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Size 207x175x190 480 amps 45AH
Yes, in theory. The 45Ah will be physically bigger, so you need the correct space and fastening. There will be no problems with charging or with other equipment on the vehicle. It will give you more starts and last longer with the lights on and stereo playing with the engine off.
Answer 1No difference, but cold cranking amps is what is in battery to start. Answer 2Answer 1 is correct so far as amps are amps. However, the ambient temperature to which the battery is exposed greatly affects the amount of amps and rate at which current can be released. Therefore, most batteries have specifications on a decal for the cranking amps for which they are capable.The first spec ["Cranking Amps"] is at a "normal" temperature of [I think] 70 degrees F. The second spec ["Cold Cranking Amps] is at freezing [32 degrees F, or 0 degrees C].Since the battery output is lower at lower temperatures, the Cold Cranking Amps will be less than the Cranking Amps.j3hAs per the JIS specification for automotive batteries, Cold Cranking Current in Amps is tested at -18deg C and not at 0deg C. depending on the different Ah capacity, each 12V battery will have different CCA amps and durationThe battery will be brought to -18 deg C and then it will be discharged with the specified current, say 350, 400 ,450 A until the voltage on discharge drops down to the specified value. The duration in secs to reach the end voltage is noted and compared with the specified values in the spec.