External battery for phone?

Question

Iron

In the fall, I was going on a short trip and it would be interesting to then look at my route by day, so I set out to search for a gps-logger .
But, I came to the conclusion that having an android smartphone with a gps module is better and cheaper to use it. Only the battery for a day will not be enough, so I started looking for an external battery that can keep the phone alive throughout the day.
After reading the article How not to charge a smartphone, I doubted various external batteries.
I have written on the battery: Rating: 3.7V–1500mAh (5.55Whr).
There are chargers with 500mA and 1000mA. As I understand it, if the android did not eat the battery, then charging with 500mAh would fully charge the battery in about 3 hours. And with active battery consumption with the included gps module, even 500mA output should be enough.
I'm considering prices up to $40. So far I've settled on the following chargers (links to dx):
10000mAh Mobile Power Battery Charger w/ Dual USB - $29.00
Dual-USB 5000mAh Rechargeable External Battery - $
24.90 6000mAh Rechargeable External Battery Pack with Ce... - $29.99
9000mAh Mobile External Battery Power Charger with... – $37.99
What would you recommend to stay? Are there any pitfalls that I'm not aware of? Can these external batteries keep a smartphone alive for 1-2-3 days?

Answer 1

I myself use such a device. Very satisfied.

Answer 2

I ordered a battery with DX, as on your third link. Lightweight, comfortable. I haven't checked the actual capacity, but it copes with its task.
The cables that they put in the kit (actually for a separate price) are not worth the money spent on them.
I can advise you to find a similar one on the same DX, with a minimum set of cables and without adapters.
By the way, this particular battery does not support the possibility of its own recharging at the same time as the power of the rechargeable devices - keep in mind.

Answer 3

I use interstep PB3000 , not the most capacious option, but enough for an honest couple of phone charges. A separate bonus micro-usb lanyard cable for charging your phone.

Answer 4

I use this battery cheero Power Plus 10400mAh DANBOARD Version Four times to charge the phone is enough. Plus it looks cool