Samsung Galaxy S3 Extended Life Battery (4500mAh)

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Drastically improve the battery life on your Galaxy S3 with our Extended Life Battery for the Samsung Galaxy S3. Our extended battery is twice the capacity of a traditional battery. This means you can expect up to 24 hours of battery life, sometimes, even more, depending on individual usage. This is a bigger Galaxy S3 battery but features a slim design that only adds a minimal amount of bulk to the device. 


IMPORTANT: Even when the phone says the battery is at 100% keep it on the charger all night. If you do not, the phone will show that it is draining quickly.

  • Made from high-quality Lithium-Ion cells
  • Compatible with the Samsung Galaxy S3 from all major US carriers
  • The is a high capacity Galaxy S3 battery and requires a "calibration" period. Follow our S3 Extended Battery Calibration Guide to get the best performance and most accurate battery percentage readings out of your Galaxy S3 Extended Life Battery.

x1 4500 mAh Samsung Galaxy S3 Extended Life Battery
x1 Replacement cover available in Blue, White, Black, or Red

How long should I charge my Galaxy S3 battery?

Depending on the size of your battery we recommend 9 to 10 hours of constant charging. If your battery is 4500mah or higher, you would want to charge your battery for at least 10 hours.

Why is my Galaxy S3 Extended Battery not fully charged?

There could be many reasons your battery is not fully charging. The most common are not allowing the battery the full length needed to charge fully. Batteries 4500mah or higher would need to charge for 10Hr. If you can not fully charge your battery after 10+ hours, please contact us via email at

My Galaxy S3 battery has a bulge in the middle. What does this mean?

Stop using it. Your battery has reached its end-of-life. If you’ve only had it for several months, it could be due to improper charging. If you are still within the 180 day warranty period, please contact

My Galaxy S3 backplate (back cover) cracked. How do I get a replacement?

If your battery is still fully functional but the cover has cracked, please purchase a replacement cover. If you just received your battery and the cover arrived broken or cracked within a few days of use, please contact

Samsung Galaxy S3 Extended Life Battery (4500mAh) has a rating of 4.7 stars based on 420 reviews.