What batteries ?

[norm]

Hi,

Quick question, can someone tell me what batteries are used in the dob fans ?

Thanks, Norm.

[RAJAH235]

Hi Norm, Slice of Heaven, (geoff), uses old cordless drill nicads,(7.2 v or 9.6 volts)? Others use 12 volt jump starter batteries. Depends on,(what's your main battery)?, I suppose.
The fans, on 12 volts, take about 170 mA, so are fairly savage on low/lower capacity batteries.
Still, you don't run the fan all night, do you?
HTH. :D L.

[slice of heaven]

Their actually 12v Laurie. From 1.3 to 2 amps. I had about a dozen laying around and put them to use on the dob to run the fan, Telrad and a couple of leds. :)

As Laurie said Norm, whatever you have will run them, maybe the jumpstarter pack would be the way to go if your going to buy something specifically for the job.

[RAJAH235]

Ta Geoff. Wasn't sure about voltage.
Norm, you can always run a current/voltage regulator/PWM, as a speed controller. :D L.

[norm]

Hi Guys,

Thanks for the info. Much appreciated.