Originally Posted by markwesti
A temp . controller hydrometer ? I'll look into that .
The OTC 4619 has a little thermometer on the base telling you how much to add or subtract from the reading on the float.
Save the box it comes in to protect it.
Might not be totally accurate as far as actual specific gravity goes, but useful compared against itself to compare to baseline full charge readings when battery(s) are new.
When charging, the center cells get warmer than outside cells making the thermometer more important for an accurate reading.
Don't bother with the plastic hydrometers that claim to be temperature compensated. Both inaccurate and Imprecise.
is no object and accuracy is paramount, google
Bubbles like to stick to the float and throw off readings.
When cycling them deep, it will take longer than one suspects for specific gravity to max out. Most automatic chargers will need to be restarted after loading batteries to reduce voltage and restarting.
Trojan upped their recommended equalization
voltage from 15.5v to 16.2v recently.