.11.08 (dd/mm/yy):
"Hello there.
So i picked up my battery from customs Thursday, opened it at work Friday, fixed damaged charger cover with glue (most likely transport damage), checked voltage on batterypack (39,5V), putted it under artificial load (40V lightbulbs consisting together 180W load) on batterypack.
All and well till 37,75V and then voltage started to drop pretty fast.
When voltage dropped to 36,95V current was cut off (i take that BMS does it ?).
I assume that BMS does cut voltage too high (nominal voltage should be 36V ?).
I though that BMS was designed to cut power off somewhere around 32-33V ?
And it gets even better.
When i putted charger to load batterypack it went well.
But after sometime (around 45 minutes) when i went to check out the level of charging, the charger had fried it's own fuse (3A) and even the automatic fuse (10A) was down.
Checked voltage on batterypack and it was 39,5V.
Putted it under same artificial load as earlier, but this time it's voltage levels lowered much faster than before to the 36,95V where current was cut off again.
After changing the fuse on charger (i'm electrician), i tried to plug charger to the wall outlet and it blew it's fuse and voltage regulator and that 10A automatic fuse also went down as earlier."
His answer, next day:
"hi, friend
thanks for your messenger , we pack very well with the charger, i am sorry to hear the charger crust is broken ,i think it is broken on the way due to the battery is so heavy and press the charger crust broken. and but it is good inside if you work well .
please remmeber to use the BMS with the battery together, because the BMS protect the battery to use long time .
yes, the BMS will cut off if voltage too high , because the battery you order is 36v 20ah .
about the battery , BMS , charger , our factory proffesional all test 3 times before we shipped , all are great .
i ask our proffesioal , when you charge the battery ( if cut off due to the voltage), you could pull out the BMS , so it is easy to charge the battery fully .
when you use the battery , you must insert the BMS and use together to protect the battery .
i suggest you not use your 2A lead acid charger , because our charger only charge the LiFePO4 battery .
if also have any other question , let me know .
if it is ok , hope you will leave a feedback for me, i will do the same for you , thanks again and nice to do business with you
dave"
My answer:
"No, no you got it all wrong.
BMS cuts voltage when it is not supposed to.
When voltage is lowering from 39,5 volts to 36,95 it cuts it off.
If BMS cuts voltage off without getting to it's nominal voltage (36 volts), then it can't be alright."
His reply next day:
"Hi, friend
thanks for your fast reply , i ask our factory proffesional again , when you charge for the battery , it will cut off when the voltage is is lowering from 39,5 volts to 36,95 .
but if you use the battery and BMS together when Discharging , it is no problem .
so if you don't want to the BMS cut off when you charging, please remove the BMS to charging , then charge fully , you insert the BMS again to protect the battery when you use the battery.
if it is not good for you like that, how about you only pay the shipping cost , we send the other BMS to you for free again . or you return that BMS, and we resend the other BMS to you all for free to you , let me know your idea, thanks for your great understanding
dave"
I only did three test charges during this conversation.(not counting first charge to make sure it is full)
Initial charge went well. Voltage was after charge 39,5V.
After discharging it i was amazed how fast it went off.
Used my voltagemeter to see what voltage was after cutting off. It was that 36,95V.
After next charge, charger blow its fuse. I was like wtf, and replaced it and checked other components too.
(It still charged it full.)
And again during discharge it went off during 36,95V.
After next charge, it had blown its own fuse and most of the component on it's pcb.
Meh, had co-worker change all those component that were fried. (minus that big one, i take it is the transformer)
And it did again, when i plugged it in.
Was gonna mail him next day, but i sprained/injured my back and were in hospital for over a month.
I had somewhat forgotten the whole issue, but when i went back to work, (after being home after hospital for couple weeks)
i remembered it and mailed him:
"Hello there again.
Would like you to send me the new charger and BMS-unit.
Have been in hospital for over a month, would have contacted you earlier if i could have.
Friend of mine analyzed that charger and changed the most of the parts to the new ones.
He suggested that the transformer on the charger has been busted from the beginning.
And the BMS could be faulty for cutting off to early when discharging."
Waited for a week.
No answer.
Next mail i shoot to him:
"It seems that you won't like to send those items to me, so i'm gonna have to escalate this in to dispute in PayPal.
Have been hearing in forums that i weren't the only one who got a bad charger and second-hand Bms from you."
And after that Paypal couldn't/wouldn't do anything, i came here only to find that he had copied his Bms from Ping and other people having also problem with batterypack from him.
That's why i asked if anybody else had any problem's with him.
Too lazy to write it all again, so i will post my e-mail that i sended to him 9.11.08 (dd/mm/yy):
"Hello there.
So i picked up my battery from customs Thursday, opened it at work Friday, fixed damaged charger cover with glue (most likely transport damage), checked voltage on batterypack (39,5V), putted it under artificial load (40V lightbulbs consisting together 180W load) on batterypack.
All and well till 37,75V and then voltage started to drop pretty fast.
When voltage dropped to 36,95V current was cut off (i take that BMS does it ?).
I assume that BMS does cut voltage too high (nominal voltage should be 36V ?).
I though that BMS was designed to cut power off somewhere around 32-33V ?
And it gets even better.
When i putted charger to load batterypack it went well.
But after sometime (around 45 minutes) when i went to check out the level of charging, the charger had fried it's own fuse (3A) and even the automatic fuse (10A) was down.
Checked voltage on batterypack and it was 39,5V.
Putted it under same artificial load as earlier, but this time it's voltage levels lowered much faster than before to the 36,95V where current was cut off again.
After changing the fuse on charger (i'm electrician), i tried to plug charger to the wall outlet and it blew it's fuse and voltage regulator and that 10A automatic fuse also went down as earlier."
His answer, next day:
"hi, friend
thanks for your messenger , we pack very well with the charger, i am sorry to hear the charger crust is broken ,i think it is broken on the way due to the battery is so heavy and press the charger crust broken. and but it is good inside if you work well .
please remmeber to use the BMS with the battery together, because the BMS protect the battery to use long time .
yes, the BMS will cut off if voltage too high , because the battery you order is 36v 20ah .
about the battery , BMS , charger , our factory proffesional all test 3 times before we shipped , all are great .
i ask our proffesioal , when you charge the battery ( if cut off due to the voltage), you could pull out the BMS , so it is easy to charge the battery fully .
when you use the battery , you must insert the BMS and use together to protect the battery .
i suggest you not use your 2A lead acid charger , because our charger only charge the LiFePO4 battery .
if also have any other question , let me know .
if it is ok , hope you will leave a feedback for me, i will do the same for you , thanks again and nice to do business with you
dave"
My answer:
"No, no you got it all wrong.
BMS cuts voltage when it is not supposed to.
When voltage is lowering from 39,5 volts to 36,95 it cuts it off.
If BMS cuts voltage off without getting to it's nominal voltage (36 volts), then it can't be alright."
His reply next day:
"Hi, friend
thanks for your fast reply , i ask our factory proffesional again , when you charge for the battery , it will cut off when the voltage is is lowering from 39,5 volts to 36,95 .
but if you use the battery and BMS together when Discharging , it is no problem .
so if you don't want to the BMS cut off when you charging, please remove the BMS to charging , then charge fully , you insert the BMS again to protect the battery when you use the battery.
if it is not good for you like that, how about you only pay the shipping cost , we send the other BMS to you for free again . or you return that BMS, and we resend the other BMS to you all for free to you , let me know your idea, thanks for your great understanding
dave"
I only did three test charges during this conversation.(not counting first charge to make sure it is full)
Initial charge went well. Voltage was after charge 39,5V.
After discharging it i was amazed how fast it went off.
Used my voltagemeter to see what voltage was after cutting off. It was that 36,95V.
After next charge, charger blow its fuse. I was like wtf, and replaced it and checked other components too.
(It still charged it full.)
And again during discharge it went off during 36,95V.
After next charge, it had blown its own fuse and most of the component on it's pcb.
Meh, had co-worker change all those component that were fried. (minus that big one, i take it is the transformer)
And it did again, when i plugged it in.
Was gonna mail him next day, but i sprained/injured my back and were in hospital for over a month.
I had somewhat forgotten the whole issue, but when i went back to work, (after being home after hospital for couple weeks)
i remembered it and mailed him:
"Hello there again.
Would like you to send me the new charger and BMS-unit.
Have been in hospital for over a month, would have contacted you earlier if i could have.
Friend of mine analyzed that charger and changed the most of the parts to the new ones.
He suggested that the transformer on the charger has been busted from the beginning.
And the BMS could be faulty for cutting off to early when discharging."
Waited for a week.
No answer.
Next mail i shoot to him:
"It seems that you won't like to send those items to me, so i'm gonna have to escalate this in to dispute in PayPal.
Have been hearing in forums that i weren't the only one who got a bad charger and second-hand Bms from you."
And after that Paypal couldn't/wouldn't do anything, i came here only to find that he had copied his Bms from Ping and other people having also problem with batterypack from him.
That's why i asked if anybody else had any problem's with him.
mr_transistor
1 mW
thanks for detailing the problems you experienced! I must have been very lucky. My charger case was also cracked (cheap plastic) and it's not UL certified for use in the USA (no surprise). I posted some pics of my battery pack on the forum a few months ago. The BMS has been functioning okay for me but it is also made at minimal expense and the chip IDs have been scraped away from all the semiconductors (chips and FETs). The round cells used in the pack don't have a very good reputation so I'm expecting to go hunting for bad cells once the pack starts to die. For now, my charger seems to work well and the BMS cutout isn't too bothersome. The email replies I received from free_shopping88 were just as cryptic as the one you received and he did not address the questions I had.
rguy56
100 W
I was feeling nostalgic over jimmywuueastunitedmusicmp3hkpeterwongfreeshopping88etc.
So sad to see that ebay lets him stay in business. Believe me, I reported him multiple times to ebay as I noticed each identity change. I also followed paypals rules to the letter and received no satisfaction from them on my large claim. They simply kept extending their decision deadline.
Fortunately, I made a claim through my credit card, and they eventually came through for me, so I was only out hundreds of dollars.
I haven't dealt with ebay since.
So sad to see that ebay lets him stay in business. Believe me, I reported him multiple times to ebay as I noticed each identity change. I also followed paypals rules to the letter and received no satisfaction from them on my large claim. They simply kept extending their decision deadline.
Fortunately, I made a claim through my credit card, and they eventually came through for me, so I was only out hundreds of dollars.
I haven't dealt with ebay since.
rguy56 said:
Hey Rguy, remember me? I think we went through same thing last summer/fall. Seem like dejavu all over reading this thread.
Good thing is - one of my two pack is still functioning fine and the one I had a problem with - surprisingly he gave me a refund and he didn't even want it back. So actually I shafted him - sort of.
rguy56 said:
Wisely shopping on eBay is a must to avoid being scammed. I guess I was lucky enough to be a seller for eBay for two years to know "how it goes" on there. I quit selling on eBay since it really wasn't that profitable in the resale business(or at least my segment.), and my thirst for money grew once I could legally work.
Heh, ordered charger and Bms from Ping.
And i regard about that Ebay/Paypal doing shit to put that guy out of business, Ping answered me this:
"We have done that. But signalab is the name of our company registered in China, not the US. And ebay.com is a US site. They don't protect us."
In other words they don't give shit. Just take their part of the money and let him run his business.
Sad, just sad.
And i regard about that Ebay/Paypal doing shit to put that guy out of business, Ping answered me this:
"We have done that. But signalab is the name of our company registered in China, not the US. And ebay.com is a US site. They don't protect us."
In other words they don't give shit. Just take their part of the money and let him run his business.
Sad, just sad.
Technologic
10 mW
- Joined
- Mar 4, 2009
- Messages
- 22
dogman said:
Ping's prices are rather high.... that could be one reason.
dogman dan
1 PW
Pings cells are clearly superior to the typical 18650 round cells found in a mr lau pack. There seems to have been very few compaints about cammy cc. If a bargain round cell pack is all you can afford, that vendor is a better bet than mr laus latest selling name. If you pound a battery pack hard like I do, the Ping is worth the extra money. But his prices have crept up as the cells inside improved. The v2 packs seem to be proving out with much bigger motors than I thought possible. Much better offerings are now appearing from ebike vendors. Hightekbikes.com and Ebikekit.com both have prismatic cell lifepo4 at decent prices, and no dealing with china. The duct tape battery is here to stay, but its not the only option this year.
docnjoj
1 GW
Ditto what Dogman said! My combo of a Ping 20 ah 48 volt battery with my Bafang uses very little power for really fine performance. In fact, the battery is probably too big for my trips of 12-15 miles for exercise, plus local shopping. The trike holds it with no problem, but I seldom use more than 4-5 ah in 12 miles. Serious overkill, but it will probably last a while!
otherDoc
otherDoc