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Anker Astro3E 10000mAh Dual 5V 3A USB Output External Battery Pack Charger | Meritline.com
This is one of the most popular power packs for people who need to keep their smartphone or tablet running for long periods of time away from an AC jack (like playing movies on long plane flights). Price is $40 on Amazon where reviews are mostly 5 stars.

Use coupon code MLCF27TN to get the $33 price on Meritline.



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Thanks BMWLVR82
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i think i bought one of their products for an extended battery on my cellphone and it didn't last too long.

i've bought a few of their products before. they've been generally reliable from my usage. for the amount of power and price, it's a pretty good deal. do note that they've come out with a second generation of these external batteries that are more efficient. I believe their website indicates that their first generation lose about 30% of its power from the energy transfer, so for a 10000mAh, expect to charge the average smartphone around 3x on this (~7000mAh). Second generation versions are suppose to only lose 20% of its power, which is inline with newer external batteries, such as limeade batteries.

sidenote, these types of batteries are almost a requirement for people playing the ARG, Ingress

I have had this older model for more than a year and it works great. Anker batteries, car chargers and wall chargers have been excellent for me.

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