I have a project where small size is very important. I have a tiny motor which needs 5 vdc, has an inrush current of about .2a and a continuous current of about .1a. It only needs to run three times for about one minute or so the capacity is not a big issue. The battery does not need to be rechargea…

How long do you need the battery to last ? A single cell in a clock battery can have a high stall current but last for a year.

I don't need the battery to last very long at all. Three minutes total usuage, and can be charged/bought for the single use event. The boost converter looks interesting, but seems to defy the purpose of the small battery.

seems to defy the purpose of the small battery. In what way?

You might want to investigate some of the coin cells - go to Digikey.com or Mouser.com for example and look at the specs for something like the CR2032 - 3v @ 240mah. Two of them in a holder would give you 6v which would be just right for one diode drop in series so you can't put the batteries in bac…

I don't think they can/should power a 100-200mA motor. The internal resistance, according to several datasheets, is ~10-40ohm. No harm in trying though. Leo..

I would suggest LR44 batteries (aka AG-13) which is small enough and perfectly powers the motor of those Hexbugs. datasheet http://data.energizer.com/PDFs/A76Z.pdf

Internal resistance of an LR44 is worse than a CR2032. Datasheet states a test discharge of <=200uA. 500 times less than what is required by OP. Leo..

DeucesAx: I don't need the battery to last very long at all. Three minutes total usuage, and can be charged/bought for the single use event. Sounds like you need a thermal battery. As used in stinger missiles. :o

Perhaps a coin cell in parallel with a supercap would do . 31723.pdf 50.36 KB Possibly a miniature lipo. They can be smaller than a postage stamp. Thin (1 mm to 2mm) to Ultrathin (0.5 mm) Rechargeable Lithium Polymer Cells... Thinnest ultra …

Smallest battery or set of batteries which supply 5v and 0.1A

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jremington March 25, 2016, 12:43am 2

You could use a single 1.2-1.5V cell of several types, and a very small boost converter to produce 5V.

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Smallest battery or set of batteries which supply 5v and 0.1A

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