Hi

 

I have a nice dead battery that I keep charging up every couple of weeks but I really need to buy a new one today as it is now dead. Right now the favorit has a 44ah but that is probably a bit on the small size, so I would like to get something with a bit more capacity. Does anyone know what the biggest capacity can be used in a Favorit?

There is no formula to pick the "biggest"capacity. I consider choosing the right battery. Some would say to choose the biggest battery that fits the size of the battery compartment. Some would say to choose a battery having the capacity recommended by the manufacturer. Ultimately it is a trade off between size, weight, cold cranking Amps, capacity, and price.

 

The main role of the battery is to crank the engine. This is where the Cold-Cranking Amps comes into play. The bigger number of Amps the bigger number of cranking especially in very cold weather. The cold-cranking amps also refer to the number of amps a battery will be able to support for 30 seconds at -18 degree Celsius temperature (until battery voltage reaches below minimum level).

 

The secondary role is to continuously supply minimum voltage needed to run a car should the car's alternator or fan belt fail. This is where the Reserve Capacity comes into play. The RC rating of a battery is listed in minutes. You may not find the RC rating on the battery because it is not usually printed on the label. Check the product literature or ask the store assistant to find out the true RC rating of a particular battery.

 

Do not be tempted to buy the cheapest brand because it could turn as the most expensive battery you've ever bought. Cheap batteries may also be loaded with defects and can also be poor performers. A frequent battery change will definitely suck up the money you've initially saved when you chose a cheap car battery.

 

Now enough theory. I would choose a 55-60 Ah battery. As for the brand, I would go with Bosch but that may be a subjective choice. The last one lasted me 6 years.

Thanks Ricardo

 

The last battery I put there was a Bosch and it served me well, probably about 6 years too like you. I will probably go with them again but with at least 55 like you suggest.