I have a similar portable charger before but of a smaller capacity and works well. This one is also a good product since it has more amperage and will be useable longer. My only issue is it does not come with an adapter for recharging later. I have to use my other USB adapter to recharge it unlike my previous one that it comes with an integrated flip-up wall plug.
Verified purchase: Yes | Condition: New
Before I purchased this 20,000 mAh charger, I had a 6,000 mAh Tzumi charger. I was happy with that charger, but someone stole it. I thought if I bought a 20,000 mAh Tzumi charger, it might charge my phone faster, or have some other useful advantage over the 6,000 mAh charger. The 20,000 mAh charger does not charge my phone faster than the 6,000 mAh. The 20,000 one is larger and does not readily fit in a pocket like the 6,000 did. The 20,000 is not at all easily portable. It does seem to hold a charge longer than the 6,000, but that is immaterial to me. I could easily re-charge the 6,000 when I was at home at night. The 6,000 charge lasted about 2 days of regularly recharging my phone anyway. Also, the 6,000 had socket prongs, and I could easily plug it into a socket. The 20,000 has no prongs, but requires me to use a charging cord. I cannot use that charging cord to re-charge my phone while it is in use re-charging the 20,000 charger. I am generally unhappy with the 20,000 mAh charger. It is clunky and has no discernible advantages. I plan to sell it and buy another 6,000 mAh charger.Read full review
Verified purchase: Yes | Condition: New
Works great. Strong construction shell. My only complaint is that it takes so long to charge. But on the other hand it takes a long time to go dead also. I can charge my smartphone 5+ times on 1 full charge. Not due of the exact amount because i haven't ran it completely dead yet. Super impressed. Would buy another
Verified purchase: Yes | Condition: New
I got this mostly for the Nintendo switch and it charges it well. It is also the best portable battery pack I currently have. There is an issue where it won't charge past 25% unless I unplug it and plug it back in when charging the pack but that's a small detail. It works great, looks great and smells great!
Verified purchase: Yes | Condition: New
I love this product. I was introduced on a trip to New York City where it was used throughout the trip and was able to charge 4 phones throughout the day as needed. I purchased my own for a trip to Costa Rica and LOVED it. It was nice as we were out on excursions to be able to recharge since my phone was my camera for the trip. Great product!
Verified purchase: Yes | Condition: New
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