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Most electric scooter and bike battery chargers have a green light and a red light. When the charger is plugged into
the vehicle and into the wall the red light indicates that the battery pack is charging, and the green light indicates that the charger is plugged into the wall. When the red light turns off and only the green light is on that indicates that the battery pack is charged and the vehicle is ready to use. If the charger light stays green and there is no red light when the charger is plugged into the vehicle and into the wall this could be caused by many things. It could be from new
batteries that have never been used and have a full charge, worn out batteries with low Voltage that need to be replaced, a loose wire or defective connector between the battery pack and charger port, a defective charger port or battery charger plug, a burned out fuse in the charger, or a defective battery charger. To figure out the problem first test the Voltage output of the charger. The chargers Voltage should be a little above the Voltage of the vehicle (a 24 Volt vehicles charger
should output around 29 Volts, etc.). If the charger output Voltage is correct then the charger and charger plug are usually good. If the charger has no output Voltage then check to see if it has a fuse and replace the fuse if necessary, then retest the charger. If the charger does not have a fuse then it may need to be repaired or replaced. Next test the Voltage of the battery pack at the charger port. The battery pack Voltage should be a little above the Voltage of the vehicle
(a 24 Volt vehicles battery pack should output around 27 Volts, etc.). If the battery pack Voltage is correct then the battery pack, charger port, and wiring between the battery pack and charger port are good in respect to the battery charger operating properly. However just because the battery pack has the right Voltage at the charger port that does not mean that it is good because its Voltage may drop under load when the vehicle is on causing the vehicle to not operate. The battery pack's
Voltage could be tested at the charger port with the vehicle on and throttle engaged to see if it drops Voltage under load. If the battery packs Voltage is lower than the Voltage of the vehicle then that could cause the battery charger to not charge the batteries and the red light to not turn on. Good battery packs will always bounce back to their normal Voltage range within a few minutes after being used. Battery packs that do not bounce back to their normal Voltage range after being used
are defective and most battery chargers will not charge them if they detect this. The reason chargers will not recharge bad battery packs is because charging them could cause them to overheat, swell, and possibly leak which could cause damage to the scooter or its surroundings. Did you find it helpful?
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you please tell us how we can improve this article? Batteries, Chargers, and Battery Management Systems. gutera 1 mW Charger does not charge (green light only) help!Hello everyone, I bought this charger and it has the famous green light problem. The red light and fan does not
turn on to start charge. Last edited by gutera on Aug 27 2018 8:31pm, edited 5 times in total. eee291 100 kW Posts: 1195Joined: Nov 05 2015 4:35pmLocation: Austria, Burgenland Re: Charger does not charge (green light only) help!Post by eee291 » Aug 18 2018 1:59pm One of them changes the Current and the other one changes the cut-off current at the CV stage. amberwolf 100 GW Posts: 34998Joined: Aug 17 2009 6:43amLocation: Phoenix, AZ, USA, Earth, Sol, Local Bubble, Orion Arm, Milky Way, Local Group Contact: Re: Charger does not charge (green light only) help!Post by amberwolf » Aug 18 2018 4:30pm It is unlikely adjusting anything in the charger will fix the problem. gutera 1 mW Re: Charger does not charge (green light only) help!Post by gutera » Aug 18 2018 11:09pm I believe the battery is fine, the charger port of the battery reads 36v (the current state of the battery) and it charges
with a 42v 1.5A lead acid charger I have lying around. (didn't do a full charge with the lead acid charger, read around it is dangerous). gutera 1 mW Re: Charger does not charge (green light only) help!Post by gutera » Aug 19 2018 12:25am
What if I decrease the cut off current so that it won't cut off and start the charger? Maybe the battery is not accepting the full 5A of the charger and it is considering as full, I dont know, brainstorming here, tests will be ran tomorrow. gutera 1 mW
Re: Charger does not charge (green light only) help!Post by gutera » Aug 19 2018 6:54am Update: I hooked the charger directly to the bicycle controller and tried to turn it on. It failed,
shutted off immediately and did not even light the dashboard. Fuses are still intact. I am still unable to make the charger output power.
999zip999 100 GW Re: Charger does not charge (green light only) help!Post by 999zip999 » Aug 19 2018 10:00pm The charger you need is a cc-cv . The sla charger does trickle charge after hitting 42 volt. You can use the SLA charger to get it to 41 volts or even 42 volts but you must unplug it as soon as it hits 42 volts I would try for 41volts and unplug. The problem is you watch the charger and walk away the charger will hit 42v or more. Make sure that charger is 42v or lower. To see if the battery will charge. You must monitor the charger and battery and not go to the bar or asleep. dogman dan 100 GW Posts: 36386Joined: May 17 2008 12:53pmLocation: Las Cruces New Mexico USA Re: Charger does not charge (green light only) help!Post by dogman dan » Aug 20 2018 6:39am Its a bad wire connection on the charger plug, or where it connects to the charger itself. classic symptoms. As AW said. Intermittent contact and sounds like getting worse. It could be the wire itself, but usually where it connects on one end or the other. Not so likely the same wire and plug on the battery, since it seems to work with the other charger ok. But it could still be that.
gutera 1 mW Re: Charger does not charge (green light only) help!Post by gutera » Aug 20 2018 8:28am The SLA charger I got measures 41.5v in the output. Charged with the bicycle on to check it's voltmeter, seems ok so far, as you said, it stops at 41v, I am ok with that for now.
gutera 1 mW Re: Charger does not charge (green light only) help!Post by gutera » Aug 20 2018 8:46am Update! gutera 1 mW Re: Charger does not charge (green light only) help!Post by gutera » Aug 20 2018 9:21am Update: gutera 1 mW Re: Charger does not charge (green light only) help!Post by gutera » Aug 20 2018 10:44am Update: Bored with research, decided to plug back to the bicycle and see what happens. amberwolf 100 GW Posts: 34998Joined: Aug 17 2009 6:43amLocation: Phoenix, AZ, USA, Earth, Sol, Local Bubble, Orion Arm, Milky Way, Local Group Contact: Re: Charger does not charge (green light only) help!Post by amberwolf » Aug 20 2018 12:27pm If any part of the charger gets hot enough to cause residues to smoke, something is wrong there. gutera 1 mW Re: Charger does not charge (green light only) help!Post by gutera » Aug 20 2018 12:44pm The smoke was because of a short of dirty flux in the FET, each spark generated more coal which made it worse. With my
soldering I also made the gap smaller. eee291 100 kW Posts: 1195Joined: Nov 05 2015 4:35pmLocation: Austria, Burgenland Re: Charger does not charge (green light only) help!Post by eee291 » Aug 20 2018 12:53pm Turning the Pot randomly will most certainly break the charger. happened to me once, I turned the current pot in the wrong direction, thinking I was zeroing the current but instead I turned it up to 30A and it blew within half a second. gutera 1
mW Re: Charger does not charge (green light only) help!Post by gutera » Aug 20 2018 1:13pm Update: Turned the potentiometers a few turns to each side but no change in the frequency of
the clicking was observed. Test was conducted with indandescent bulb as load and green light only. It appears that the bigger the load the faster it clicks as with no load is very slow, with bulb faster and in bicycle very fast. I would say it ranges from 1-5 clicks a second. gutera 1 mW Re: Charger does not charge (green light only) help!Post by gutera » Aug 23 2018 7:40am Wow, that looks bad, thank god it was only one room and not the whole house.
gutera 1 mW Re: Charger does not charge (green light only) help!Post by gutera » Aug 27 2018 8:35pm Update: Apparently the overloading stress or something caused the charger to stop during a charge and now I do not get even green light or output voltage anymore. Took it apart and applied more magic stare with no success. Also wiggled all the components and wires with a plastic stick while trying
many times turning on at the wall to get voltage, the test failed. What does it mean when charger to power light is green?Green: A steady green light indicates that the battery is fully charged.
Why won't my ebike battery won't charge?If your e-bike battery isn't charging, it can be due to electricity not flowing to the battery, a switch on the charger, a faulty charger or charging port, or an issue with the battery itself. Many issues can be corrected, but some may require you to replace your charger or battery.
How do I know if my ebike battery is charging?For the majority of electric bike models, the indicator light on the battery will blink in some fashion while it is being charged. Once the red light indicator has illuminated, you will need to remove the battery from the bike bay. Be sure to turn the battery off before you connect it to the power supply.
Why is my cart battery charger green?When your pen battery is fully charged, the charger light should turn green and your battery light should be off.
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