USB Charger Stand (Making My Own) ?
Cellulars, Kindle, Nook, Yadda. Too many gizmos to count, it seems like. And the ebooks much prefer gentle charge rates (current limiters). Then there is Mexican electricity. In a fit of optimism, I p...
Forum Discussion
OK :) I'd better recap this...
I do not care about the Samsung S4 battery. They are a snap to change.
I am not concerned with gizmo device USB battery charging or power. Not critical.
BUT BUT BUT BUT
I am concerned with expensive device non replaceable batteries.
Kindle
Nook
I intend to do all I can to increase the battery lifespan of these two devices.
Because when the batteries go bad the devices become near junk.
And because some people think getting ESTAFETA shipping across Mexico is cheap.
Try $380 pesos and then an eighty mile drive to retrieve packages. $25.00 USD plus $12.00 in gasoline, and a day wasted. Forget about the week wait I can stare at my navel.
Techs at both Nook and Kindle said battery life of their units is compromised by high USB charge rates. Are the techs stupid? Are they unaware of the unit's onboard charge management? Or are they savvy to reality?
Mr Wizard has a great recollection. Yes there are hot flashes down here that DESTROY even premium direct plug-in USB chargers. The last device was reputedly "Blow Up Proof" by testimonial after testimonial. A TWENTY FIVE DOLLAR USB charger purchased on Amazon. Two ports - one regular the second current limited for Apple devices Nook and kindle.
That and three other USB chargers have failed in the last two weeks. I'm you know, sort of disgusted...
Does the power down here get so wacky that it tampers with those IC regulators and you know like destroys them? Is an average of 26 months on an eReader battery normal before it plays possum? Keep your eye on the bouncing ball $25.00 charger. None of the failed chargers cost less than ten dollars. This is not pass the collection plate grade USB chargers.
Oooooooo what other symptoms? multiple laptop's bricks that get a hell of a lot hotter down here DELTA T than they do in the USA. We are talking 10 to 15 degrees hotter. "****! Ouch!" hot.
The laptop bricks get hot but they do not fail. Ooooooooo a clue.
No, and I mean ZERO wall wort is going to have the protection circuitry of a power brick. And no power brick has the survivability of a Meanwell power supply. We are getting closer.
The less work the eBook power management circuit has to do, the longer it will survive, right? Why shovel funnel feed a poor battery to charge in 2 hours when it has ALL NIGHT to do so? Cram-jamming only is appropriate when continued charging cost more than it's worth - like generator battery charging in an RV. And cram-jam charging an RV battery does not significantly lessen the lifespan of the RV battery.
Something is KILLING my USB chargers and Five hundred dollars worth of eReaders gives me a suggestion something is afoot. Forget about the FOUR HUNDRED dollars it cost me to go get the replacement eReaders. And months doing without...
So do I spend yet more money on another wall wort miracle gizmo? A Jim Varney moment.
I am a tired and retired electrical engineer. When I smell a skunk it means black and white fur.
CONCLUSION
There is enough greatly appreciated useful information above for me to proceed. Yes I am going to build a Meanwell powered USB charger. It's going to have two ports with 300ma limited 5.1 volt output. WITH 0.001 max vdc ripple. And latching 12 hour timers on all charging leads.
And it will not provoke a DON'T MESS WITH TEXAS grade handshake with the eReader circuitry.
Thank You
I do not care about the Samsung S4 battery. They are a snap to change.
I am not concerned with gizmo device USB battery charging or power. Not critical.
BUT BUT BUT BUT
I am concerned with expensive device non replaceable batteries.
Kindle
Nook
I intend to do all I can to increase the battery lifespan of these two devices.
Because when the batteries go bad the devices become near junk.
And because some people think getting ESTAFETA shipping across Mexico is cheap.
Try $380 pesos and then an eighty mile drive to retrieve packages. $25.00 USD plus $12.00 in gasoline, and a day wasted. Forget about the week wait I can stare at my navel.
Techs at both Nook and Kindle said battery life of their units is compromised by high USB charge rates. Are the techs stupid? Are they unaware of the unit's onboard charge management? Or are they savvy to reality?
Mr Wizard has a great recollection. Yes there are hot flashes down here that DESTROY even premium direct plug-in USB chargers. The last device was reputedly "Blow Up Proof" by testimonial after testimonial. A TWENTY FIVE DOLLAR USB charger purchased on Amazon. Two ports - one regular the second current limited for Apple devices Nook and kindle.
That and three other USB chargers have failed in the last two weeks. I'm you know, sort of disgusted...
Does the power down here get so wacky that it tampers with those IC regulators and you know like destroys them? Is an average of 26 months on an eReader battery normal before it plays possum? Keep your eye on the bouncing ball $25.00 charger. None of the failed chargers cost less than ten dollars. This is not pass the collection plate grade USB chargers.
Oooooooo what other symptoms? multiple laptop's bricks that get a hell of a lot hotter down here DELTA T than they do in the USA. We are talking 10 to 15 degrees hotter. "****! Ouch!" hot.
The laptop bricks get hot but they do not fail. Ooooooooo a clue.
No, and I mean ZERO wall wort is going to have the protection circuitry of a power brick. And no power brick has the survivability of a Meanwell power supply. We are getting closer.
The less work the eBook power management circuit has to do, the longer it will survive, right? Why shovel funnel feed a poor battery to charge in 2 hours when it has ALL NIGHT to do so? Cram-jamming only is appropriate when continued charging cost more than it's worth - like generator battery charging in an RV. And cram-jam charging an RV battery does not significantly lessen the lifespan of the RV battery.
Something is KILLING my USB chargers and Five hundred dollars worth of eReaders gives me a suggestion something is afoot. Forget about the FOUR HUNDRED dollars it cost me to go get the replacement eReaders. And months doing without...
So do I spend yet more money on another wall wort miracle gizmo? A Jim Varney moment.
I am a tired and retired electrical engineer. When I smell a skunk it means black and white fur.
CONCLUSION
There is enough greatly appreciated useful information above for me to proceed. Yes I am going to build a Meanwell powered USB charger. It's going to have two ports with 300ma limited 5.1 volt output. WITH 0.001 max vdc ripple. And latching 12 hour timers on all charging leads.
And it will not provoke a DON'T MESS WITH TEXAS grade handshake with the eReader circuitry.
Thank You
