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5V UPS for Raspberry Pi: Difference between revisions
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→Possible solutions for UPS / Battery types
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Although it initially seems that using Li-On batteries would be a great idea it turned out as a terrible idea. Main problem with Li-On batteries are that you need high current UPS device which I was unable to find out on the market (all devices are able to provide 1A current at most). So you would need to make your UPS completely yourself from one AC-DC converter (you will probably not be able to find 3.7V converter on the market so you will need to use AC-DC converter and than DC-DC converter), you also need a charger and step-up DC-DC converter to 5V volts. Li-On batteries also has an issue with exposiveness if you connect anything wrongly not mentioning relatively high price of them. | Although it initially seems that using Li-On batteries would be a great idea it turned out as a terrible idea. Main problem with Li-On batteries are that you need high current UPS device which I was unable to find out on the market (all devices are able to provide 1A current at most). So you would need to make your UPS completely yourself from one AC-DC converter (you will probably not be able to find 3.7V converter on the market so you will need to use AC-DC converter and than DC-DC converter), you also need a charger and step-up DC-DC converter to 5V volts. Li-On batteries also has an issue with exposiveness if you connect anything wrongly not mentioning relatively high price of them. | ||
So because Li-On batteries are expansive and neccesary devices are not on the market (that means you would have to build them yourself) I recommend usage of cheap Lead-Acid batteries. It is not difficult to buy your Lead-Acid battery in any hobby market for fraction of the price of | So because Li-On batteries are expansive and neccesary devices are not on the market (that means you would have to build them yourself) I recommend usage of cheap Lead-Acid batteries. It is not difficult to buy your Lead-Acid battery in any hobby market for fraction of the price of Li-On battery (e.g. I bought in local store 12Volts 7Ah Lead-Acid battery for 15 USD). If you compare capacity of Lead-Acid and Li-On batteries please bear in mind they have different voltage. So If you get Li-On battery with 10,000mAh on 3.7V in the end on 5V you will get approximately 5,000mAh. But if you get a Lead-Acid battery with 7,000mAh on 12V in the end on 5V you will get 14,000mAh. So triple capacity at one third price. | ||
If you need some more info about Lead-Acid batteries please read [http://en.wikipedia.org/wiki/Lead%E2%80%93acid_battery Wikipedia article Lead–acid battery] | If you need some more info about Lead-Acid batteries please read [http://en.wikipedia.org/wiki/Lead%E2%80%93acid_battery Wikipedia article Lead–acid battery] | ||