External battery using AAs?

[Vipera]

I had an external battery without an internal battery. In fact, I could put 4 AA batteries and use them instead. Where can I find a good model that won't break in a week?

 

[FAST6191]

So you are in off topic without a device name, or even device type.

I guess you had what many around here would know as a mintyboost but had a cheap and nasty one. If I wanted something like this I would probably build my own (it is a battery holder, some form of voltage regulation, a socket and a switch). Not sure what people are opting for if they just want to buy something though.

 

[Vulpes Abnocto]

Does it have to be AA? What about an external battery that uses rechargeable 18650 batts?
http://www.fasttech.com/products/1280901
(link is an example, not a recommendation)

 

[Vipera]

Does it have to be AA? What about an external battery that uses rechargeable 18650 batts?
http://www.fasttech.com/products/1280901
(link is an example, not a recommendation)

Thanks. You gave me a good input on where to look for. Do you have any 18650 brand to suggest?

 

[Vulpes Abnocto]

I personally use the Panasonic NCR18650B in my vaporizer and flashlights. Nitecore also always makes solid, reputable batteries and chargers.
I have less recommendation of what to buy and more what not to buy. The people I talk to mainly say to keep away from brands with the word "fire" in the name. Surefire, Trustfire, Ultrafire. Same goes for chargers.