• With 2pcs of AA or AAA battery, it could be your emergency charger immediately.Could charge your android phone/Tablet PC/MP3/MP4/PSP/GPS anytime.
  • Built-in DC-DC quick charging boosted circuit,use two pieces battery can boosted to 5V,transfer efficiency can reach to more than 98%,Use new AA battery can charge the android phone(2500MAH battery) to 40% within 30 minutes.
  • Built in protection circuit,When the AA battery used or the device charged full,it will stop charge by itself.
  • Julyfox Keychain size emergency battery charger is only 0.67×0.67×2 inch and 0.4oz, compact and convenience.
  • Comes with 1pc of Julyfox Keychain emergency charger and 1 year worry-free warranty.

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Product Description

Julyfox Portable Keychain 0.4oz Emergency Battery Charger Fast Charger For Android Smartphone Tablet PC MP3 MP4 PSP GPS(Red)

Technical Parameters:
Input Voltage: 1.5-3V
Output Voltage: 5V
Output Current: 500MAH-1500MAH
Use 2pcs AA or AAA battery,Or rechargeable battery.
Product Size:0.67×0.67×2 inch(50mm*17mm*17mm)
Packing size:5.5x3x0.8 inch(140*75*20mm)
Output USB: micro usb

How to choose the best portable charger

  • Physical Size : Portable chargers come in all shapes, sizes and weight. Physical size and battery capacity go hand in hand. If you are looking for an ultra portable charger, you will have to sacrifice the battery size.
  • Battery Capacity : You will want to determine how much power you need and how often you will want to charge your power bank. If you are just looking for a power bank to keep your bag in an emergency, a power bank with less than 5,000 mAh will suffice. If you want to use your power bank several times before recharging it, point to one with more than 10.00 mAh.
  • USB ports : The more ports the power bank has, the more devices you can charge. Many chargers come with 2 ports: 1A port and 2.1A port.
  • Charging Output : Most portable chargers will come with either 1A or 2.1A output port or both. These numbers indicate the maximum charge rate in amps. Therefore, the higher the amperage, the faster the device charges, assuming it is compatible. A 1A output port is suitable for most smartphones, while old phones (such as feature phones and mobile phones) require a 0.5A port. Tablets, iPads require a 2.1A outport for great charging. Power banks capable of carrying portable computers are likely to come with a 3A port.
  • Case and material : If you plan to use your outdoor outdoor battery, you want to choose one made of durable materials like aluminum or silicone.

Tips to increase the battery life of your Android

Recapping the measures to be taken or avoided to optimize the duration of your battery:

  • Charge your battery for shorter periods and more times;
  • Charge it in a cool place; never use your cell phone while charging;
  • Do not leave the smartphone on the bed;
  • Do not leave the battery exhausted and do not store it uncharged;
  • Disconnect charger when charging is complete;
  • Do not attempt to re-connect the phone if it is turned off due to the low battery.
  • Store your battery properly if it is out of use.

Lastly, remember that after 2 or 3 years, maybe before, the battery should be changed so that the usage time can be again satisfactory.