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emergency usb charger

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emergency usb charger Customers Reviews

  • Suitable for charging when your on the go

    posted by Darkers

    You could charge it whenever you want when your walking , camping , on a trip and so on. You only require Double A batteries and its very easy to find double a batteries at shops. The cable length is reasonable and the switch is straight forward ; OFF / ON / Lights . Theres an indication red light when its charging when you switch it on
    The light might be necessary if its deem light but if its bright like most of the torch light it could be use in emergency cases which is handy !
    You should get it ! The price is amazing , you should grab them while you can ! For 5 bucks only
  • USB Dynamo

    posted by tatraprodej

    it's a good thing. allows you to charge any appliance that has a USB, if you run out of battery. has a red LED, which lights up when rotating.
    I recommend everyone who walks in the mountains, etc. It's small, so you can carry with you always, if there batteries.
  • Perfect fit for your bag for emergency usage

    posted by iranzop

    Small, uses 2 batteries which could be the usb-powered ones so... it's compact. and easy to carry and operate.Has a light which can be used as a lantern
  • Excellent product for that price

    posted by theseven

    - Cheap- 2A output- PCB contains battery protection circuitry (deep discharge, overcharge, short circuit)- Bypass diode from input to output- Step-Up converter efficiency of 70-80%- Trickle charges deep discharged batteries- Doesn't start charging if battery voltage is above ~4.15V- Fuel gauge isn't all the way off (but tends to be a bit too optimistic)
    Some data points:- PCB looks like the 2A output version, bottom picture here: http://i1138.photobucket.com/albums/n525/yulunyan/55.jpg- Battery charge completion: 4.20V- Powered off battery discharge current: 0.5mA- Powered on (idle) battery discharge current: 4.6mA (including LED)- USB output voltage (idle): 5.21V- USB output voltage (3.55V battery, 1.63A load): 4.57V (efficiency at this point: ~72%)- USB output voltage (4.1V battery, 1.75A load): 5.16V- USB output voltage (4.1V battery, 1.95A load): 4.61V
    Awesome product for that price, apparently well-engineered electronics.I'm really curious what that jumper on the PCB is good for.

    posted by nike123

    POWER UP EVERY FAN,A PHONE OR JUST A DX GADGET :DIt's a simple device that can charge any USB device
    :+ It powers your gadgets and charges low power devices
    + Small and easy to carry it inside your bag
    - The tab covering the wires fell off the first time I open the battery cover, but it is not a big issue as it can be glued back


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