What is longevity of external portable battery packs?

[Boris_yo]

Good day guys. I was thinking of getting one of those external portable batteries but wondered if it is worth it for my needs. I would not be charging frequently but once per 2 days at least maybe twice per week as I am not that mobile.

I would like to know what is the battery longevity in such portable battery packs since I am hoping one would last me 3 years if it is possible. Since I would use it for my Nexus 4 which has 2100mAh battery, keeping in mind my modest charging needs, should I take 3000mAh or 6000mAh battery pack? If battery packs do not last 3 years then I don't see the reason buying high-capacity product.

Let me know your thoughts. Thanks!

 

[FunN4Lo]

I don't think those external bat packs have been around long enough to judge whether they last 3 years. Internal cell phone bats don't. But they are normally subject to many more charge/discharge cycles, so that might not be a good comparison

 

[coolicool]

I have a amzdeal external battery which is made with ipad battery modules inside. It is so good.

Sent from my iNew V3 using Tapatalk

 

[wcjeep]

They are rated for how many times they can be recharged.