Upgraded Battery Case for Samsung Galaxy S21 FE 5G, 5000mAh Rechargeable Extended Battery Charging Charger Case, Add 100% Extra Juice, Not Compatible with Galaxy S21 (6.4 Inches) Black

Seems to work.

This charging case is pretty cool. My phone alone, normal only last half of my day, but with this addition I can get through a full day without having to plug into the wall at all. It also protects my phone. I've dropped it a few times with the case on and haven't scratched my phone at all. I'd definitely recommend.

I bought this case to extend my phone's battery life during a day trip out of state. I left my house around 8am and around midnight the case battery was 100% drained and my phone battery was at 93%. In that sense I cannot complain. It added a ton of life to my S21 FE.As for complaints:1. charging the phone and the case is a little iffy. seems like it works sometimes and it doesn't other times. Some mornings I wake up and the phone and case are both 100% and other mornings the case is 100% but the phone is slow charging and at 50% - 75%.2. sometimes when I turn the charger on it starts slow charging. Which is slow enough that the battery drains faster than the phone charges if I'm using it. The fix to this is pretty simple -- I just reset my phone and it charges at normal speed again. but it's a bit annoying.3. I'm not 100% sure on the 5000mah claim. I tested my phone by draining the battery to 10% and then charging off the charger which was at 100%. After the charger was fully drained the phone was only at 70%.Overall I'd say I like the case. it's fairly simple case design, not to flashy. The charging is a bit wonky at times but for the most part works without issue. You won't extend your battery life 100%, closer to 60%. You could get a separate power brick for half as much and get twice as much battery but having the case/battery combo is nice.

Good battery life ease to install Good quality at a good price

This case does NOT fit the samsung galaxy s23 fe size 6.4 it fits 6.1. Grrr

I like how easy the product is to use, very simple plug and plug style. I also love how long my battery life is extended. I'm very happy with the product provided, would recommend this case to others.

Really wished this would charge the phone and itself when plugged in, but it only charges itself, then charges your phone after it's unplugged... Making it kind of pointless. You have to take it off and plug both in to fully charge, and that's a pain.

It's sucks that it does not turn off charging even holding the button for 3 seconds as soon as I put my phone in its charging and will no turn off