CW2 PiUSV / PiUPS Experiences - Raspberry Pi Forums

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hi,

bit of feedback wider community if reasearching , looking @ cw2 possible ups device rpi.

bought 1 in car project, , impressed, appears board has (in view) major flaw. experiences, when rpi has power, there draw batteries. furthermore, suspect draws power when rpi has been shut down (although don't know sure).

basically, me, idea when cars ignition on rpi power car battery (obviously 5v not 12v). when ignition switched off, rpi receive power ups batteries short while before being shut down in controlled fashion. worked find until 6xaa batteries drained in short period of time.

discussion can seen on thread, http://piusv.de/forum/viewtopic.php?f=27&t=239 although there seems no answer in sight.

i'm not saying don't buy one, word of caution, wish had done more research beforehand.

hth.
jon.

from reading posts in forum.. appear have constant current draw batteries of approx 3.6ma when not powered batteries. quick math.. 3.6x24x30= gives 2.6 amps of draw in month. pretty capacity of modern aa batteries, , several weeks month of use/draw time sounds others complaining about.

have ups pi of own design.. , take educated guess adc voltage divider eating current, , forgot test long term.

more longer term use of non-rechargeable batteries.. idle current should close 0, maybe 0.1 0.2ma battery life reasonable (or @ least year or two).

regards,
-moses


raspberrypi



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