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Switched Battery Box 2xAA (3V)

Product Code:MMP-0157

£1.99
Ex.Tax £1.66

Availability: 97

Switched Battery Box 2xAA (3V)
Questions1 Answers1 | Expand All
Typically how long will two AAs last?
I appreciate that this will be a very wide range as batteries vary hugely and Pi battery uses vary hugely. But: are we talking minutes? hours? days? Thanks!
Richard
  • Well to start with, you can't run a Pi from 2x AA batteries as they will only provide 3V. You need 5V to power the Pi. 

    So I'll assume you are going to use a step up converter.

    The Pi on average usage may use about 1A @ 5V (these values will vary as you have already said) - So that is a power usage of about 5W

    AA batteris can supply 1.5V @ 2A for 1 hour (amperage can vary). So thats about 3W for 1 hour. 2 AA batteries is therefor 6W for 1 hour. Take into account some energy loss from the step-up converter (we'll say bout 90% efficiency). This means after stepping up the 3v to 5v you'll be at about 5.4W for 1 hour.

    Therfore, 2xAA batteries could last for about 1 hour powering the Pi.
    ModMyPi LTD
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This battery box is designed for use as a nice switchable, portable power pack, and fits any two alkaline or rechargeable AA batteries in series. The body is moulded in black ABS Resin and has a slide on detachable lid which can be locked for extra security through use of a small provided screw. It even includes a very useful miniature on-off slide switch which is very handy for wiring to projects that don't have a switch! Connection is via two flexible stranded red (positive) & black (negative) 26AWG wire leads, which are approximately 150mm in length.

The two batteries are held in series, for a nominal output of 3V DC (AA Batteries @ 1.5V each).
 
Specification
  • Battery Cell Size AA
  • Number of Cells 2
  • Body Material ABS Resin
  • Height 19.0 mm, Length 68.0 mm, Width 33.0 mm
  • Terminal Type Wire Lead
  • Type Battery Box
  • Weight 0.01900 kg

 

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