battery acid

[Richards 7]

Hi new battery to be posted to me dry so I need acid. Quick question, can I usethe acid from the old battery or does it go off or become contaminated..

R

[Roger Ford]

How are you aiming to get it out? Not the easiest job, and you really don't want to be getting it on you or your clothing

Better to get a local battery specialist to fill it , but be prepared to answer searching questions as to why you didn't just buy the battery from them in the first place.

[Paul Richards]

A bit late if you have already ordered your battery, but you can get a banner battery delivered full of acid and ready to go from Tayna. Great service. 

[Roger Ford]

You can buy a litre of battery acid from Amazon marketplace for less than six quid delivered. Be very careful when filling it though.

[Richards 7]

As always good advice... thanks so much. Has anyone tried the Oddessy AGM extreme 25...

Thanks

[john g]

As  Paul said, Tanya 

[thompster]

For reference you can't use acid from an old battery.  As a battery discharges the sulphor in the sulpuric acid reacts with the lead plates, creating lead sulphate and water.  When you charge the battery the process is reversed and the H20 turns back into H2SO4.

Batteries generally fail either because the plates are mechanically damaged (e.g. through overcharging/heat) or because they've been left discharged (lead sulphate and water) which allows the sulphur to crystalise.  The more time a battery spends at less than 100% charged the faster this will happen, hence why continuous chargers make batteries last for ever-ish.

[John Vine]

For reference you can't use acid from an old battery.  As a battery discharges the sulphor in the sulpuric acid reacts with the lead plates, creating lead sulphate and water.  When you charge the battery the process is reversed and the H20 turns back into H2SO4.

Batteries generally fail either because the plates are mechanically damaged (e.g. through overcharging/heat) or because they've been left discharged (lead sulphate and water) which allows the sulphur to crystalise.  The more time a battery spends at less than 100% charged the faster this will happen, hence why continuous chargers make batteries last for ever-ish.

Just to clarify the chemistry...

It's not the sulphur that reacts with the lead (and lead dioxide) but the sulphate ions (SO4--).  When the battery is charged, the reverse occurs: lead sulphate and water revert to sulphuric acid and lead (and lead dioxide).  When sulphation occurs, it's not the sulphur that crystallises but the lead sulphate.

JV

[Rex]

I've had this problem with all my previous batteries. The guy at the battery outlet here tells me I need a dry cell. We found a Harley-Davidson battery that will fit and has 700 amps vs 400 for the previous ones. It is working great so far. I just had to make some slight modifications to the battery holder.