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An electric battery is a device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy

5
votes
3answers
Old batteries (I mean AA, AAA -sized 1.5v ones) usually have some residual energy, which can be used, for example, to charge mobile phones/pads. I have seen some schematics on the Net, but all of … them try to connect old batteries in series without checking for really bad ones. I was thinking about building smarter power source using old batteries, but my knowledge is not enough to choose the …
asked Aug 26 '13 by Roman Susi
2
votes
2answers
For my "prolonging life of old batteries" project I decided to try a switching DC-DC converter. I've got a couple of Recom's R-7805s (datasheet: http://www.recom-international.com/pdf/Innoline/R-78xx … -0.5.pdf ), which are capable of 5V at 500mA output. It is choosen over linear regulator, because I want to lose less energy to heat. However, when connecting 8 old AAA batteries (about 8.6 V) in …
asked Oct 12 '13 by Roman Susi