Battery charging

[dibble1]

Do I need to disconnect a flat battery when charging it? A friend said I should but I didn't last time I did it, (with no problem). Thanks.

[Old_Geezer]

I'd disconnect it. Easier to connect it to the charger, and no chance of an unexpected load on the battery whlst you're trying to charge it.

[TonyV]

almost best to disconnect

[SlackAlice]

Correct answer is to disconnect it as stated by Old Geezer and TonyV

But, I've done it. Only used a trickle charger though and wouldn't recommend a fast charger. make sure battery bay has good ventilation and you protect surrounding area from spillage and gassing damage.

[Graham-W]

I was once told that there was a slight chance of burning out the alternator if the battery was left connected whilst charging.
If you do disconnect the battery remember to get the radio code before you do.

[ChuckFickens]

Also make sure you have the code to to put back into your radio if required before disconnecting the battery.

[TonyV]

good call Chuck - otherwise another £5 to get code

[Toureman]

You must disconnect the battery on most modern high tech cars, there is a high risk of frying the cars electrics.

I do use my motorcycle battery charger on my car though, it takes longer but being a low charge input it does no damage.

http://www.theultimat...er-and-optimiser.aspx

[ChuckFickens]

To be fair, tony, good call to Graham-W as well as we both posted the same thing at the same time :)

[McMouse]

I once had a Rover 820 and an AA bloke disconnected the battery to do something and it bu99ered the engine management system.

[dibble1]

thanks you lot