Battery won't charge new bike

Snookguru101

Member
Region
USA
I see. It's like a laptop charger where you plug in connector heads. I wanted to understand why your Rattan charger has an adapter.

However, a Sondors charger fits your Rattan battery. That means you have the standard 5.5 mm charger socket. But the Sondors charger doesn't work either.

If the battery won't take a charge, the root cause is not important. You need to demonstrate to the seller that the battery won't charge. I predict that he is going to send you a new charger first, because it's a 5 dollar part, Then after you show it doesn't work, he'll have to cough up a battery,

Good luck.
I did go through PayPal so that is one good thing. I already told him don't send me a charger because that would not solve the issue. Except that my charger does fluctuate all over the board from 13 volts to 60 volts. But I was told some chargers are made like that to wake up a battery. The Sonders charger is a steady 54.6 volts and won't charge it. I let them know that. Just the battery staying it has at least two thirds of a charge by pushing the button on the battery. But my LCD screen flashes and shows zero bars on battery indicator flashes like 0 power. Thanks for the help I have a feeling is the battery myself not sure with LCD issue though.
 

harryS

Well-Known Member
I have many lithium battery chargers and all of them put put a steady open circuit DC voltage consistent with their target voltage, 8.4, 12,6, 42.0, 54.6 or 58.4. That's the basic approach to charging. There may be some proprietary systems that come in with pulsed DC, but you're not going to see the chinese bike makers trying to copy it.

Have you removed the battery from the bike and taken a look at the contacts? Make sure they're clean and there's no debris that may be doing something weird. Have you tried to charge the battery when it's not on the bike?

Other than that, most diagnosis involves opening the battery, and that makes it harder to make a warranty claim, so all you can do is wait.
 

Gionnirocket

Well-Known Member
Region
USA
City
Y. O.
I have many lithium battery chargers and all of them put put a steady open circuit DC voltage consistent with their target voltage, 8.4, 12,6, 42.0, 54.6 or 58.4. That's the basic approach to charging. There may be some proprietary systems that come in with pulsed DC, but you're not going to see the chinese bike makers trying to copy it.

Have you removed the battery from the bike and taken a look at the contacts? Make sure they're clean and there's no debris that may be doing something weird. Have you tried to charge the battery when it's not on the bike?

Other than that, most diagnosis involves opening the battery, and that makes it harder to make a warranty claim, so all you can do is wait.
fyi... The charger that came with my generic Hailong battery for the BBS02B from Aliexpress does pulse voltage until it is connected to the battery. A second charger purchased as a backup does not... Both work with my battery but the latter will not wake the battery and I must initiate the charge with the switch ON... Once running I can turn the switch OFF. The charger that came with the battery does not require the switch to be ON
 

Snookguru101

Member
Region
USA
fyi... The charger that came with my generic Hailong battery for the BBS02B from Aliexpress does pulse voltage until it is connected to the battery. A second charger purchased as a backup does not... Both work with my battery but the latter will not wake the battery and I must initiate the charge with the switch ON... Once running I can turn the switch OFF. The charger that came with the battery does not require the switch to be
 

Snookguru101

Member
Region
USA
Thanks for the info on the pulsing charger. That seems to be what mine is doing but it's not waking up my battery. But my battery indicates it 2/3 of a charge. But my LCD screen flashes like it has 0 power. And I don't have a switch on my battery unfortunately. I don't want to break open the battery and void the warranty they've got overlap stickers on it on purpose to see if you have open to the battery
 

Gionnirocket

Well-Known Member
Region
USA
City
Y. O.
Thanks for the info on the pulsing charger. That seems to be what mine is doing but it's not waking up my battery. But my battery indicates it 2/3 of a charge. But my LCD screen flashes like it has 0 power. And I don't have a switch on my battery unfortunately. I don't want to break open the battery and void the warranty they've got overlap stickers on it on purpose to see if you have open to the battery
I wouldn't open a battery unless you are sure about what you are doing... the potential is not to be played with. That said I still wouldn't under warranty, especially so soon after purchasing.
See where you get with the seller. They tend to like pictures and videos so I would spend a little time taking some complete videos demonstrating all the issues.
 

harryS

Well-Known Member
Well I am sure glad I don't have those pulsing chargers. SOmetimes I will have four of my 36V packs on charge at once, and it would be a pain if they weren't interchangeable.
 

Gionnirocket

Well-Known Member
Region
USA
City
Y. O.
Well I am sure glad I don't have those pulsing chargers. SOmetimes I will have four of my 36V packs on charge at once, and it would be a pain if they weren't interchangeable.
They are interchangeable...It's more to accommodate a feature of some BMS's. The charger just needs to see a load.
Some BMS's awake with a pulse, others do not have this feature but the charger works regardless once a load is sensed.
 

Snookguru101

Member
Region
USA
Well I am sure glad I don't have those pulsing chargers. SOmetimes I will have four of my 36V packs on charge at once, and it would be a pain if they weren't interchangeable.
They are interchangeable...It's more to accommodate a feature of some BMS's. The charger just needs to see a load.
Some BMS's awake with a pulse, others do not have this feature but the charger works regardless once a load is sensed.
 

Snookguru101

Member
Region
USA
I wouldn't open a battery unless you are sure about what you are doing... the potential is not to be played with. That said I still wouldn't under warranty, especially so soon after purchasing.
See where you get with the seller. They tend to like pictures and videos so I would spend a little time taking some complete videos demonstrating all the issues.
 

Snookguru101

Member
Region
USA
Yeah I'm not going to open the battery. I'm trying to give them a chance to fix the issue. The Bike Works battery just won't charge. Battery says 2/3 full but LCD screen says 0 needs to be charged immediately it's flashing. I've tested the battery is 47 .6 volts
 

Snookguru101

Member
Region
USA
When you say under a load you meaning turning on the bike picking up the back tire and hitting off throttle to me that's on your load is that what you mean?
 

Snookguru101

Member
Region
USA
sorry about that last message did not come out right when you're saying under a load. do you mean putting the battery on the bike turning it on pick the back wheel up off the floor and hit the throttle. to me that means pulling under a load is that what you mean
 

Snookguru101

Member
Region
USA
I have many lithium battery chargers and all of them put put a steady open circuit DC voltage consistent with their target voltage, 8.4, 12,6, 42.0, 54.6 or 58.4. That's the basic approach to charging. There may be some proprietary systems that come in with pulsed DC, but you're not going to see the chinese bike makers trying to copy it.

Have you removed the battery from the bike and taken a look at the contacts? Make sure they're clean and there's no debris that may be doing something weird. Have you tried to charge the battery when it's not on the bike?

Other than that, most diagnosis involves opening the battery, and that makes it harder to make a warranty claim, so all you can do is wait.
 

Gionnirocket

Well-Known Member
Region
USA
City
Y. O.
When I say load I mean the charger needs to see the battery.
Some BMS's have a safety feature that shut down the charge port when not in use. But the BMS will reconnect the charge port to the battery if it sees a pulse or you turn the battery ON via a switch... hence the charger pulses to awaken the BMS without the need to touch the switch.