看了一些资料，说是换电池时的CCA最好要大于或等于出厂时主机厂所配备的电池的CCA。
比如说有一辆车，出厂电池的CCA是720，但是后来换上了一块580 CCA的电池，那么问题来了：
1）有没有影响？影响大吗？
2）都有哪些影响？比如对于行车电脑、对于自动变速箱等等会可能存在什么样的影响？
如果没有一个general的说法，各位DX说一说具体的案例也可以啊！
附
CCA (Cold Cranking Amperes):
CCA is the most popular industry rating and is a
measurement of the current a fully charged battery
can deliver for 30 seconds and maintain a voltage of
7.2 volts (12 volt battery) at a temperature of -18°C.
CCA’s are important, but they are not the best measure
for warmer climates. They are the ratings used by the
battery industry to define a new battery’s ability to start
an engine in extremely cold temperatures.
评论
how much CCA do we really need to start a car?
The cranking current required to start an engine varies from vehicle to vehicle and is dependent on the engine size, circuit resistance, temperature, engine oil viscosity and the accessory loads. A four cylinder engine may require as much cranking current as an eight cylinder engine because it may need to crank faster to start. All these factors are considered when an original equipment (OE) battery is specified by the vehicle manufacturer.
In Australia it is not necessary to purchase a battery with higher CCA’s than the vehicle manufacturers specifications. The following chart from BCI (Battery Council International) gives several examples of the current demands made on a battery by electrical accessories within a vehicle.
Typical Current Loads of Passenger Cars
Igntiion: 2-9A
Radio 0.5-5A
Windshield Wipers: 7.5A
Headlamps (Low Beam, Dim): 17-18A
Headlamps (High Beam, Bright): 19-20A
Parking lights: 4-10A
Brake lights 6-11A
Interior lights: 2-4A
Bonnet Light: 0.5-1A
Horn: 4A
Power Window (One window): 5A
ABS Brakes: 14A Max
Boot Light: 0.5-1A
Blower (Heater, Air Conditioner): 10-14A
Heated Rear Window Defogger: 13-28A
Heated Seat: 4-5A
Power Seat Motor: 10-13A
Summer Starting (Petrol): 150-200A
Summer Starting (Diesel): 450-550A
Winter Starting (Petrol): 250-350A
Winter Starting Diesel: 700-800A
As this table shows, the need for excessive amounts of CCA to start the engine has changed due to advancements in vehicle technology such as gear reduction starter motors supported with low cut in alternators.
Delco Remy a leading auto electrical parts manufacturer in the USA place warnings about the risks of damage to their starter motors from excessive CCA.
这里还说美国的这家车用电气零部件制造商警告说当心过大的CCA会损伤启动机！？
评论
对变速箱应该没有什么影响吧，电池寿命可能会短
评论
excessive一词就是放屁，水喝多了还中毒呢
车子没那么金贵，常见的情况就是，越是精心伺候的车子，趴窝的时候你就越失望
评论
直接去电池店问。都是买一样CCA的。
那东西小了，打不着；大了，车也装不下。
评论
在其他参数 V/AH 一致的情况下 cca不会有巨大的差别 没听说因为cca过大烧了的。反而过小会导致冬天冷启动困难 影响电瓶寿命
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