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power up Customers Reviews

  • OK, but not for solar panel

    posted by Alexketto

    Excuse me, for my english.Good construction. No other parts needed. Fully adjustable output voltage within the specified value.
    If you would solve the use of solar panels, it would be a very nice gadget.
    Good, goog, but the Solar Power Supply?
  • Not very efficient, but versatile

    posted by amigaexpert

    * Wide output range* Mount holes* Relatively small
    Find the desired resistance, desolder the potentiometer, add fixed resistance. This will increase stability & reliability.Also take care when screwing these to any conducting surface/material.And remember to add an mechanical switch.
    If you need more current then the small USB "charger"s can supply, or if 5V isn't enough for your use, then this or any other of the LM2577 adapters will definitely do the trick.But they have limits if the lithium cell is depleted, higher output voltages and/or currents may be problematic.This one is better for 2-cell applications.
  • Good, but struggles over 70 feet

    posted by haralddo

    As always with Dealextreme, it's cheap.Easy to use and has a cable that makes it easy to fasten with tie wraps for permanent installation
    Could it help to power it with a second power cable or via a powered USB hub?
    I use this with a keyboard with buildt in mousepad. Even with high quality cable it could struggle over 20 meters. 10 meters cable, ca 33 ft is no problem.I use a lot of cat5 extenders, and this is one of my favorites!
  • power booster dc-dc 12 V in 13=34.43V out

    posted by lasermanathome

    one of the finest boosters I know, I have used several of these for different applications.It works fine as fast start-help for cars with empty batteries, in that case I have a 12V 17AH gel-lead battery , connected to this booster and make 14.4 VDC (the voltage the generator of the car itselve delivers) and within a few minutes , the car starts without troubles.Because is is very cold here these days, below minus 8 centigrades, the weak batteries have too less power to start the car, the combination of the 17AH gelbattery and this booster gives just what the weak battery needs to help it out of its "hibernation" and this combination works far better than the use of only the 12 V 17AH gelbattery, because the few Volts extra forces the carbattery to wake up and do his job.Also this booster is very uasble for 20-100W powerleds wich need 30-35VDC out of 12 VThe 100 Watt Led turns the night to day and can be supplied by the car battery.
    A very smal case made of aluminum can protect and cool the booster, correctly build in, the case has not to be connected to earth, if desired.A CC(current controll/limiter) would be fine, a fuse does not protect the booster, so a temperature shut off would also be handy.Within its parameters this booster works very good but take controll of the drawn current, when used for higher voltage and a lot of Amps, this booster works perfect untill it is killed by the produced heat
    A very nice booster wich needs some extra attention and protection, it works untill it blows up,no limiters against mans stupdities are build in as far as my experience reach.So take precautions yourselve otherwise you can buy a new one (like I did).TThis unit is -like most switched powersupplies-difficult and expensive to repair, better buy a new one and if you -like me- do a lot of experiments take some of these in stock.
  • A good converter with good parameters.

    posted by Belsysnet

    The device is good at laptop powerful loading (> 50 watts). Heating is negligible. Efficiency as declared. The minimum input voltage was lower. Device to run with 9,6 V, but with low efficiency.
    Solid capacitors, probably would have been better, and slightly increased the cost of the device.
    The unit deals with the task. With proper cooling, can work on the stated power (150 watts). I would recommend using it on a constant load up to 100 watts.


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