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標題: A123 - 2S1P [打印本頁]

作者: gwinanthony1985 時間: 2010-1-15 23:54
標題: A123 - 2S1P
本帖最後由 gwinanthony1985 於 2010-1-16 00:09 編輯

is better than LIPO cells?

作者: hardmankam 時間: 2010-1-16 00:56
I tried both ... Lipo has better punch than A123.

作者: ryancmlam 時間: 2010-1-16 07:06

I tried both ... Lipo has better punch than A123.
hardmankam 發表於 2010-1-16 00:56

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I think this feeling is mainly due to the different in their norminial voltage, LiPo is 7.4 and A124 (LiFe) is 6.6 only.

作者: gwinanthony1985 時間: 2010-1-16 10:54
how much is the LIPO battery now ?

作者: hardmankam 時間: 2010-1-16 11:04
本帖最後由 hardmankam 於 2010-1-16 11:05 編輯

I think this feeling is mainly due to the different in their norminial voltage, LiPo is 7.4 and A124 (LiFe) is 6.6 only.
ryancmlam 發表於 2010-1-16 07:06

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I compared A123 + 5.5R vs Lipo + 7.5R, A123 still feels a little 'soft'. Maybe the lipo has 35C+ discharge, A123 has only 30C discharge. The main advantage of A123 is it can charge at a very high current and its very safe.

gwinanthony1985: How much is Lipo?
Depends on mAh, brand and C... it can be from $200 to $600

作者: gwinanthony1985 時間: 2010-1-16 11:09

I compared A123 + 5.5R vs Lipo + 7.5R, A123 still feels a little 'soft'. Maybe the lipo has 35C+ discharge, A123 has only 30C discharge. The main advantage of A123 is it can charge at a very hig ...
hardmankam 發表於 2010-1-16 11:04

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Hi ching
When you said the C is larger, does it mean the battery can get fully charged faster?

Also if i buy a new r/c car at KWS, will i get discount on batteries? Thanks!

作者: hardmankam 時間: 2010-1-16 12:12
本帖最後由 hardmankam 於 2010-1-16 12:13 編輯

C is larger means the battery can discharge at a higher rate. It is NOT the same as charging. I usually charge at the mAh rating. For eg: 5000mAh, charge at 5A, 3500mAh, charge at 3.5A.

discount?... depends how good a talker you are to the store keeper.

what motor are you going to be running? ie how many turns?

作者: ryancmlam 時間: 2010-1-16 12:20
Just a supplement. Charging the battery at the specified mAh rating means you are charing the battery at 1C. e.g. charge a 5000mAh battery at 5A.

A higher C rating means the battery is capable to discharge at a higher current without demaging

作者: gwinanthony1985 時間: 2010-1-16 12:45
but what is the point of getting the battery discharged at a higher rate??

作者: ryancmlam 時間: 2010-1-16 12:48

but what is the point of getting the battery discharged at a higher rate??
gwinanthony1985 發表於 2010-1-16 12:45

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That means higher power (=voltage x current)

作者: gwinanthony1985 時間: 2010-1-16 12:54

That means higher power (=voltage x current)
ryancmlam 發表於 2010-1-16 12:48

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Oh you are talking about discharging when the r/c car is playing with the battery??

haha sorry you said discharging the battery at the charger.

sorry i am new ^^'' Thanks a lot for that !!

作者: gwinanthony1985 時間: 2010-1-16 12:56

C is larger means the battery can discharge at a higher rate. It is NOT the same as charging. I usually charge at the mAh rating. For eg: 5000mAh, charge at 5A, 3500mAh, charge at 3.5A.

discoun ...
hardmankam 發表於 2010-1-16 12:12

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i am thinking of getting Kyosho Inferno VE RTR.

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