Extra battery ?

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by pilacs, Apr 3, 2013.

  1. pilacs

    pilacs Adventurer

    Nov 8, 2008
    Make it short I have to sleep with a CPAP machine.
    For my next trip I want to be able to power my machine from a extra gel battery. I have a pigtale from the main battery for the quick disconnect charger. Can I plug in my second battrey while I'm riding to charge it up for the night or I need one of those special isolator switch for it?
    Thanks in advance.
  2. Warin

    Warin Retired

    Aug 30, 2012
    Ideally .. a special isolator.

    Being practical and cheap - once the bike is running plug in the other battery and ride away. I assume that you will be running the bike for more than say 20 minutes when you do this and won't be running spotlights, hair dryer and fridge at the time ? :D Do remember to unplug it once you stop. :baldy
  3. FakeName

    FakeName Wile E Coyote SuperGenius

    Jan 1, 2007
    San Diego
    Safe to assume the CPAP battery is 12v?
  4. Unstable Rider

    Unstable Rider Moto Fartografist

    Jul 23, 2010
    Twin Cities, Minnesota USA
    One of these DEKA sealed glass mat batteries will run my 12 volt CPAP machine for two 8 hour nights and still start my KLR on the last morning.

    I would never likely stay more than one night somewhere, but I tested it for two while at home and had good results. The entire project pretty cheap. I do carry a tiny charger along in the event I would hit a camp site with electric. Basically a wall wart 12 volt adapter, about 800 milliamp with alligator clips. Low tech sometimes best.

    Just trying to help, I know what a boat anchor the dang CPAP stuff is.

    Deka batteries:


    This stuff also helped get it done.

    Electrical leads to run an easy 12 volt cigarette lighter accessory socket for your bike:

    Nifty 25 foot extension:

    Generic plug n play socket: