- Have noticed that pulling battery and putting back in followed by
pulling plug from wall and putting back in usually results in as close
to a full charge as possible.
I had a problem RL-800 where under those conditions it was overcharging
Friendly sent me a kit to replace a prom chip, and the issue seems to
If you are concerned about a full charge, you could do what I did to
diagnose the problem: open the battery pack and attach leads to the
two batt clips. I attached an insulated plug to the leads, and can
now check the voltage directly at the battery.
Before the problem was corrected, an interruption in power would start
the charging cycle even with a fully charged battery. The first
indication of a problem was that the battery was still charging after
30+ hours, the other was that the battery pack was warm. I checked the
voltage and it was ~30V. That's way too high for a gell cell.
Since the repair I have never had the problem again. The mower now
fully charges, then cuts back to a safe maintenance voltage ~13.8V
The fast (4-6 hour) charger works great. I have also monitored the
voltage on teh battery pack using this charger. After the quick
charge, it cuts back to a maintenance mode that includes a slow pulse
charge, where the charger applies a charging voltage, then removes it
and monitores the voltage fallback, then applies it again. It works
--- In RoboMower@yahoogroups.com, Stuart Cracraft <cracraft@c...> wrote:
> Have noticed that pulling battery and putting back in followed by
> pulling plug from wall and putting back in usually results in as
> to a full charge as possible.