Nyko - Steam Deck Power Bank – 10000mAh Capacity Backup Battery Pack w/ 37w USB C Charger – PD 3.0 Fast Steam Deck Battery Bank – Play & Charge Portable High Capacity Power Bank for 1.25+ Hours

I should have listened to other reviews, the device doesn't even last an hour under regular use and just after 2 weeks and about 3-4 charge cycles the device has completely stopped working. Spend the extra cash and get a better powerbank thats more reliable.

This Item fits perfectly on the (Steam Deck)! The only issue is that it does not charge the (Steam Deck), and battery at the same time. I believe this should be fixed.

I bought this at a reasonable price so I can play my steam deck for a longer period of time. However, because I have a case it’s hard to clip it on. I had to use a Dremel tool and cut off those round posts that are around the screws for it to fit perfectly fine on the case. Other than that it now works just fine with no problem at all!

Stopped working a little after a month. Don't buy.

Is supposed to be good for an average of an hour. Did not even last a half an hour pretty disappointing. Had I known it would perform this poorly I would not have purchased it.

Originally had a good review on this but changed it due to the battery no longer charging after probably 6 or so uses and owning it for about 2 months. It's sad how bad this is for $50. Also just had to submit a second support ticket to Nyko since they ignored my first one.

Product is nice but it doesn’t power long enough when playing maybe 30-40 mins the most

Comfortably doubles the battery life of my steam deck, I can now easily play AAA games for 4+ hours. Downsides is a large battery like this easily doubles the weight of the deck which is unavoidable but made much worse by how top-heavy the deck feels with the battery attached, makes it significantly less comfortable to hold and keeps it from working with any stands or docks.