4200mAh Rechargeable Portable Emergency Power with White LED Light & Phone Adapters

Pros: - Capacity of 4800 mAh shown instead of 4200 - Small and lightweight with large capacity - Very bright LED, really can be used as lighter in dark places - Different connectors included to charge different devices. Especially like micro-USB for Nokia phones

Cons: The size of this device suggests it includes 2 18650-like accumulators. But device cannot be easily disassembled if needed replace them. Looks like it will work not more than 2 years (like other Li-Ion batteries). Therefore price is definitely too high. Each 2400 mAh 18650 battery costs about $5 (for example SKU.1213). Reasonable price of this item has to be not more than $20.

Other: I'd recommend this item if needed charge phones in travel. And this is good as lighter. But price is too high.

Pros: - Good build quality: sturdy and nice finishing
- Very nice led, strong and has power for hours of bright light
- Charge indicator
- Can be charged via USB or mains, with the usb charger
- Good adaptors
- Compact size and nice energy capacity

Cons: - The remaining energy indicator is not very accurate
- Take a long time to charge
- Supplied usb charger is slow, I thing around 300-400mA

Other: Fair price for a good product. I take it everywhere and it keeps working perfectly. Fast charging of cell phones.

Pros: The charger performs full fast charging of phones and other USB devices exceptionally well.
The form factor and weight make it quite portable as well as portable.
A variety of cable adapters are provided in the kit so you can connect it to most phones without too much trouble.
Holds quite a lot of charge, and doesn't really discharge when left unused.
Light is bright and works well as a torch.

Cons: It appears that when the device gets warm the output of the charger decreases and it doesn't provide as much charge out of the battery.
The battery indicator is deceptive, because it often hovers about the 3rd mark, it really just tells you if it's about to die or not.
It lost a point for use-ability because the slider, it's not easy to centre it in the IN position to turn it off because the switch indents aren't very well defined.
More attention could have been placed into finishing the outer shell, it has a slightly blemished gloss appearance that doesn't appear in the photo sample, making it feel second hand.
The micro USB plug cable broke after a few uses, it's a bit brittle. Also the charger isn't short circuit proof, it will die (repairable for those inclined) if the output is shorted.

Other: You get what you pay for but overall it's worth having it.
If you're a micro-usb user then you'll want to pre-emptively hot glue the inside of the micro-usb plug or wrap it in tape to prevent the charger from dying.