Galaxy S9 Battery Case

Rated 4.73 out of 5 based on 11 customer ratings
(11 customer reviews)


★【STAY CHARGED ANYWHERE】: World’s 1st and ONLY battery case compatible with Qualcomm Quick charge 3.0, with a long last 4500mAh Li-Polymer battery (>800 Life Cycle). Built into perfection with all features you need.

★【FULL 360° PROTECTION】: Designed with perfectly raised bezel, ergonomic anti-slip pattern, cushioned frame and rugged outer-shell. Provides superior protection against drops, hard falls and scratches. Plus premium patterned surface with anti-slip and fingerprint proof features.

★【PRIORITY PASS-THROUGH CHARGING + OTG DATA TRANSFER】: Your phone will receive full-charge 1st and then begin to automatically re-charge the case in less than 2 hours. Plug-and-Play technology allows easy data-synchronization without having to remove the case.

★【DYNAMIC POWER MANAGEMENT】: Protect phone's battery life by optimize the charging speed when battery is empty or close to full. Sophisticated protective logic+ temperature sensor, prevents your device from over-heating / over-charging. 4 LED lights indicate an accurate power level.

★【LIFETIME WARRANTY】: Money Back Guarantee and Extended 2 Years Warranty. Upgrade to Lifetime Warranty by following @CASESSARY on Facebook, Twitter and Instagram.

Out of stock

SKU: BTC005S9BK Categories: ,

The CASESSARY Galaxy S9 battery case provides you QC 3.0 fast charging and full protection. Made with ergonomic anti-slip and durable design to protect against drops, bumps, scrapes, scratches and hard falls. 

1. Build-in high-capacity lithium-polymer battery, double the standby time for your Galaxy S9.
2. Premium material to protect your phone, charging and protecting 2 in 1.
3. USB OTG data support, enjoy fast data transfer without removing the battery case.
4. Integrated safety features with temperature control, effectively avoid short circuit or overcharge even under extreme conditions.

★ Please use original charger or compatible QC 2.0/3.0 charger to ensure quick recharging speed.
★ Do not expose this battery case to moisture or liquid.
★ Do not place battery case to fire / excessively hot environment.
★ The surface of this battery case may gradually become warm when charging.
If there’s any problem when using our devices, please kindly contact us with the contact info enclosed on the service card, we are always here to help.

• Compatibility: Only for Samsung Galaxy S9 5.8 inch ( Not compatible with Galaxy S9 Plus )
• Battery Capacity: 4500mAh
• Battery Type: Li-polymer
• Input: DC 9V-1.67A, 15W
• Output: DC 9V-1.4A, 12.6W
• Material: PC+ABS

Package Contents: 
• 1x 4500mAh Galaxy S9 Battery Case
• 1x User Manual

11 reviews for Galaxy S9 Battery Case

  1. Rated 5 out of 5

    Emanuel Gray

    This was a gift for my son. He is extremely happy with it. It really does charge your phone so you really do have two batteries worth of power for your phone.

  2. Rated 5 out of 5

    Ray Teahan

    This is a life-saving gear! I used cellphones for video-taking for games which generally takes over 90 minutes. With this extra battery, I know all the exciting moments would be recorded. It is definitely much better than using a separate power bank.

  3. Rated 5 out of 5

    Terrell Tiechman

    This is by far my favorite purchase of all time. This case is made with so much quality and style. And it doesn’t break your pockets as far as cost. It’s very sleek, I’m absolutely stunned as I didn’t expect it to be this amazing. I love this company and will only buy cases from them from now on. I’m a fan for life now. Thank you so much!!!

  4. Rated 5 out of 5

    Cesar Esquivel

    Loved it! Easy fit and installation!!

  5. Rated 5 out of 5

    Kelly Wong

    The item works great for me and it can charge very fast. It is a great case for the S9.

  6. Rated 5 out of 5

    Barry Hixson

    Loved it! Amazing!

  7. Rated 5 out of 5

    Derrek Jones

    Ok well I have used about 7 different types over the last few years and this is one of my favorites so far. The case is as big as most are but I would like to have a larger batter would be one of my complaints. The second issue is I can not stand the batter light life. It is really not a deal breaker but its annoying to me, likely no one else. I just prefer bar style to easily know where its at. Plus they are more accurate. Otherwise i like the all around protection style rather then some I used only does part of the phone. I think it is little over priced but compared to name brands its cheaper and just as nice.

  8. Rated 5 out of 5

    Alex Straughan

    Great product, as advertised. I haven’t used it for an extended period of time but the Europe trip will be a great proving ground!

  9. Rated 5 out of 5

    Ryan Detwiler

    This case is much less bulky than previous cases I’ve used. Of course it’s not a super slim fit, but it is only wide where the battery would be. It offers good protection for the body of the phone and the camera.

  10. Rated 4 out of 5

    Kenny Cervantes

    A little thick for the phone. It’s not as slim as portrayed, or at least as slim as I thought it’d be. I still like it for it’s intended purpose as a hard case that protects the phone and charges it.

  11. Rated 3 out of 5

    Ariel Phillips

    It does provide long-lasting battery recharge but it’s ridiculously big and thick. Makes your phone 3 times as thick.

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