Battery indicator

Green is good. It shows a battery in good condition and charged. No idea how accurate they are though.

I think it's a hygrometer, it displays the specific gravity of the electrolyte and therefor the charge state.

The user and all related content has been Deleted User

The user and all related content has been Deleted User

Quiet right hydrometer rather than hygrometer. Auto correct can be fiendish. 👍

it only looks at one cell anyway .....

So that's a one in six chance of knowing a little of the state of the battery. In my case this indicator is built into the screw top of the cell so can you use it to check the others or does it only fit that one cell?

probably true, just replaced my battery after it failed when operating new mover, it was 11 years old, but was still showing bright green, it had 2 windows, in all fairness it was probably still ok to run internal lights etc, just not up to operating the mover. It was one of those sealed type so no chance of checking individual cells with the hydrometer.

If you want to keep an eye on the state of a battery, especially for off grid use, you are better off fitting a good battery meter.

Nasa Marine sell a range of these

peedee

The only sensible thing you can do with a battery is to monitor its voltage when on EHU and when stand-alone. I researched battery monitors for our golf club professional and wasn’t convinced by any of them. The best way to check if a battery is performing is to put a load on it and see how long before the lights go dim.