-
A bad battery will show full voltage at rest. Load it down and the voltage drops very fast this also reduces amps as well. Not sure if the amps is actually reduced or just lower volts will not push amps out against any load resistance. Not that it really matters the effect is the same. Another sign of a bad battery is it takes a very short time to fully recharge from very low state of charge.
A car battery that drops below about 10.5 volts when cranking will not be able to crank the engine fast enough to start. Probably need a little more volts for older cars with point ignition and carburetors.
All my voltages assume a normal lead acid 12volt car battery.
Bill D
Last edited by Bill Dufour; 03-04-2024 at 10:50 AM.
Posting Permissions
- You may not post new threads
- You may not post replies
- You may not post attachments
- You may not edit your posts
-
Forum Rules
Reply With Quote