What battery for 3.0 V6 1996?

If you still have the owners manual the vehicle specs page usually list the amp hour rating of the original battery - or - if the one in there is the original then you can read it right off of that. The replacement should be the same amp hour rating / cold crank amp rating as the spec. Many people move up to a premium battery at replacement time and go for a higher AH & CCA rating, especially in cold climates. If you have added some power drawing accessories like a sound system booster then a little bigger battery capacity won't be a bad idea.

Just don't go for the biggest is best. It is possible to have a battery with so much capacity that a low output alternator cannot bring it back up to fully charged on short trip driving.

What battery I should use for my Plymouth Grand Voyager 1996 3.0 V6. I mean how much Ah. Now I have 55 Ah but the battery has just broken.

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Hmmm - not sure I go along with that, Rufus T.

The starter on that small car is going to drain the same number of amp-hours (or watt-hours since the voltage will be pretty much the same) during starting whether the battery is small or large. The job of the alternator is to pump the battery back up by the same amount (i.e., replace the same number of amp-hours or watt-hours) that was lost (ignoring resistive losses, which actually will be less for the larger battery) during starting, plus power the running devices (same regardless of battery size). The battery's self-discharge (leakage that occurred while sitting since the last run) will be proportional to the size of the battery (everything else being equal), but that's a second- or third-order effect and will just about balance out with the improvements in resistive losses of the larger battery.

The only place where that smaller alternator would have more trouble with the larger battery is under the very stressful situation of charging a severely discharged battery (i.e., someone left the lights on overnight). However, an alternator should not be used to charge a discharged battery - a charger should be used to restore intial charge before starting the engine (though admittedly, you don't always have that choice).

IMO, the philosophy of buying the biggest battery that will fit is not wrong.

Bill Putney (to reply by e-mail, replace the last letter of the alphabet in my address with "x")

I have a 3.0 in an 88 New Yorker, and I put in the biggest Interstate Megatron they make for it. Don't have the number handy - but at

100,000 I removed the original battery (6 years old) and put in the first Megatron. At 212,000, and 16 years (10 years on battery), I replaced it (after my wife left the headlights on at -25C for a couple hours - and froze it)

This is the dumbest and most dangerous thing I've seen you write thus far.

Matt

Matthew:

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