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Asked — Edited

High Amperage Battery/Charger Combo

It's possible I have asked this already but could anyone recommend a battery/charger combo witha high amperage battery at a good price? 12V 18Ah seems around where i need. Will get 2 and put them in series.

Thanks,
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Synthiam
#6  
Rich, I never said I would be charging in series. I don't mind if they take a while to charge.

ww321q, No I don't.

rryerson, Thanks for the info.

thetechguru, yes I am, and i'm looking for a cheap battery/charger combo I can get 2 of to run the chair.
#8  
You charge in parallel and optimal charging rate is 2.5 amp per battery. So a charger that puts out 4-5 amps will charge two at once at a ideal rate. Each battery has a charge rating, min, max and optimal. The power sonics do great on a 2 - 2.5 amp current. You can charge them faster But it reduces the overall batteries life. Don't try charging a 9 ah battery more that 1C which is 9 amps. For a 7 ah battery @ 1C that's 7 amps and so on.
#9  
Whenever there is a single battery that has the same capacity you need as a couple if small ones you will notice you save money. This is name brand , with warranty free shipping power sonic 12v 35 ah battery with load handles

Ebay item #171043247259

69.99 free shipping
#10  
Schumacher 8 amp charge 2 amp trickle is a good choice here

Ebay item 231162794636

About 22 dollars.
#11  
Probably free shipping is to the US only. Us Canadians get hosed with shipping from the States
#13  
I really need to try not to go over budget(I know, budgets in robotics never hold). The 18AH batteries in series will give me 24V 18AH.
So if I get a battery charger capable of say 5AH and put the batteries in parallel I could charge both at 2.5A?
#14  
Why do you need 24 volts? What could you possibly utilize it for? Also it causes wiring to get complicated because 24 volt means you can't use a standard charger. Even if your using wheelchair motors you can run them at questions volts and still move around a 200 pound bot.
#15  
The wheelchair i'm looking at uses a 24V battery. it's pooched so i'm looking into another battery setup.

By "questions" do you mean 12V?
#16  
You can use 12v on wheelchair motors and it simplifies things for you.
#18  
Yea , you gotta remember wheelchair motors are ridiculous and at 24 volts pull a 500 pound load 5 mph. Your robot is not going to weight that. Even if it's half that's 250 pounds at 5 mph. It's still lots of power just less that at 24 volts. Having less power in this case is safer too.
#19  
The one i'm looking at is an Invacare action power 9000 storm series.

User-inserted image


Not sure what it's max load is but I guess I can take your word.
#21  
@Josh, Hey I just noticed your new user name. Great idea. It shows that you are partner of the company. It's hard to know that unless you keep telling people.
United Kingdom
#22  
Except the user details page for that username is broken, i assume due to the forward slash.
#23  
I took the slash out , i guess it didn't like it but the link seems to work now. Yea i figured it would be best to add it to the name otherwise people would just think I'm some guy talking at random about the projects lol.
United Kingdom
#24  
Perhaps you should see if EZ-Robots will add a new location just for you and ant as XL-Robots;)

Anyway, we have hijacked this topic... Back to amps and batteries and stuff:)
#25  
True , we were totally Thread pirates , anyways you should have info to get yourself a good sized battery cheaper than the originals you were looking at.