Weak hydrometer reading: what happens if...

[Kenton]

you add sulphuric acid to the cells? Would it not strengthen the electrolyte?

[Wotname]

Well yes it would but that won't help the battery regain charge.

The sg is just an indicator of the chemistry of the the + & - plates. A discharged battery has a different chemistry than a charged battery, the charge is not a direct function of the sg of the acid.

Tell doesn't permit a fuller explanation right now but I'm sure other will chime in or google will help.

[robert sailor]

Originally Posted by Wotname

Well yes it would but that won't help the battery regain charge.

The sg is just an indicator of the chemistry of the the + & - plates. A discharged battery has a different chemistry than a charged battery, the charge is not a direct function of the sg of the acid.

Tell doesn't permit a fuller explanation right now but I'm sure other will chime in or google will help.

Don't add acid..just water when needed, preferably distilled water. Consider equalizing your battery/batteries, might bring some life back.

[svlamorocha]

If you add acid then the sulphate that is sitting on the plates will harden there instead of turning into acid as the battery is charged
...

[john61ct]

As much as winding your odometer back helps your car last another 100k

[hellosailor]

Or pour in a box of epsom salt, that'll fix it. A hundred YoRube! videos surely wouldn't all be lying.(G)