Silver72

Is it ok to charge a battery while in the car and all the cables are connected. It is such a pain to remove the battery...

fast idle

i do it on my 75 (pre computers)

JRS 73

I've done it with no problems.

Star79

Just be careful to keep your charger terminals away from anything they can ground on (like the metal frame/screws of the storage compartment).

68/70Vette

For a 72, you should be able to safely charge it in place. Some battery chargers are "noisy," they can produce voltage spikes from their internal regulators (read this cheap battery charger). For later model cars with a lot of computerized stuff, it would be prudent to disconnect the battery from the cars electricals during charging.

Also, a lead acid battery, the kinds used in cars, will loose a significant amount of it's capacity if it's ever allowed to go completely dead (flat). I read someplace that a lead acid car battery can loose 1/3 of it's capacity if it's allowed to go completely dead. This seems to be about what my experience has been.

If you have dead battery problelm, solve the problem. Then think about throwing the rejuvinated battery away and buying a new one.

Sharky Guam

Yes, it is safe. However, it is better to disconnect one terminal prior to charging. That will prevent any sensitive electtrical circuits from being affected by the voltage spikes.