Batteries

[Antony98]

I was sitting in lunch today and thinking about what I could use to power my portable when I start building it. Not long after that I had a flash of inspiration I checked my phone battery and it was one of these http://www.amazon.com/Sony-Ericsson-BST ... B0009SHN30. With 3.6v and 900mAh if I could wire two of these in series and wire two series in parallel wouldn't that work the same as a 7.2v 1800mAh battery. Plus their small, Li-Poly and have protection circuits built in. Oh and their cheap on eBay they go from $4-9 or Amazon had them for a buck-fifty four of these would be way cheaper then the alternatives I've seen.

edit:my math was wrong fixed it.

[samjc3]

1800 mah wont power anything for very long. like 30 minutes max. also, i think 7.2 volts is to low. go for 3.7 volt battery packs instead, as that would get you closer to the 7.5v you want.

[eurddrue]

You can't add voltage and amperage at the same time. Here's a good battery : long url

[bicostp]

You can't add voltage and amperage at the same time. Here's a good battery : long url

Yes you can, with 4 batteries.

With 3.6v and 900mAh if I could wire two of these in series and wire two series in parallel wouldn't that work the same as a 7.2v 1800mAh battery.

[Antony98]

OK that's what I thought but just to make sure before I order the batteries. Could I run a snes or nes portable on 8 of these wired like I was talking about earlier? What would the battery life be like? Maybe 3-3.5 hours? Or should I go with the other battery I was linked to because I'm a bit strapped for cash and $18 shipped is cheaper then $30 shipped.

[eurddrue]

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