I have the C9000 and love it (of course it isn't a small travel charger).
But looking at this one, it appears it does not do individual cells, only 2 or 4 at a time. That would be inconvenient for devices that use 1AA as you would have to carry an extra spare cell just so you had two discharged batteries ready when it came time to recharge.
Many of the small devices people "travel" with these days are moving to USB as the preferred recharge option. (Phones, tablets, music players, etc.) I think once you specify "travel" in your requirements, USB will immediately become the dominant option.
As HKJ pointed out, a small AC to USB adaptor can easily become part of your travel kit. It probably also allows the charger to be more compact since no mains converter is required inside.
Add to that the fact that many cars now have USB as standard (and if not there are cheap lighter adaptors). Planes often have USB outlets as well. Even some solar panel "travel" units output to USB.
Don't rule out USB simply because you don't travel with a laptop.
My theory has been plugging and unplugging means the circuitry temperature went cold and hot so all that expanding and contracting would decrease its life :(
Read about this light bulb thats been ON for a 100 years in some US fire station !! call me crazy but that has made me Leave my electronics plugged in lol
do you know why its still burning?
not because it was seldom turned off, but because its being run at very low power, an incandescent will last much longer if run at lower current, but its a tradeoff, it less efficient but longer lasting, if i’m remembering correctly halving the power will quadruple the life, so your 1000 hour bulb would last 4000 hours, but you will get far less then half the light.
CFLs are different, they have electronic starters that have a finite number of cycles, i had posted a thread a while back about 6000 hour rated ones that were barely ever turned off and still going at 11000 hours because the electronic starter was nowhere near burned out.
Your LED flashlight that uses PWM goes on/off many times a second, the 105C runs at 4.5mHz or 4.5 million times a second, your CFL would be dead pretty quickly if you tried that, yet the LED should last tens of thousands of hours
So in conclusion you can’t use a lightbulb as an allegory for all electronics
Well, I’ll be darned! In all the time I’ve had this Maha I’ve never tried to charge a single cell, so I just tried and it won’t.
In my single cell flashlights I’ve always used lithium primaries just for the convenience and light weight. My main application is either for 4 cells in a camera, or 4 in my shortwave radio or handheld GPS.
no its still burning ! 110 years later .The bulb's long life has been attributed to its low power, near continuous operation, and dedicated power supply according to Wikipedia
I tend to leave CFLs on rather than turn them on/off for short periods because of this, but I wonder the cost of replacing vs. wasted electricity (they can be costly, for example the Philips bulb I use in the bedside lamp is at least 7 years old).
i also do the same, i was never able to accurately calculate the life loss per on/off cycle, i consider 3 hours of life loss as my best current educated guess
My i4 charger charges the aaa eneloops not so good like my b6 does…
If charged and discharged with b6 I get around 720mAh with my i4 I get 100mAh less…
So I am searching for a nice charger which is suitable for AAA.