Introduction: Restoring Automotive Batteries
I learnt this trick several years ago almost by accident. It works best with calcium or maintenance free batteries but the older style also works if the electrolyte level isn''t even turn on the ignition lights. When put on the charger it would simply not charge, and would throw up a fault condition light on the charger. The battery was restored while I fixed the engine and it is still in the van today and it starts perfectly. I''t start your car (assuming your car has no faults) it is likely a cell has gone open circuit and this process will probably not help.
how to recondition batteries ☑how to how to recondition batteries for If your the 1 last update 2020/04/01 battery has a little hydrometer keep an eye on it, it will change colour as the battery condition improves, it a bit hard to see in the photo, but its got a bit of white in the middle, and according to the label it means ""If your battery has a little hydrometer keep an eye on it, it will change colour as the battery condition improves, it a bit hard to see in the photo, but its got a bit of white in the middle, and according to the label it means ""
The battery photographed had a voltage of 5.69, well and truly flat and likely not going to be able to be charged with a battery charger. I have successfully restored batteries with zero volts, and one that is 12 years old
- When the solar panel is first connected, the voltage shoots up to over 18 volt this is normal, (and is something that most battery charges can''t disconnect yet.
- The voltage will then go up to 15- 16 volts you need to keep it at this voltage for 2 or 3 days, you will then notice the hydrometer will start to turn green.
- This is why you need a correct size panel, if it is too large the battery will heat up at this stage which is very bad.
I''ve had 9 success and two failures. The two that failed it was obvious in the first couple of days that something wasn''t leave it on concrete or it will drain the batter as will
Is that true? I always thought it was an urban myth
I concur with the myth idea. Plastic is non-conductive and will not allow a path for discharge.
Myth: Excellent information here. http://www.homepower.com/articles/solar-electricity/equipment-products/ask-experts-batteries-concrete
Thanks for the info, Its cool to find out where the myth came from.
5 years ago
Very true... Concrete sucks energy out of lead acid batteries