beppington
Elite Member
I have a one-year old Walmart 12V deep cycle battery I just charged overnight with a Sears DieHard charger I've had for over a decade. I've never felt real knowledgable about battery charging; Just connect it up overnight & hope for the best. I did read the manual but never used the charger often enough to feel like I really knew what to expect/ whether I was really doing it right.
This time the deep cycle battery started boiling
The charger has three switches:
- 6V / 12V
- "Automatic Regular" / "Automatic Deep Cycle" / "Manual"
- 2 AMP / 10 AMP / Engine Start (which is 60 amps)
Per the charger's book, I set it on 12V, Automatic Deep Cycle, & 10 AMP. And the battery boiled. When I checked the battery this morning after charging overnight, the meter display, instead of showing its green "Full Charge" light with the needle pointing to 100% charge, it showed maybe 75% charge & of course the battery was boiling.
Is it normal/ OK for a battery to boil while charging? Did I do something wrong? Could the battery already be a dud?
This is a marine deep cycle battery that was used only 2 or 3 times last year, then sat until last weekend when I charged it just for a few hours (no boiling). I figured that was good enough for then, then went to do a good, full charge last night.
Thank you ...
This time the deep cycle battery started boiling
The charger has three switches:
- 6V / 12V
- "Automatic Regular" / "Automatic Deep Cycle" / "Manual"
- 2 AMP / 10 AMP / Engine Start (which is 60 amps)
Per the charger's book, I set it on 12V, Automatic Deep Cycle, & 10 AMP. And the battery boiled. When I checked the battery this morning after charging overnight, the meter display, instead of showing its green "Full Charge" light with the needle pointing to 100% charge, it showed maybe 75% charge & of course the battery was boiling.
Is it normal/ OK for a battery to boil while charging? Did I do something wrong? Could the battery already be a dud?
This is a marine deep cycle battery that was used only 2 or 3 times last year, then sat until last weekend when I charged it just for a few hours (no boiling). I figured that was good enough for then, then went to do a good, full charge last night.
Thank you ...