Long test eq cycle

I have a D8 flooded lead acid battery 1400CCA and 255Ah capacity. it is 6 years old on a boat with a 3 stage 12 amp charger which is on all the time when the boat is not in use.
battery is now very low in specific Gravity 1175 less than 40% capacity. it’s voltage 3 days after a full charge is .  this is far too high and we suspected sulfation to possibly be the cause of the higher voltage.(we read this somewhere)
we then overcharged it at 16 volts and it only drew 3 amps . After about 17 hours the SG had gone up to above 1200 about a 50% charge. a remarkable improvement.
my question to you all is why is the battery voltage still high on open circuit and why is there only 3 amps of charge at 16volts. should we continue to overcharge it ?
Hugh

The equalizer is definitely the most important piece of equipment in your audio rack! Most transceivers do an excellent job of passing all the midrange frequencies between 300Hz ~ usually with an added dominance between 500Hz ~ 800Hz. Unfortunately, most stock transmitters roll-off the bass frequencies below about 150Hz and down, as well as the high frequencies above about and up. So, we need to do basically three things:

* Reduce the Midrange
* Increase the Bass
* Increase the Treble

Taking a look once again at GRAPH 1 and GRAPH 2 above, you can see what an EQ can accomplish when set up. Below is a graphical representation of what EQing I had to implement in order to get some flatness out of my Kenwood TS-850S/DSP-100 after passing through its . and DSP filtering.

Long test eq cycle

long test eq cycle

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