The charger is very good when charging LiIon, but the silent halving of charge current when time sharing it not that nice.
For NiMH is works perfectly with 2000mAh eneloops, but the high capacity cells are terminated premature, again it has the lower charge current when time sharing.
The internal resistance do not really work when testing it.
The mAh display is not that precise in all situations and faulty when charging 4 batteries.
The usb charger output works fine, but cannot deliver the rated current. The current is fine compared to the coding of the usb.
第三項的電池內阻 do not really work （真的不行）對於有想測內阻的人還是不要存著太大希望。
我有用過幾台遙控模型用的充電器，其功能與售價都比這 SC4 要強，當然也能顯示容量與內阻的數值，真去做比較每一台所顯示的內阻數值都不一樣。
因為電池內阻分成直流測法與交流測法兩種，先說直流測法實際上只有比較參考用無法像交流測法成為業界標準。
直流測法的公式是：（充電時電壓 - 無充電電壓） / 充電電流 = 充電直流內阻，（無放電電壓 - 放電時電壓） / 放電電流 = 放電直流內阻，簡寫為 ΔV / I = R。
這個直流內阻常常是充電時與放電時不一樣，不同電壓時不一樣，不同電流時也不一樣，這種測法只能選擇相近的電壓與電流值來做比較或挑選。
所有功能較強的充電器都會運算顯示此內阻數值來，每一台全部都是直流測法，相對於交流測法全都能說是不準的。
而交流測法的標準是 1KHz 50mA 的條件下去測試內阻，雖然電池電量與溫度也會影響到交流阻抗但相對於直流測法會比較ㄧ致與公正性。
With 4 cells the current is half the selected current, the charge looks fine enough.
Display shows: 3299mAh 55mOhm 4:21, 201mAh 55mOhm 4:10, 68mAh 56mOhm 4:18, 66mAh 43mOhm 4:09
I did not make an error in the above, only the first slot shows correct capacity. As can be seen on the charge time the other slots where charged with similar amount of current, but the mAh counter must have a software bug.
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發表於 2018-3-31 11:36:43
發表於 2018-3-31 15:08:15
發表於 2018-3-31 15:43:54
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