Charging a bike battery

Message
Author
PioneerUrban
Site Supporter - Silver
Site Supporter - Silver
Posts: 107
Joined: Mon Apr 30, 2007 1:50 pm
Sex: Male
Years Riding: 2
My Motorcycle: 2005 Honda Rebel
Location: Ohio

Charging a bike battery

#1 Unread post by PioneerUrban »

My battery died, so this is the first time that I need to charge it.

I have a charger that has 2 amps, 10 amps and a 50 amps charge. The 50 seems like it's too much.

Should I put my battery on the 2 amps charge overnight? Or, use the 10 amp charge for a few hours?

Is there a certain charger for my bike that I should get?

TIA!
Current Ride:

2005 Honda Rebel 250

Used to own:

1992 Kawasaki Ninja 250: Sold
2001 Kawasaki Eliminator 125: Sold

User avatar
jonnythan
Legendary 2000
Legendary 2000
Posts: 2470
Joined: Tue Jun 20, 2006 8:08 am
Sex: Male
My Motorcycle: Year/Make/Model

Re: Charging a bike battery

#2 Unread post by jonnythan »

PioneerUrban wrote:My battery died, so this is the first time that I need to charge it.

I have a charger that has 2 amps, 10 amps and a 50 amps charge. The 50 seems like it's too much.

Should I put my battery on the 2 amps charge overnight? Or, use the 10 amp charge for a few hours?

Is there a certain charger for my bike that I should get?

TIA!
2 amps is certainly on the high side for charging a motorcycle battery. 10 is definitely too much.

The best bet would be to pony up $30 or so and get a low-amperage charger like a Battery Tender Jr.

http://www.amazon.com/Battery-Tender-Ju ... 886&sr=8-5
[url=http://www.flickr.com/photos/jonnythan/sets/]Flickr.[/url]

User avatar
flynrider
Legendary 2000
Legendary 2000
Posts: 2391
Joined: Thu Jul 21, 2005 1:36 pm
Sex: Male
Years Riding: 30
My Motorcycle: '93 Honda Nighthawk 750
Location: Phoenix, AZ

#3 Unread post by flynrider »

I think 2 amps should do the trick. I've got a pile of MC chargers I've collected over the years. Most are in the 1.5 amp range, but the one I've been using lately is a 2 amp. Haven't had any problems with it overcharging. A dead battery should take 6-8 hrs. to charge at a 2 amp rate. Don't leave it on there too long. A lot of these chargers don't have an auto-shutoff feature and you could end up boiling the battery.

For dead flooded cell batteries, the best way to bring them back is a slow charge over a long period. Quick charging at high rates can cause the plates to warp or sulfate excessively. That tends to shorten the life of the battery.
Bikin' John
'93 Honda CB750 Nighthawk

User avatar
Savvy1400
Rookie
Rookie
Posts: 6
Joined: Mon Oct 01, 2007 4:36 pm
Sex: Male
Location: Ottawa,Canada

#4 Unread post by Savvy1400 »

2 amps is just right for a motorcycle battery, but try to get yourself a good cheap battery tender with an automatic shut-toff, so as to not overcharge your battery and possibly damage it.

This just from experience :oops:

:chopper: Savvy
Always be true to yourself.

Ride Free Or Die Trying

PioneerUrban
Site Supporter - Silver
Site Supporter - Silver
Posts: 107
Joined: Mon Apr 30, 2007 1:50 pm
Sex: Male
Years Riding: 2
My Motorcycle: 2005 Honda Rebel
Location: Ohio

#5 Unread post by PioneerUrban »

Thanks for the responses.

I found one on ebay that was a fair price and bought it.

I had my battery on the 2 amp charge for a few hours, but it got too dark to re-install it. I'll do that tomorrow and hopefully, it'll fire up.

Thanks again!
Current Ride:

2005 Honda Rebel 250

Used to own:

1992 Kawasaki Ninja 250: Sold
2001 Kawasaki Eliminator 125: Sold

User avatar
RoadRocket
Rookie
Rookie
Posts: 19
Joined: Sat Jan 13, 2007 2:15 am
Sex: Male
Location: Wiltshire, England

#6 Unread post by RoadRocket »

Many years ago I charged a bike charge using a 10 amp charger and it wrecked it. I looked at the label on the battery afterwards and in small print it said: Maximum Charge 0.5 Amps.

I now use an Optimate smart charger that you can connect to the battery all the time.

This works by testing the battery first and if the plates are sulphated, (which is common on batteries that don't get enough use) they give the battery a short charge at 0.2 Amps at 20 Volts. This doesn't harm the battery but gets rid of the sulphation. After a set period it stops charging, tests the battery again and providing it's OK it will then charge the battery normally.

They are a very good piece of kit:

http://www.accumate.co.uk/it010003.html
When the sun beats down and I lie on the bench, I can always hear them talk.
....... Me, I'm just a lawnmower - you can tell me by the way I walk

Post Reply