Topping up deep cycle battery

Cee · Senior Member

Topping up deep cycle battery

DeBe · Guru

Hi Cee, Picture of inside my battery, there is a piece of tubing protrudes down from the filler I find a reasonable level is a couple of millimeters down from the end of the tube.

ozjohn · Guru

My knowledge of most things electricakl is extremely limited, but yes, a torch is probably your best option. You may also consider useing a cheap magnifing glass available from the budget asian shops.
The main problem with overfilling is that as the battery is charged it may overflow.
This won't hurt the battery, but the overflow is Sulphuric Acid and it will eat into just about anything it touches.
Next time your up for batteries go for sealed AGM batteries.
Cheers, ozjohn.

The Rat · Member

I have always filled up my batteries to the bottom of the filler holes.No more or the battery can overflow when it warms up.Correct me if I am wrong.We all learn something new everyday.

milo · Guru

i use the non maintence batteries ..

Cee · Senior Member

Thanks for the replies. I did consider putting gel batteries in the van, but as it's a second hand van, the previous owner welder steel plate holders for the batteries and the gel batteries were considerably larger and couldn't fit the brackets.

Thanks again for the tips, much appreciated.

Keep Smiling smile

wizz97 · Newbie

Use a strip of cardboard and dip into cell. Should be 10mm above plates, no more. By the way what rating is on the batteries. I ask because I see so many starting batteries being passed off as deep cycle. If it has a CCA rating on it it aint no deep cycle. I hope there not in the cabin area, very dangerous. As someone mentioned AGM are dearer but charge quiker and are more forgiving if flattened. Usually a ten year service life.