1.6V 2500mWh镍锌充电电池评论(PK爱老婆)

musen

我自己也不了解这个电池，所以上网去找了一下测评，然后和大家分享一下这个新引入技术品的一些信息。该信息来自网上，一家之言，这边N多砖家，大家仁者见仁。

另：这个评论不是我写的，我只是简单翻译一下。

Showdown: PowerGenix NiZn vs. SANYO eneloop NiMH  PowerGenix的镍锌电池 Vs. 三洋爱老婆的镍氢电池


This review is from: PowerGenix ZRPGX-AA8 AA 1.6v 2500 mWh ZiNc High-Voltage Rechargeable Batteries -8 Pack (Green) (Electronics)

The product description of PowerGenix Nickel-Zinc Rechargeable AA cell promises many advantages over other rechargeable batteries: higher voltage, higher energy density, lighter weight, longer cycle life, and so on. But how does it stack up against the current gold-standard of low-self-discharge NiMH cell, the Sanyo Eneloop? Let's examine the following aspects:
这一段说，powergenix 的1.6V 2500mWh镍锌充电电池的产品描述中有提到许多其它充电电池没有的优点：高电压，高能量密度，轻的重量，长的充电周期，等等。但如果综合起来看，它和现在的金牌标准的低自放镍氢电池，三洋的爱老婆比起来怎么样呢？让我们从以下这些方面来比较


[Operating Voltage]
The NiZn cell has a nominal voltage of 1.65V, which is 30% higher than that of a NiMH cell (1.25V nominal). When freshly charged, its terminal voltage is even higher at 1.85V!
工作电压：镍锌充电电池正常工作电压是1.65V,比常规的镍氢电池的1.25V高出30%.当刚充完时，两个端极的电压甚至能高达1.85V!

[Power Density]
Since 'Power' is defined as 'Voltage * Current', most people may assume that "30% higher Voltage" translates to "30% higher Power". But it depends on the application:
功率密度:功率是用电压乘以电流来定义的，大多数人会认为：电压高30%等同于电器工作功率高30%.但其实是，这取决于你把电池用在哪里

- Most electronic gadgets (digital camera, MP3 player, etc) contain internal DC/DC regulators which operate in constant-power mode. If the battery voltage is higher, then input current will drop to maintain the same output power. That's why higher voltage alone does not make your digital camera shoot any faster.
(One exception is photo flash unit, which operates in constant-current mode. So in this case, 30% higher voltage does translate to 30% higher power and shorter cycle time)
许许多多的电子产品(数码相机, mp3机等) 有内部的直流调整功能，功能是让产品在一个稳定的功率状态工作。如果电池电压很高，直流调整功能会让工作电流降低以达到低电压时的电器工作功率。这就是为什么光是电压高不能说明问题。(但是闪光灯单元是工作在稳流状态，所以在这种情况下，30%高的电压的确意味着30%多的功率和更快的周期时间)

- For an unregulated appliance such as a flashlight or power tool, its current increases with voltage (although not linearly). A typical 2-AA flashlight bulb is rated for 2.3V * 0.5A = 1.15W. When you apply 3.6V to it, the current may increase to 0.65A, so the power consumption is now 3.6V * 0.65A = 2.3W. Twice the power means twice the heat. That's why the bulb may burn out in seconds.
对于没有电压调整功能的小电器，比如一些手电，电流会随电压上升而上升(虽然不是线性比关系)。一个简单的两节5号电手电的灯泡标称为2.3V*0.5A=1.15W. 当你加了3.6V的电压，电流就加大到大约0.65A,灯泡的功率消耗就达到了3.6V*0.65A=2.3W.当能量上升了一倍，热量也上升大概一倍。这就是为什么有时候灯泡几秒就烧了。

[Energy Density]
The PowerGenix AA cells are marketed as "2500 milli-WATT-hour" (energy capacity). Most people may confuse this with "2500 milli-Ampere-hour" (charge capacity). But the data sheet for NiZn AA cell shows that its current capacity is only 1500mAh (this is verified by my own testing). It turns out that an 1500mAh NiZn cell actually contains the same amount of energy as a 2000mAh SANYO eneloop AA cell:
能量密度：PowerGenix AA标称为 2500毫瓦时(能量容量单位). 许多人会把毫瓦时(能量容量单位)和毫安时(充放容量单位)混淆起来. 但是电池相关数据表显示，该电池的充电容量是1500mAh(我：指作者也自己测试核实过). 该电池的1500mAh充电容量，其实所承载的能量容量和三洋的2000mAh的爱老婆电池是相当的。见下面的计算公式。

- Energy in eneloop AA cell: 1.25V * 2000mAh = 2500mWh 三洋爱老婆电池能量容量
- Energy in PowerGenix AA cell: 1.65V * 1500mAh = 2475mWh PowerGenix AA cell电池能量容量

[Weight]
The weight of each NiZn AA cell (25g) is essentially the same as that for eneloop AA cell (27g). For certain applications, it is possible to use three NiZn cells (3*1.65=5V) to replace four NiMH cells (4*1.25V=5V). Doing so reduces battery weight by 25%, but it also shortens run time by 25%.
电池重量：每节该电池重量为25克，基本和爱老婆5号相近(27克). 在一些应用中，三节该电池能达到5V，所以可以代替四节爱老婆，这样可以省25%的电池重量，当然这样也就少了25%的电池能量。

musen

还没完，如果大家有兴趣接着要看中文，后一半明天再翻译

[Cycle Life]
Technical data found on PowerGenix web site says NiZn cells are rated for 200 cycles (at 100% deep-discharge). This is much shorter than the 1000 cycles cited for eneloop cells.
电池充电生命周期
在PowerGenix的官网上的技术数据显示，该电池在100%深度放的情况下，可以反复循环冲200次以上。与爱老婆标称的1000次比起来，。。。(明显作者这边是用爱老婆一代的)

I have tested a set of 4 PowerGenix AA cells. After subjecting them through 12-16 deep discharge cycles, the average charge capacity already dropped 5% from original value. In comparison, I have a set of 4 eneloop AA cells that have went through about 100 cycles in the past 2.5 years, and they still exhibit over 95% of original capacity.
我(作者)测试了一组四节该镍锌充电电池。在12~16次的深度放以后，平均充电容量比原始新值下降了5%.我(作者)有一组4节爱老婆电池，在过去的2年半时间里大概反复冲了100次吧，他们差不多还有95%的原容量(也就是下降了5%,和该镍锌下降了相同的量)

[Self-Discharge Rate]
In my long-term storage test after two months, a set of four NiZn cells retained 74% original charge capacity on average. This translates to about 13% loss per month, which is much better than that of ordinary high-capacity NiMH batteries (with capacity > 2500mAh). But it cannot compare to low-self-discharge NiMH cells.
控制自放电性能
我作了一个长期存测试实验，一组四节镍锌电池在两个月后平均还保存刚充完时74%的充电容量，相当于13%的自放电每个月。这和很多普通高容量镍氢电池比起来好不少，但是和那些低自放镍氢电池，就没法比了。

Previously, I have conducted storage test for several brands of LSD cells, including Sanyo eneloop, Rayovac Hybrid, and Kodak Pre-Charged. All those cells can retain 85-90% of original capacity after FIVE months in storage.
先前，我做过一个低自放各品牌镍氢电池存放后剩余电量比较，三洋的爱老婆，rayovac 混合型（注：这是以前飞人乔丹做广告的电池), 科达预充型。所有的这些低自放镍氢电池可以在5个月后仍保有相当于85%~90%的刚充完时的电量。

[Recharging Time]
The PowerGenix NiZn cells must be recharged using a specially designed PowerGenix NiZn Charger. The charger is called '1-hour', but it actually takes 2.5 hours to fully recharge a set of four 1500mAh cells.
充电时间

Eneloop (and all other brands of LSD cells) can be recharged using any good quality 'smart' NiMH charger. Depending on which charger you use, the charge time can be as short as 15 minutes, or as long as 8 hours.

[BOTTOM LINE] 总结
The only verifiable benefit for PowerGenix NiZn cell is its higher operation voltage. However, even this may turn out to be a curse rather than a blessing, as higher voltage can cause unregulated appliances to burn out.

If you have a digital camera that works well with eneloop, stay with it. Switching to NiZn will not offer more power, nor longer run time. Only if your camera does not work well with eneloop, then it is worthwhile to try NiZn cells as a last resort. But you better contact PowerGenix, and ask whether they will assume warranty liability for the use in your camera. Otherwise, try it at your own risk!


[Update after 14 months' usage] 购买使用14个月以后的更新
My first set of four NiZn cells was used for capacity testing and long-term self-discharge testing. They have gone though maybe 20-30 deep discharge/recharge cycles (discharged down to 0.9V only, not 0V) over the past year. As of right now, two out of four cells have already failed, suffering from voltage depression and rapid self-discharge problems. The other two suffered from reduced capacity (~1200mAh, down from the original 1500mAh). The PowerGenix '1-hour' charger needs to detect 1.9V during charging, before it can change from constant-current mode to constant-voltage mode. When voltage-depression hits a cell, its voltage cannot reach 1.9V during charging, so the NiZn charger will simply fry the cell!

musen

再占一下

mhl1683

也就是说，，，，

wangzhoukai

前排支持

huangq

我还以为自发的评测呢?谁发呢?介绍不可靠

icylove

昏。。。{:1_230:}

hhhsk

可以了

夾不死

我还以为自发的评测呢?谁发呢?介绍不可靠
huangq 发表于 2011-8-9 22:29

                               
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这个「介绍」的结论是贬低镍锌电池的。

MAGLITE

玩家有啥意义

电池界根本不看好镍锌电池，镍锌电池从发明不比镍镉玩多长时间，特性决定其寿命和安全性都不适合商品化。

国望堂

最少等1.2年

华电人

要是很有优势三洋早就上了。

pepsicool

不是有团购么

Airmage

好文啊！

sniq405

顶一下十五楼。好像说不如爱老公

aixiangsui

最后一段话很有意思，大意是说：
“一年前我买了四节电池，充放了20-30次，现在已经挂了2节（表现为电压过低和自放电太严重），剩下两节容量从1500mah缩减到1200mah。当电池容量缩水后，其电压无法达到充电截止电压1.9V，而powerGenix的充电器会继续充电，直到烧毁电池，powerGenix公司应该修改他们的充电器。”

山丘

以前好奇买过4接BPI镍锌电池套装，损耗太快，没用多少次就没什么容量了。不到1年就基本残废扔了。