Batteries Specific Gravity

[couyon]

I have a set of batteries that seem to have taken a charge, they will hold a 3 min load test however they are no showing any gravity? sugestions please.

 

[Andy4639]

Even a bad battery will hold a little charge. 3 minutes is not much. Charge them and get a reading of the battery while you ride it. if they ant showing no Gravity then they are toast, done!

 

[couyon]

Thanks Andy, would it be possiable to add acid cause i think the batts where left in the rain open.

 

[Andy4639]

Yes you can add acid, will it help I doubt it! I have never seen a battery that can be brought back to life. Sorry I would just bite the bullet and get a new set.

 

[dougmcp]

The water added to a battery is only to replace water that has been boiled off during charging etc.
Leaving the battery open in the rain won't hurt it, just tops off the level. I would draw off some of the top until it is down to just above the plates.

You can only do an SG test after the battery has been charged. Did you charge it first before checking the SG?
If they hold a 3 min load test they must have some SG.

Are you sure your hydrometer is working?

What is the voltage of the battery after charging and resting for an hour?

 

[couyon]

Thanks Doug

, I did that yesterday evening and placed them back on charge

this is going to be my last attemped with these

, i would like to thank you fellas for your time i will be around

, and when i complete the cart Im working on i will give up some pics

this is my 4th build

and there is another two on the shelf :yikes2 hydrometer works great i doulble checked it on a new battery.

 

[Andy4639]

You checked it and it works on a new battery and still not on these in question, your wasting time. I would get new ones.

 

[dougmcp]

You can only do a specific gravity test after the battery has been charged.
Charging mixes the water added on the top with the rest of the electrolyte and restores it to 1.27 SG.

 

[Andy4639]

I understand that, but by what he says I would assume they were charged before.

You could be right though you never know on the other side of a computer

 

[couyon]

Check it out i removed the water above the plates added acid chage them for tweve hours and they are showing great sgs and are holding aload as well as remaining charged

thanks fellas also today i painted the body for may newest build today. how can i post pics

 

[dougmcp]

Glad to see it's working out. Keep us in the loop on the paint job. To post pics, they need to hosted on the web. Places like photobucket and picasa do it for free.

 

[couyon]

Good deal I will work on it.