Differences
This shows you the differences between two versions of the page.
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alt:battery [2012/11/11 17:40] sidaw created |
alt:battery [2012/11/11 17:49] (current) sidaw |
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| ====What is wrong with rechargeable ==== | ====What is wrong with rechargeable ==== | ||
| - | The first thing is self-discharge without any use, the self-discharge rate: | + | The first thing is self-discharge without any use. Here are some self-discharge rates for various batteries: |
| NiCd: 10%/month | NiCd: 10%/month | ||
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| NiFe: 20-30%/month | NiFe: 20-30%/month | ||
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| Li-ion: 8%/month at 21 °C | Li-ion: 8%/month at 21 °C | ||
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| http://batteryuniversity.com/learn/article/whats_the_best_battery provides a more detailed table and more properties. | http://batteryuniversity.com/learn/article/whats_the_best_battery provides a more detailed table and more properties. | ||
| + | Second, they have smaller capacities to begin with, often by a factor of 2-3. | ||
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| + | http://batteryuniversity.com/learn/article/choices_of_primary_batteries | ||
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| + | ===== Some anecdotes ==== | ||
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| + | 1) rechargeable leakage is a problem that I'm sure many has experienced over the years. | ||
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| + | 2) Sometimes devices get lost, so your investment is not worth it even if it would have in an ideal world. After my bikelight ran out of battery (after a year of regular use), I replaced them with some rechargeables. In 2 weeks, they are already barely lighting up, and after another 2 weeks, the light got stolen. | ||
| + | 3) Environment: one of the better rechargeable, NiCd is also the most environmentally harmful. It is already partially banned in the EU. | ||