Reserve Capacity Question (Battery)
I am trying to compare battery's and they do not make it easy. Battery states: Reserve Capacity as 125 minutes at 75A. I need to know what it is at 25A? Can anyone help? Please.
Forum Discussion
Reserve capacity is figuring out how long a battery can last powering a car with fuel pump and ignition load (no lights A/C or other loads) until the engine utterly stops dead in the road.
Sucking down a battery to ten volts is hard on it especially if it's a thin plate engine starting battery. There are legitimate reasons to want a high R/C like extending runtime in very rural areas. But if that is your concern use multiple batteries.
This value can assist a buyer who wants to judge if CCA is impinging on ampere hour rating. But by itself it is almost worthless if extremely cold cranking amperage is vital or low amperage discharge capacity is concerned.
For cycling, ampere hours / weight is a lot more valid. As is the name of the manufacturer. Cold cranking amperage is the vital value when a battery attempts to crank over something tough like a diesel.
An intriguing reference is to compare a battery's 20 hour rate to it's 100 hour rate. Smaller batteries end up in fractions of an ampere. You'll never see a smaller battery's 100 hour rate. It's like sneaking up behind it and yanking down it's drawers. Or, maybe inquiring about plate thickness.
Sucking down a battery to ten volts is hard on it especially if it's a thin plate engine starting battery. There are legitimate reasons to want a high R/C like extending runtime in very rural areas. But if that is your concern use multiple batteries.
This value can assist a buyer who wants to judge if CCA is impinging on ampere hour rating. But by itself it is almost worthless if extremely cold cranking amperage is vital or low amperage discharge capacity is concerned.
For cycling, ampere hours / weight is a lot more valid. As is the name of the manufacturer. Cold cranking amperage is the vital value when a battery attempts to crank over something tough like a diesel.
An intriguing reference is to compare a battery's 20 hour rate to it's 100 hour rate. Smaller batteries end up in fractions of an ampere. You'll never see a smaller battery's 100 hour rate. It's like sneaking up behind it and yanking down it's drawers. Or, maybe inquiring about plate thickness.
