It should be working then? I don't really think that a Battery Tender Junior has a charge rate (0.65 amps) that will ever keep up with the nightly rate of discharge when using it with a battery to try to make a CPAP UPS. The good news is that, with a trial of a single night, a Battery Tender Plus d...

I think your problem is not using the charger when you are using the battery. No. That is most definitely not my problem. As I clearly said, my battery has been continuously connected to a charger for the entire time I've owned it, except for a few seconds last night when I swapped chargers. When y...

Even some of the little "trickle only" chargers will kill your battery if connected full time. Trickle and float are different. That's not to say that a float charger couldn't also kill a battery, but it's very likely with a trickle charger. It's a lot simpler if you only use the battery when there...

You may need to get two chargers, one heavy duty to do the bulk of the recharging and then a good float charger to top it off and keep it there. It's starting to look as if that might be true. Of course, that would mean we can't make an effective uninterruptible power supply for CPAP this way - if ...

It turns out that a Battery Tender Junior is most definitely NOT the correct charger for my setup above. The charging amps are 0.65, so to charge a 70 amp-hour battery takes... way long, according to the algebra. This is not a theoretical problem! I have a rotten cold and stayed home from work for 2...

[quote="archangle"That means that 1 ounce of hydrogen can explode if mixed with 7/4% lbs of air, or 175 ounces of air. [/quote]

I had never even considered the possibility of solving stoichiometry problems using Imperial measurements. Isn't this part of why SI units were invented in the first place?

So, now that I typed all that up... I just read in JohnBFisher's guide that there's a Y-adapter with an SAE connector on one end and SAE and 12V socket on the other (Powerlet PAC-026) . This is obviously the way to go for me, since it'll mean I can completely avoid having a second connection on the ...

billbolton wrote:The changeover between AC mains power and battery will still be a manual process that involves unplugging and plugging some cables.

Why?

Can't the charger stay connected while the battery is supplying power to the DC converter?

You'll also want to take LOTS of paperwork to show the flight attendants so they don't freak out at your nose-hose and insist you not use it...

I just today put the following together to deal with our frequent New Hampshire power outages (prices in USD): Optima D31M Battery . This is a 70Ah AGM deep-cycle "marine" battery with both threaded and SAE car-style posts. According to the ResMed site, from a full charge it should be more than enou...

"It's times like this that I wish I'd listened to my mother."

"Why? What did she tell you?"

"I don't know! I wasn't listening!"

Another insanity: When I was working as the librarian for a (now defunct) pharmaceutical company, the IT department blocked access to the FDA website. It was about drugs, you see. For about a week, I was blocked from accessing the Drug Enforcement Administration website, so I couldn't renew my DEA ...

... I, for example, cannot install any software whatsoever on the hospital-owned computer on my desk, and the USB ports are disabled so I can't plug in a card reader. It's not kosher to use a private notebook for a patient's clinical information (if I did that then took my own notebook home, I woul...

When I write a prescription, it's none of my business where it gets filled. The only exception would be with controlled substances, in which case I ask patients to pick a pharmacy and stick with it. In most cases, a physician would have a legal obligation to give you the prescription and let you fil...

no, im not coughing it up Phlegm is coughed up. If you're not coughing it up, it's something else. If it's coming from your nose, it's nasal mucus. If it's coming from the back of your throat, it's still mucus (nasal or sinus) via postnasal drip. There's all sorts of goopy stuff that you might be r...