18.05.2014
Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. I turned off the charger and the battery was making a quiet hissing noise, like water in a pipe, and it made this noise for about 10 minutes, so I levered off a cover and there were some holes. These holes were completely empty, and the battery had a strong smell, like sulfuric acid with these holes open. I don't know anything about the battery, the label is filthy, but it's a 12V car battery and its sat for about 8 months. You should recycle dead car batteries - the local scrap merchant will take it and pay a couple of dollars.
The "strong smell, like sulfuric acid" is in fact sulfuric acid, which is the acid component in a lead-acid battery.
Not the answer you're looking for?Browse other questions tagged battery charging or ask your own question. All Cascade Audio Engineering APS power supplies feature regulated and filtered outputs that provide clean power without the slightest hint of noise. Because all APS power supplies utilize an advanced switching design, there is no low frequency transformer hum. Optional: The APS IQ4 smart charge controller offers automatic charging control for APS power converters, providing longer and safer use of your systems battery. All manuals, installation and technical data sheets are available as downloadable PDF files. Is there an alternative to \ref or \eqref that omits the chapter number without changing the overall behaviour? I left it overnight and came back the next afternoon, and the battery was hot to the touch, and the charger was cycling on and off, with the current about 4A.

The charger goes up to about 12A on the ammeter gauge, which is the maximum, and then trips, if I try to charge the battery on High or Low at 12v, and High at 6v.
Sit the battery on a piece of wood or a mat when charging, as a cold cement floor can do [some kind of magic which I can't explain] and drain the battery. The advanced circuitry utilized in the APS power supplies offer efficiency ratings of 86-90%. However, when combined with a high quality battery, APS power supplies can supply transient surges up to 1000 amps.
The IQ4 controller allows the APS power converter to operate as a 3 stage "smart charger." This gives the end user the benefit of bulk, absorption and float stage charging, increasing the charging capacity of the APS power converter and decreasing charge times insuring proper and safe battery charging and minimizing and over charging.
Likewise, an air compressor can come in equally handy for fixing a flat, blowing up an air mattress, and a whole list of other applications. I filled the battery with deionised water and tried to charge it again after leaving it to cool.
Additionally, when not in use APS series power supplies are essentially off, reducing electricity usage.
Unfortunately, both of these items are often quite bulky, making it a hassle to find the room for one of them, let alone both. This is the reason why I am so impressed with Jump-N-Carry JNCAIR jump starter and air compressor.
This nifty device is plenty light and portable enough to stow in the back corner of any shop or garage, and powerfully performs both the roles of jumping a battery and airing up anything you need it to.
The integrated, industrial grade air delivery system comes outfitted with a twelve foot air hose, screw-on chuck, and built-in pressure gauges.
Too few of them and you may struggle to give your engine enough juice to turn over, particularly if it’s a large one.

Delivering 1700 peak amps and 425 cold cranking amps, the Jump-N-Carry JNCAIR is capable of quickly jumpstarting any engine you throw at it. As far as recharging its own internal battery, all you have to do is hook the JNCAIR into an AC outlet. For this reason, it’s important to consider the construction of the unit before you purchase it.Upon inspection, it’s easy to see that the build of the JNCAIR makes the cut. The case is impact resistant, and the cables and clamps are industrial grade, not only ensuring that they won’t easily break but also helping to keep a solid, corrosion penetrating grip to produce good connectivity when connected to the battery. This compacted size ensures that the JNCAIR stores easy and is even easier to employ, making it great for bringing along on long excursions. How Much Should You Expect to Pay? The Jump-N-Carry JNCAIR 1700 amp is available on several online retailers, ranging in price from $216 to$248. Here are what a few satisfied users had to say: “I’m so impressed with the quality” “I’m amazed the internal battery is still going strong after so long” “So simple to use and holds a charge for a long time” “ I have owned two other brands that serve the same purpose, and only this one will I recommend to anyone” “Everything I expected!” “ I have used it in emergency situations on off road trips for inflating tires and jump starting vehicles” “Very good and very durable”  Any complaints?
Also, there is no way to turn off the power to the clamps once the charger is turned on. Where Can You Buy the Jump-N-Carry JNCAIR? In order to post comments, please make sure JavaScript and Cookies are enabled, and reload the page.