David in Canada
New Member
Hi all, I am in desperate need of help with a scooter battery issue.
I recently got six new 12V 20ah batteries for my 72V e-scooter, as the old ones were toast. I installed them and charged them up, and they show as fully charged (the momentary startup display shows around 80-81V, which is about right for new batteries in my e-bike/scooter, from my experience). Then I start to drive and the battery display on the scooter immediately drops down to 3 bars, from 6 (fully charged). It happens almost right away.
I thought the batteries were defective/old stock, so I went back to the store and got 6 fresh ones. Installed them, and same thing occurs. So it's something wrong on my end. I brought my charger to the store and had it checked out - it works fine. So now I'm thinking its a controller issue, or I somehow pulled a wire loose when I swapped the batteries the first time.
The original old, almost-dead batteries would still display six bars when fully charged. Obviously those old batteries would start to die quite quickly, as they had 3500+km on them, but I would still have to drive several km before the bars would drop down to 5, then 4, and so on. The brand new ones are at only three bars right away on a full charge. I didn't do anything different other than replace the batteries.
I was going to bring it in to the store to get it looked at more fully, but wanted to see if anyone on here had experience with this issue, and could give me some guidance. I'm reasonably good with maintenance, and am just wondering if it's worth it to almost completely take it apart to look for a loose wire or something... is there anything you guys can think of that would cause this issue? Thanks so much in advance for any help, and sorry for typing out a small book, here. I appreciate any advice.
I recently got six new 12V 20ah batteries for my 72V e-scooter, as the old ones were toast. I installed them and charged them up, and they show as fully charged (the momentary startup display shows around 80-81V, which is about right for new batteries in my e-bike/scooter, from my experience). Then I start to drive and the battery display on the scooter immediately drops down to 3 bars, from 6 (fully charged). It happens almost right away.
I thought the batteries were defective/old stock, so I went back to the store and got 6 fresh ones. Installed them, and same thing occurs. So it's something wrong on my end. I brought my charger to the store and had it checked out - it works fine. So now I'm thinking its a controller issue, or I somehow pulled a wire loose when I swapped the batteries the first time.
The original old, almost-dead batteries would still display six bars when fully charged. Obviously those old batteries would start to die quite quickly, as they had 3500+km on them, but I would still have to drive several km before the bars would drop down to 5, then 4, and so on. The brand new ones are at only three bars right away on a full charge. I didn't do anything different other than replace the batteries.
I was going to bring it in to the store to get it looked at more fully, but wanted to see if anyone on here had experience with this issue, and could give me some guidance. I'm reasonably good with maintenance, and am just wondering if it's worth it to almost completely take it apart to look for a loose wire or something... is there anything you guys can think of that would cause this issue? Thanks so much in advance for any help, and sorry for typing out a small book, here. I appreciate any advice.
