Before you charge it (if it isn't too late) make sure that the battery isn't frozen. Charging a frozen battery can cause it to explode, you know the rest here.
Dead battery syndrome
- Thread starter hdking
- Start date
Before you charge it (if it isn't too late) make sure that the battery isn't frozen. Charging a frozen battery can cause it to explode, you know the rest here.
That brings up a good question will the battery freeze while hooked to a tender?
I wouldnt think so but never had one to leave on a tender on in winter before
In short...NO. When a battery is discharged over roughly 50%, the electrolyte turns back into water and that will freeze. A charged battery will go quite low in temps without freezing but the starting capacity (CCA) wil be depleted by almost half of it's rated capacity.
Good info
FYI, A fully charged battery is the best defense against freezing:
Freezing:
Percent Chg Specific Gravity Freeze Pt(Fahrenheit)
100............... 1.265 ............... -75
76................. 1.225 .............. -35
74................. 1.150 ................ 5
0 ................. 1.100 ............... 18
<0 ................ 1.050 ............... 27
Excerpt from the Yuasa website
Last edited:
Ken S.
Active Member
I'm sure mine wasn't frozen then. It turned over some and clicked before I put the charger on.
Since your bike was in a garage, the battery tender' slow charge rate does have a tendancy to warm the electrolyte some due to the chemical reaction occurring, so overnight trickle if the room did not drop to 30 deg F or so, you should be good to go.
Just be aware, if a battery has been deep discharged all the way once or twice, it may never really recover it's full CCA ability, so if the battery is over 5-6 years old, was not introduced to the battery tender until late, and likely suffered thru several deep discharges...probably be good to start thinking about replacing it, as a precaution. Do run the user "Cold Cranking Test" posted earlier in this thread to be sure.