View Full Version : Portable 12V Power Supplies?

06-23-2002, 11:19 PM
Posted by Vince Wilczynski.

Engineer on team #124, Whalers, from New London / Montville/ Williams School and Notheast Utilities / US Coast Guard Academy.

Posted on 11/2/2000 5:00 PM MST

One of the good things of using the 12V drill batteries is that we were never short of portable power supplies. Each year, we'd cut off the drill handles, attach a set of leads, and voila you have a great, rechargeable power supply to use for prototypes or single motor fine-tuning. Over the years, I've noticed our team's stock pile slowly diminish as the power supplies would be misplaced, coupled with the fact that the more recent kits didn't include drill batteries/chargers.

So my question to the group here.... has anyone come up with a useful, affordable, and non-wasteful 12V portable power supply. I just can't accept the 'make it fit alternative' of buying a perfectly good drill and cutting it in half just to make a power supply. Hmm.... maybe a quick new product for Innovation FIRST to put on the market....

06-23-2002, 11:19 PM
Posted by Thomas A. Frank.

Engineer on team #121, The Islanders/Rhode Warrior, from Middletown (RI) High School and Naval Undersea Warfare Center.

Posted on 11/3/2000 9:05 AM MST

In Reply to: Portable 12V Power Supplies? posted by Vince Wilczynski on 11/2/2000 5:00 PM MST:


Hit the news stand and buy a copy of 'Nuts and Volts'.

Go through the ads and find youself a nice sealed lead acid battery (kinda like what we've used in recent years for the robot...) and charger, and you've got yourself a portable power supply.

On the surplus market, these batteries are pretty cheap, and are available in many different sizes (if you find the 17amp-hr too large for your application).

Better than the Ni-Cd's we used to use, as they will take a great deal more abuse.

Tom Frank

06-23-2002, 11:19 PM
Posted by Joe Ross.   [PICTURE: SAME | NEW | HELP]

Engineer on team #330, Beach Bot 2001, from Hope Chapel Academy and J&F Machine (and hopefully others).

Posted on 11/4/2000 8:36 PM MST

In Reply to: Re: Portable 12V Power Supplies? posted by Thomas A. Frank on 11/3/2000 9:05 AM MST:

I agree with Tom about checking the surplus market. Around here, TRW has a monthly swap meet where we have been able to pick up 12V SLA batteries. The last year we were even able to get a battery identical to the kit batteries.

Joe Ross
Team 330