b********i
发帖数: 761 | | a******o
发帖数: 16625 | 2 一般每个牌子只有一个型号适合你的车，买电池的地方可以查到，雾水个毛。
【在 b********i 的大作中提到】
: 打算换电池，可一头雾水。
| b********i
发帖数: 761 | 3 查了呀，适合车的电池还是有好几种， CCA有400、500等等
【在 a******o 的大作中提到】
: 一般每个牌子只有一个型号适合你的车，买电池的地方可以查到，雾水个毛。
| b******s
发帖数: 5329 | 4 原来研究过，这个CCA越大，好像在冷天启动车的时候越好。 | n******e
发帖数: 40 | 5 High CCA may reduce your battery usage life because of thin electrodes and
high electrode counts. But it does improve cold temperature performance. So
buy the one meet your vehicle spec. No need to pay extra. | a******o
发帖数: 16625 | 6 http://mechanics.stackexchange.com/questions/312/pros-cons-of-h
In most cases, the stock-size battery is correct, and that's what you should
stick with.
A smaller battery is likely to fail you sooner, unless you live somewhere
without a winter (Hilo?).
A larger battery is an extra expense, extra toxins, extra weight, and won't
give you dramatically longer life.
CCA (cold cranking amps) is the main thing to pay attention to. This is a
measure of how much current the battery can provide at 0 deg F, as @Pangea
points out. Batteries work better when they are warm, so the colder it gets,
the less current it can provide.
Starting an engine requires a lot of current, over a very short time.
Meanwhile, cold engines are harder to start, requiring more power to get
them going.
As batteries age, their internal resistance increases, reducing CCA. Total
capacity decreases at the same time. This is why a newer battery can start
your car in any weather, even if you leave the headlights on overnight,
while an old battery might only start the car when fully charged, in good
weather.
Starter batteries are optimized for short-duration, high-current draws,
followed immediately by recharging. They are built with thinner plates with
more surface area, which speeds up the chemical reactions that release the
energy. If you draw them down to 1/2 charge, and then leave them like that
for a while, hard crystals will form on the plates, which won't re-desolve
easily on recharging. That reduces capacity and CCA over time. So, keep your
starter battery fully charged, and avoid dropping below 80% during non-
starter usage.
(Deep-cycle batteries, like on golf carts, fork lifts, some boats, some RVs
are able to tolerate being discharged deeper and left that way longer than
starter batteries, but they really don't like a high-current draw like for
starting an engine. Best to draw on them gently, and never below 50% if you
can help it.)
So, a regular car battery is not a good device for running appliances for a
long time, without the engine running. However, a stock car stereo doesn't
draw much current, so you can probably get away with it for a while without
a problem. But if you leave it on all night, you may drain your starter
battery enough to damage it.
Increasing your battery size will allow you to run those appliances for a
little longer, but it's still not the right technology.
In an RV or boat, you have a starter battery and a separate "house" battery,
which is deep-cycle. Then use a battery isolator switch to use only the
starter to start, then recharge it, then recharge the house battery from the
alternator. (You can also use the house battery to assist the starter when
the starter battery is low.) Some people build these in to their cars if
they have really big stereos, or a small camping setup with fridge in a van
or pick-up camper. You can learn more from RV articles, like this one: http://www.phrannie.org/battery.html | e*****r
发帖数: 1027 | 7 大于等于spec,太多了也浪费用不到
【在 b********i 的大作中提到】
: 打算换电池，可一头雾水。
| b********i
发帖数: 761 | | z*****8
发帖数: 2546 | 9 issues with different one: |
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