Forgot to disconnect the battery in a car with a known short (whoops) and now it reads 0 volts. My charger won't charge it unless it's above 4 volts.

Can I connect it to another battery with some jumper cables for a bit to bring it up above 4 volts? I figured I'd ask before I blow up my garage smile.gif

Ed

It all depends on how long the battery was dead for. The best rule of thumb is, if it is left in a dead discharged state for any length of time, its junk, so at this point, you do not have any other choice. go ahead & try your idea & put it on a high charge to get the electrolyte going for a maximum of an hour, then go to a trickle charge. Remember to charge it when the battery is at room temperature & have it in a real well ventilated area.

A charging battery gives off hydrogen gas ( very explosive ) so be VERY VERY careful. Keep it WELL AWAY from an open flame such as a pilot light in a gas hot water heater or clothes dryer etc.

Be very careful! Hope this helps.

Jim graemlins/waving.gif

A.C.E.S. # 4996 ( aces member id kinda matches my 496 stroker )


Frame off red 71 Chevelle SS496 (balanced, blueprinted & decked 454 block, bored .060 from 4.25 to 4.31 & stroked from 4.00 to 4.25, edelbrock aluminum heads, 10.2:1CR, hydraulic roller 550 lift cam, eagle crank, true fulcrum roller rockers, billet double roller chain, airgap intake, demon 850dp with no choke, MSD 6AL, jet coated hookers, flowmaster 40’s, TH400 with extra clutches, shift kit & 3000 stall) Convertible with white stripes, top & interior loaded with factory options: TH400, cowl induction, power windows, locks, cruise, tilt, top, trunk, 12 bolt 373 posi, A/C, AM-FM 8 track, power drivers bucket seat, mirror map light, trunk, hood, glove box lights, on the wheel GM air pressure gauges, Delco Jac Pac 175 (under hood vacuum powered air compressor) with under dash Delco air pressure controller/regulator, complete with Jac Pac 175 air shocks.

http://chevelle.ogleonline.com/jim.htm

1952 Chevrolet 4 door Deluxe Sedan with a 216.5ci in line 6 with the last RAJO (RAcine JOe) Power Cylinder Head designed by grandfather in the 1940's. Joe designed, built & sold all over the world performance heads during the 10’s, 20's, 30's & 40's starting with an OVERHEAD VALVE CONVERSION HEAD for the Model T Ford flathead. Joe drove in the FIRST INDY 500 in 1911 as car # 8.

Watch for my SS496 Chevelle as a pace car at Indy in 2011 (100 years after Grandpa Joe) IF THEY WILL LET ME !

Also depends on battery make. I've pulled Interstate batteries out of vehicles with bad alt. and topped off the water, put 'em on a charger overnight. Nice 3-5 amp charge 12-15 hours and they last another 2-3 years at least. Kragen battery, forget it. It's junk. Old Diehard's are good too, new one's, junk. Just my 2cents(from experience)