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Your reverse is battery powered I would suggest the battery is shot.
You could try charging it and see it that helps but if the battery is nearing or over 2 years old I would get a new one. Remember to disconnect negative lead first to remove battery and connect positive lead first to refit. Also keep in mind do not use a car charger on a bike battery and never use a charger with more than 1 amp output. Bike batteries survive best on low current chargers. Final point never jump start your battery from another vehicle or other source. Good luck
If your bike works when you have the charger connected but doesn't whith the charger disconnected and just the battery then your battery is not charged or you have a bad connection between the battery and ebike.
If the battery charger is showing green then it normally means that charging has stopped charging and there is no current flow to battery. This could be because the battery is fully charged, OR there is an open circuit (broken wire, etc.) between the charger and battery, OR your battery is so flat the voltage is below the low voltage cut-off point of the charger so the charger is not switching on.
You need to check the voltage out of your battery and compare it to the LVC of your charger (should be specified in the user manual), but from what you have described I'd say you need to replace your battery.
You can charge the battery without removing the battery. Find the large cable that comes from the battery where it connects to the starter. Connect you positive charger clamp there. Connect the negative charger clamp to any good frame ground on the bike. You can charge you battery using this method provided you battery charger clamps are not too big.
If you can't do this, you'll have to take the seat off the bike, remove the battery hold down strap, and then move the battery outwards so you can disconnect the negative battery cable.
If you are buying a multitester also consider buying a small motorcycle battery charger. They make ones that have a remote charging cable that you put on the battery one time and then you have an easy way to connect the small charger up when the bike it sitting for long periods. This will keep the battery fully charged and ready to go when you are.
Some batteries are sold only partially charged and you need to bench charge them fully before running them on the bike. Depending on your bikes energy demands the battery may never fully charge up during regular use.
If you put the multitester on DC voltage check the battery to see what its resting charge state is.
If the battery is reading less than 10.6 volts its probably down too low the recharge itself using the bikes alternator. Charge it until its resting voltage is 12.0 volts. Then your bikes alternator can make enough juice at 14-15 volts to recharge the battery while its running.
Good luck and be careful.
i know this sounds silly ,but when you bought the battery had it been activated,new batterys are critical in their first charge and you cannot use a standare type automotve charger,if bought dry the battery needs to have the acid filled ,left to sit for at least 2 hours prior to charging,once it has sat for the 2 hrs with the acid in,the new battery will need to be charged with a "cteck"or similar type charger for at least 13 hrs before it can be put into normal service,what happened with yours i think is that sure you gave it a charge but it has only recieved a "surface charge"and will be usable for a very short time,it may recover for a brief period and go again untill the surface charge dissipates,(or in other words ..runs out of charge)best thing you can do with the battery is take it to a auto electrician and have the battery cycled and conditioned,this is not expensive to do and will give you piece of mind,after conditioning the battery shouldngive excellent service,i have the battery in my goldwing coditioned about every 12 months and i have the same battery that was in the bike when i bought the bike 8 years ago and still no electrical or battery problems(costs about $25 to get it done)once a year but that beats $280 for a new one...hope this helps
when you charge the battery make sure that its cable is is loosen from the motor coz it can damage your charging system. on your case you have damage it already that's your light dims whenever you rev the rpm up. so change your voltage regulator of your charging system, charge the battery and it is done easy.
Could be several things.
Your battery could be bad. After not being charged for a while, they do go bad- often. You may want to try a new battery along with your new charger.
You could also have a switch /connection problem. If you get a new battery and it still doesnt work, you may want to check the switches and wiring. It is not uncommon for the switch to go bad especially if it had been stored outside.
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