- Jan 17, 2016
- Reaction score
- NSW Central Coast
- Members Ride
Not if you have a charger that goes to 'float' mode when the battery is charged.
I have 3 "Battery Fighter" s which are always connected when I am not using the cars. Inconvenient to be disconnecting/connecting when the car is needed, but far less inconvenient than a flat battery.
The alternator can pump out all sorts of volts to change the cars battery including zapping it when in a desulphation mode. Yes, the car's charging system can desulphate a bettery... As such, one must expect that Holden ensured all the devices powered by the battery are robust enough to cope with the voltages and waveforms pumped out by the alternator (especially the desulpation mode waveforms)...
So an external smart charger doesn't do anything worse than the alternator/generator would so there is no need to disconnect the battery from the vehicle.
As is, the workshop manual says the same though they do say to check that the battery cable terminals are tight... The manual also warn that if a battery has discharged to 65% of capacity (12.45v @ 25c) that it should be charged (using an external charger) before returning to service (driveing the car)...
I thought so.not with a charger that is designed to be attached while the battery is connected - old natty ones, not so much. modern trickle/maintenance chargers can be retrofitted to the vehicle permanently.
I never disconnect any of my SLA batteries if I'm trickling or fast charging them.