Battery issues?
Seasoned HDF Member
Joined: Sep 2017
Posts: 12,233
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From: England
In simple maths I work out that if you can perhaps take 3 amps out of a 12 Ah battery and still leave enough for a start but only guessing it ought to last 11 days.
3 / 0.011 = 272 hours = 11 days.
0.011 Amps is the current draw seen with the bike off.
This is the expected time a battery should not need charging but it will need charging after starting the bike as it will be at a low state of charge. If the battery doesn't get fully charged now there is a chance it may not start the bike reliably. All guess work here. Don't shoot me only come with more facts for the OP.
3 / 0.011 = 272 hours = 11 days.
0.011 Amps is the current draw seen with the bike off.
This is the expected time a battery should not need charging but it will need charging after starting the bike as it will be at a low state of charge. If the battery doesn't get fully charged now there is a chance it may not start the bike reliably. All guess work here. Don't shoot me only come with more facts for the OP.
Last edited by Andy from Sandy; Apr 14, 2024 at 03:04 AM.
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Joined: Feb 2023
Posts: 20
Likes: 5
From: Nijmegen, Netherlands
What i do notice is that, when charged fully with a charger, when i start the bike, it doesnt seem to crank really fast as stated in the opening post.
It cranks once or twice, then pauses like the next crank takes ages. After that crank it does start immediatelly.
The battery is full at this moment, but when i compare to other videos of forty eight's starting, they crank fast and consistent and start almost instant.
11 days is not what im getting out of is, at most 4-5, but it drains 0.011a when off. So might this mean that the battery itself might be not good?
It cranks once or twice, then pauses like the next crank takes ages. After that crank it does start immediatelly.
The battery is full at this moment, but when i compare to other videos of forty eight's starting, they crank fast and consistent and start almost instant.
11 days is not what im getting out of is, at most 4-5, but it drains 0.011a when off. So might this mean that the battery itself might be not good?
Seasoned HDF Member
Joined: Mar 2021
Posts: 18,283
Likes: 3,687
From: backwoods
If a bike is starting slow it is usually the battery, if the cables are tight. Do you have a charger with multiple settings or a jump pack? See if it starts faster after being on 10 amp charge for 5-10 minutes, don't leave it on high
Usually how I know I will need a new battery is listening to how it starts, but I have also been listening to these bikes for years. You could have it load tested.
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