[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
Re: [ATM] Gell cell batteries
Tim Nott wrote:
>I have limited room in my 16'' mirror box underneath my mirror but I wanted
>to put in a gell cell battery to power a computer fan for cool down and a
>diagonal heater ( so I don't have wires lying around). The only one I can
>find that is flat enough is a 12V 2.2 Amp/hr one. Does anyone have ideas
>about whether this would be enough to get me though at least one full
>night's viewing before recharging?
>
That would give you 25 watts or so =2 amps for one hour - and 3 watts or
0.35 A for 6 hours. If you know the current consumptions of the fan and the
heater (in amps), you get some idea of how long an observing night you can
expect - but add some margin.
Could you put a larger battery in a corner inside your mirror box?
Nils Olof
_______________________________________________
ATM mailing list http://www.atmlist.net/