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Mugen Power 5500mAh Extended Battery for Samsung Galaxy S4 I9500 / I9505 with Battery Door [HLI-I9500XL]
Mugen Battery will last 2.12 times as long!

Regular Price: $89.50

Special Price: $79.50

Ships on December 18, 2015.


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  • 365 Days Warranty & Free Returns
  • Quick & Secure Ordering Process

Mugen Power Extra Strong Extended Replacement battery. Express Shipping Worldwide!

Mugen Power is the worldwide leading brand of high performance batteries for portable electronic devices. Mugen Power means Performance and Quality.

Mugen Power batteries have better performance (higher capacity) and reliability (longevity & safety) than other brands. The superior performance improves run time, often doubling that provided by the original brand replacement. The superior quality results in longer battery life and better protection of the powered device.

All Mugen Power batteries also undergo vigorous QA procedure, resulting in Mugen Power achieving the lowest return rate in the industry. All Mugen Power batteries are CE approved.

Mugen Power batteries are premium product and designed for experienced users, who understand importance of quality for long battery life and safety of everyday use.

See what others say about Mugen Power Batteries:

"Go buy one, well worth it!"

"The extra size and weight increases pale into insignificance when you consider the true convenience the battery gives... it represents excellent value for money."

"a much better choice"

"This is the second Mugen Power Battery that I own and I can't think of me having a Pocket PC without a Mugen Power Battery on it. This battery gives me the freedom of mind of not having to think about to recharge the battery everyday after work."

Longer Battery Life Premium QualityStandards Compliant

Worldwide delivery: We ship to any address Worldwide

Shipping Method: We ship your order using World-class Courier Services so You get your products securely and as fast as possible.

Online Tracking: Right after your order is shipped, we send an email with online tracking information.

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We understand that the safety of your personal information is important to you. Our webshop is equpped to protect your personal data and credit card information from unauthorized access.

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Mugen Power Satisfies

Returns & Exchanges:

If you are not 100% satisfied with puchased products, you can return your order to us for a full refund or replacement.

Return Merchandise Authorization (RMA) number is required on all returns. All items returned without RMA number will not be accepted and refused.

To obtain a Return Merchandise Authorization (RMA) number, please contact us for further instructions. Returns or exchanges are made within 1 year after the purchase date. If possible, items should be returned with all parts and accessories, and in original packaging, including the manual, the inserts, the RMA number and a copy of the packing slip or invoice.

We will process exchanges or refunds within 1-2 weeks of receipt.


Customer Reviews

Overall Rating

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15 April 2015


Easy to install, works like promised. Now my phone doesn't have to be charged every 6 hours!


great battery ever / beste Batterie

5 April 2015


I have not expected this increase of power. With original battery my S4 phone needed to be recharged all 3 days, now with the power pack its more than 8 days, a whole week. Recharging need about 9 hours and the phone does not fit into the docking station anymore (as expected). Of course the phone is heavier but still good to hold with the new case.

So eine Steigerung hatte ich nicht erwartet. Mit dem originalen Batterie hat mein S4 so 3 Tage gehalten nun ist problemlos eine ganze Woche drin. Zum Aufladen benötigt das S4 nun so gut 9 Stunden und in die Dockingstation passt es mit dem Akku leider nicht mehr (war auch nicht zu erwarten). Natürlich ist das Telefon mit dem Akku und Cover etwas schwerer und dicker, aber liegt gut in der Hand


Finally my Galaxy S4 lasts a whole day without any annoying power savings :)

8 January 2015


After a week use I really like this Mugen 5500 mAh battery :) Yes, phone is about 2x thicker with this battery but corners are nicely rounded so its not so big issue - after all, I bought this battery for capacity, not thickness :) And Mugen provides enought capacity to get me throught day, when working and on free time. And I appreciate the quality that Mugen promises of their batteries. Unfortunately I'd have take one star off quality due the back cover, which I'd like to be more robust, sometimes it "bends" too easily.


Pleasantly surprised

17 October 2014


Oh my God, my phone finally lasts through a work day :). I have tried juice packs, cable at work desk, external extended batteries. Nothing is as good as this Mugen battery extender.
Even at my 15% battery notification, I still have 30mins of heavy usage.
Mind you , I play games daily and this battery lasts the mile.

only on two days usage - 7:30am-20:00pm heavy usage gaming, AWESOME highly recommend and the back case has a bit of a grip to it which holds the phone nicely in your hand.

The pouch though, another story, funny looking and gigantic :) Looks like a cheap extra on the side.



24 August 2014


Galaxy s4 works 4 days instead 1,5 with original battery!



1 August 2014


Shipping was great. I had the battery within one week of ordering. This is our 4th Murgen battery and would not hesitate to buy another. Completely charges in 3 hours and lasts for 2 to 5 days depending on phone usage.


Excellent battery

14 June 2014


My original battery was always letting me down so I decided to purchase the extended battery.

What a difference!
I charged and drained it several times to bring it to its top efficiency and it is now lasting a couple of days at least with heavy use.
I access work emails constantly, so am a heavy user.
Very pleased.


Hyvä tuote

4 May 2014


Hyvä akku Galaxy S4:een, nopea toimitus Suomeen. Kandee tilata, pystyy suosittelemaan!


Love it!

1 May 2014


First time I used a Mugen battery and I am totally happy with the product.
Not having to charge the phone every day was my main incentive to purchase this item, and I was not disappointed. Although I have not run the battery empty yet - I am certain it will easily last for two days of moderate use - possibly longer.

The only downside is that I cannot find a decent protective cover for the phone now - although the supplied pouch is okay and much appreciated, it's still a long way from having a user friendly protective casing. This however is a small price to pay for the extra power this battery supplies.

You will also need to purchase some universal mobile phone cradle if you want to use your phone in your car via a windscreen mount - the original mounts, designed for your phone, will not be suitable anymore due to the added dimensions. I didn't have any problems though finding various alternative mounts.

I dropped my phone twice, and you should be aware that due to the size and extra weight of the battery, it is more likely that on impact the cover and battery separates from the phone. So don't drop it (doh).

Unless the supplied phone stock-batteries improve in the future, I will happily purchase this product again for my next phone(s).


Mugen S4 performance

10 April 2014


Using this battery almost a year, if you follow instructions for initial recharge then this battery is much better than ZL. I wasn't afraid about running off power much after having this battery while on long business trips.

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