Develop Bugs

Seidio 3500mah Extended Battery (w/ Pics)

I received my 3500mah on Friday with case. I haven't done any formal testing, but its been off the charger since last night on a fresh, untreated ROM and after a full day of work (including 35 minutes of Pandora on my commuter) its at 73%.
Now, some blown out pics:
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Pros:
There is no debating this; the camera lens is now OFF of flat surfaces!
With the changed dimensions of the phone, I find it easier to hold.
If you like a more pronounced presence in your pants, this phone will help provide it
You know when you have left your phone behind. This is great if you are a /b/tard that can't remember anything.
Holy crap the battery life!
Battery does not get hot. I haven't felt a temp change at all at 1190Mhz.
The balance of the phone has been maintained.
Slip-free material on the rear cover feels better and is more tactile.
The rear cover snaps in tighter than the OEM.
Cons:
Its heavier. Not as much as you would think, but it definitely adds weight. Not necessarily always a bad thing.
Its fatter. The overall size reminds me more of a PDA than a phone now.
The material used on the rear cover is impervious to all sticky material. I ordered two covers, the other one has been ground down trying to fit an M2 disc on the back and nothing is working. I've tried 3M tape, 3M windshield tape, Super Glue, and JBWeld. Its futile.
There is always the off chance that a battery goes off in my hand like a grenade, killing me, my puppy, two cats, two chinchillas, and possibly my wife in one hellacious blaze of glory. Hopefully Bon Jovi will be playing at the time.
Conclusion:
[4.5/5] I ordered an extended battery that was twice the size of my regular battery with a rear cover replacement and got exactly what I expected. Its not for everyone; But if you want your phone to feel more substantial and have a battery that has a half-life apparently on par with the radioactive isotopes at Chernobyl, this might be the battery for you.
More to come as I play with it! Post your thoughts and experiences.

More (resized this time) pics, showing the pronounced camera protection.

I agree, I've had mine now for approx 2 weeks and could never go back. I've been running Hero's Baked Snacks Roms and can easily get 2 days with moderate use if needed (I charge every night however). I'm usually around 55% - 60% (approx) after a full day.
It's definitely fatter but the phone is large anyway. The only drawback for me is that i cant fit any case on it which kinda sucks..
VSack said:
More (resized this time) pics, showing the pronounced camera protection.
Click to expand...
Click to collapse

Nice... mine should be here soon... totally stoked knowing I'll be able to really use and abuse all of the capabilities of the EVO.

hpycpl2 said:
It's definitely fatter but the phone is large anyway. The only drawback for me is that i cant fit any case on it which kinda sucks..
.
Click to expand...
Click to collapse
Agreed. I wanted to show the recessed lens because the back cover kind of acts like a case. But I would like to skin it a little more.
I need to find a way to stick the Soundgate disc on the back. This is driving me insane.

I should be getting mine tomorrow. Can't wait.
Sent from my PC36100 using XDA App

I got mine in the mail today. When my girlfriend called to ask me what I was doing this morning, I responded, "waiting on my new battery, of course. " I was able to charge it before I left for work this evening. I had to restart 3x before I reached a full charge. I will be happy when its properly calibrated. Four hours later I am at 89%. I love it.

SharkUW said:
I should be getting mine tomorrow. Can't wait.
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
I wish they'd make this with a Rugged Case that fits it...the Rugged is bulky enough, I think they'd get a good amount of sales for that.

Where is the cheapest place to buy this? Has anyone compared it to the cheap eBay knockoffs?
Sent from my PC36100 using XDA App

Im thinking about buying this:
http://www.seidioonline.com/product-p/csr5hev4x-bk.htm
but before I do, has anyone bought one ? thoughts ?

why spend 69.95 for the 3500 that already comes with extended battery cover, then spend another 29.95 for another cover?

It is a great battery. Been using mine now for a few weeks and have gotten so used to it I don't even notice the bulge anymore. I does make it easier to hold.
Most days now I end up with about 70% battery left. Having the battery power there to do what you want to is nice.

mine will arrive Thursday, looking forward to it

Anybody have any experience with the "Innocell 1750mAh Slim Extended Life Battery" ? I want to buy this. I'd rather not have a big bulge on the back of my phone lol

longhorntx09 said:
Anybody have any experience with the "Innocell 1750mAh Slim Extended Life Battery" ? I want to buy this. I'd rather not have a big bulge on the back of my phone lol
Click to expand...
Click to collapse
Probably in the thread about the 1750mah Slim Extended Life Battery?

First night with my new battery, and Seidio did not disappoint. Just like with my G1 and extended battery, I was able to go 12 hours of very heavy use. Internet/Games/Phone/Text/ and I watched Avatar in HD using my V-Moda Remix headphones, and streamed about 3 hours of Pandora. After all that I was still at 35% before I gave up and went to bed.
There is no doubt that with moderate to heavy usage this phone will last two days and with light usage a week.

Ok I'm gonna put my flame suit on for this one but I purchased the ebay battery rated at 3000 mah and I think the rear cover looks much better than the seidio one. I get approximately 2 days of use on it while running the baked snacks rom and I only payed $ 10 shipped. The battery never gets hot and the battery life is amazing. I will post up pictures if you guys want but to me the seidio is very expensive and looks really ugly. It's just a bulge out of no where while the ebay one has a smoother transition.

loztboy said:
Ok I'm gonna put my flame suit on for this one but I purchased the ebay battery rated at 3000 mah and I think the rear cover looks much better than the seidio one. I get approximately 2 days of use on it while running the baked snacks rom and I only payed $ 10 shipped. The battery never gets hot and the battery life is amazing. I will post up pictures if you guys want but to me the seidio is very expensive and looks really ugly. It's just a bulge out of no where while the ebay one has a smoother transition.
Click to expand...
Click to collapse
No flaming here
I've been burned in the past by no-name gray market batteries and I sleep a little easier at night knowing I can hunt down the maker of this battery should it do the whole Holy Hand Grenade thing on me.
Seidio is much more likely to hold their quality control to a higher standard since they back the product with their name, whereas a no-name can sell you a 3000mAh battery that is really only a 1650 and they don't have to watch their name dragged through the mud.
Its really a personal preference, and its a very good thing that we both have the choice to put our money where we want.

VSack said:
Probably in the thread about the 1750mah Slim Extended Life Battery?
Click to expand...
Click to collapse
youre the man bro

VSack said:
...should it do the whole Holy Hand Grenade thing...
Click to expand...
Click to collapse
Haha... Funny yet true Mr. Sack.
Looking forward to getting a reputable uber battery, even if it means turning my back on the EVO to get hit by the ugly stick a few times.

TPU Bumper mod for EVO with Extended Battery

I'm sure you guys have seen those hybrid TPU+PC cases that have TPU around the sides and the hard poly carb shell on the back. Well with a little force you can separate the 2 and your left with just a TPU bumper. Now at least the sides and front are protected. Sure the back can still scratch, but these extended battery doors are pretty cheap. Took all of a minute to do
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Wow never thought about that.
Does the the phone feel secure in it though, like does it feel like it want to fall out of the back?

Wow, that's a great find. I'd like to know how well it stays on the phone as well. I might look into grabbing one as well.

I did something similiar about a month ago. I simply took a black silicone case and took a exacto razor knife to the back of it. Just take a pencil and draw out the part that the extended battery pushes against the back, then cut that part out. I started with a small area, and made it slightly larger as needed and test fit after every cut until I was satisfied. Doing it the way I did, gives you a little more protection then just the edges, though the center of the battery cover is still exposed obviously. I havent taken any pics of it, but I will and then post them up.

stanglifemike said:
I did something similiar about a month ago. I simply took a black silicone case and took a exacto razor knife to the back of it. Just take a pencil and draw out the part that the extended battery pushes against the back, then cut that part out. I started with a small area, and made it slightly larger as needed and test fit after every cut until I was satisfied. Doing it the way I did, gives you a little more protection then just the edges, though the center of the battery cover is still exposed obviously. I havent taken any pics of it, but I will and then post them up.
Click to expand...
Click to collapse
That can't help but look a little ghetto.
Mitchell's EVO

Wow! awesome idea, i too wonder the same though. Now that the case is backless, does the phone fall thru the back? i'm using the sprint 2600mah battery, & my battery door is molded different than yours, will this mod hold true, & prevent the phone from falling out? thanks in advance

mitchellvii said:
That can't help but look a little ghetto.
Mitchell's EVO
Click to expand...
Click to collapse
With the Seidio back cover I trimmed mine till it was a snug fit on the hump seidio puts on their covers , Most looking at my phone think its a complete case at first glance . Of course if you stand there staring at it then yeah you are going to see its a modified case . But then if you did that I might be asking you " UM why are you staring at my phone so much " ROFL

DOG666 said:
Wow! awesome idea, i too wonder the same though. Now that the case is backless, does the phone fall thru the back? i'm using the sprint 2600mah battery, & my battery door is molded different than yours, will this mod hold true, & prevent the phone from falling out? thanks in advance
Click to expand...
Click to collapse
From what I have seen of the Sprint extended battery the door has a slight curve in the back that slopes upwards to the highest part of the battery door . You should be able to get away with a smaller cut out , meaning less material removed from the case it self there for keeping most of its strength intact . For you I would start with a small rectangular cut on the back and slowly cut more away till it fits right and snug . I personally used a TPU case its a harder material but more rigid then typical silicone . If done write I dont think it would look that bad . I seriously believe someone needs to come up with a "REAL" case for these phones and I dont mean that snap on Seidio crap either . Granted I like their products but a snap on case ? Really ? Hell even a case styled similar to the Motorola Droid X case by them with a back molded to hold the extended battery would have been fine enough to get full coverage .

I just found out thru ebay today that my tpu hybrid case shipped, so once in my possesion i'll try the mod & upload pics for you guys. The only thing that gets me though is that since i have the sprint 2600mah battery, my battery door is molded/shaped different, so should i just remove the backing like OneStepAhead did, or dremel out the backing so just the hump protrudes. I'm kinda' favoring the dremel mod cuz' at least i'll have a lil' more support for my phone, what do you guys think?

SouthernEvo said:
From what I have seen of the Sprint extended battery the door has a slight curve in the back that slopes upwards to the highest part of the battery door . You should be able to get away with a smaller cut out , meaning less material removed from the case it self there for keeping most of its strength intact . For you I would start with a small rectangular cut on the back and slowly cut more away till it fits right and snug . I personally used a TPU case its a harder material but more rigid then typical silicone . If done write I dont think it would look that bad . I seriously believe someone needs to come up with a "REAL" case for these phones and I dont mean that snap on Seidio crap either . Granted I like their products but a snap on case ? Really ? Hell even a case styled similar to the Motorola Droid X case by them with a back molded to hold the extended battery would have been fine enough to get full coverage .
Click to expand...
Click to collapse
Thanks for the suggestion, i was thinking about the all tpu case too, but i'm kinda' iffy on it. My only worries about those are that over time do they lose shape, & get stretched out? also, unlike the all silicone ones, are they lint traps? I had to get rid of my seidio case cuz' it collected lint/dust like crazy. Either way i'm excited about my lil' project, i have a tpu/polycarbonate hybrid, & a snap on plastic/rubberized case on order, time to bust out the dremel

If you can't find case for your extended battery case you can always just drill a couple tiny holes in the battery back and use a wrist lariat to keep from dropping it.

just bought a hybrid tpu case from ebay for 8 bucks to rip half of it out

edisepic said:
just bought a hybrid tpu case from ebay for 8 bucks to rip half of it out
Click to expand...
Click to collapse
Did you just order it, or did you already receive it? also which extended battery/door do you have? I have yet to receive mine, if you're using the sprint 2600mah battery please post your results, i'm really anxious to get mine & mod it.

Quick update guys, i received my rubberized/ snap on case today, & in the process of modding it, the side snapped
I'm now waiting for my tpu/ polycarbonate hybrid case to arrive, should be this week. Hopefully all goes well with this one, gonna' have to approach this one different. If it's a success, i'll let you guys know, & post pics.

I gotta just wonder, since the community is pretty much screaming for an EVO bumper case or one that fits the extended Chinese battery, why no one in China makes such a thing.

or you can use the griffin technology case and do the same thing.

mitchellvii said:
That can't help but look a little ghetto.
Mitchell's EVO
Click to expand...
Click to collapse
maybe not if the cuts were precise enough

Any updates to this? I just bought an extended battery & dont want to do without a TPU. I dont mind if the back door gets scratched.

i tried it, but it wasnt snug enough for my taste.

2 rubber bands with phanton carbon skinz
carbon phantom skinz
http://phantomskinz.com/htcevo4gchromaticswithextendedbatterycover.aspx
two rubberband that is 3.5 inch in length and .5 inch wide. You should be able to find it in your local staples store. I couldn't find a black one.

So you want an extended battery and only have $10 to spend ;-)

You can start with THIS then order THIS
Heheh, technically I don't have that exact silicone case, but I'm sure most will work the same.
I can't tell you how the battery behaves as I haven't cleared the battery stats and only started using it today, but I am struggling to get it down from 70% to 0 if that means anything (screen at 100%, everything turned on, playing games and flash, etc)
i9000 batteries don't fit the i897 so you have to peel off the label then cut a small piece of plastic off the end as you can see in the close-up. It only took me 10 minutes with a kitchen knife but it fits, it's secure, it lasts longer than stock, and it's $10 including the case then you can turn around and sell the cover to your buddy with an i9000 for $5
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Good job! I was wondering if that would work. Does the case hold the battery securely? On the flip side, is the case overly stressed?

Excellent idea!
One thing I am worried though, is Captivate battery cover that also acts as ground?? gps antenna?? Phone has two contacts on both sides of the cover...
I am not sure what all the unintended consequences would be if you run the phone without the cover for extended periods

The slider locks the battery in place so that isn't an issue. As for the case, mine is a little thicker than most of the other silicone cases I've seen. I'm doing the same thing with my x10 but because the cover is a thinner material, it fits even better on that phone.
As for the ground, I was under the impression that it was only there to amplify wifi signal. And wifi is working fine for me without it.

I thought about doing something like that if I could find a cheap replacement battery door. Cut a square hole where the larger battery fits, epoxy the battery around the door, sand and paint. It would be slimmer but might look ugly and wouldn't fit the dock anymore. The silicone case would at least make it less noticable.

Functional: Yes
Ugly: Yes
It's just a question of priorities, I suppose.
I'd rather keep a spare battery in my backpack.

I actually don't care too much for silicone covers, I'd much rather use a tpu cover. Problem with those is that they don't stretch enough to accommodate these batteries. It fits, but looks awkward.
I wonder if I took a heat gun to it, if it would stretch. I might order another one just to test that since they only cost about $4 on ebay.
joeybear23 said:
Functional: Yes
Ugly: Yes
It's just a question of priorities, I suppose.
I'd rather keep a spare battery in my backpack.
Click to expand...
Click to collapse
Yeah, no **** it's ugly...but due to the placement of the battery at the half-way point of the phone, any extended battery cover will make it ugly.
I have 2 spares but there're occasions when I don't want to have to swap batteries.
Sent from my arse

ProBoner said:
...Yeah, no **** it's ugly...but due to the placement of the battery at the half-way point of the phone, any extended battery cover will make it ugly.
I have 2 spares but there're occasions when I don't want to have to swap batteries.
...
Click to expand...
Click to collapse
Like I said, it's a matter of priorities.
If battery life is your main concern, go for it.
In my typical day I still have 60-70% left when I go to bed anyway, and I have a spare battery and charger for my travel days.

I only need an extended battery when I plan on streaming a soccer game or UFC or something. Even while connected to a charger, I can barely stream a UFC event unless I have the brightness turned right down. (and I use up >700mb )
Having used up one full charge, I'm pleasantly surprised with the performance (which included over 4hours screen on time and 11hours since plugged in).
This is probably a 2300-2500mah which I'm happy with for the price. I was expecting 2 900-1000mah batteries tied together, so this wasn't bad!

Good idea i'm gonna look into trying it out

The cover they send doesn't look like it would work on our i897 phones. Did it fit on yours ? I really don't want to just try and hold the battery in place with just a silicon cover.

Spidious said:
The cover they send doesn't look like it would work on our i897 phones. Did it fit on yours ? I really don't want to just try and hold the battery in place with just a silicon cover.
Click to expand...
Click to collapse
You have to understand that because of the design, I had to cut a bit of the plastic around the battery cells. As long as you cut it correctly, the battery is locked in when you close the sliding tab. I can take the silicone off and shake the phone with no fear of the battery falling out.
I added a new pic to the first post to give a better idea how the plastic was cut.
On my x10 only the silicone holds the battery in place and even then I never had a problem.
Sent from my arse

your pic still isnt the best. try editing with paint and add some arrows. and describe more than, "you cut part of the plastic on the battery".....

Oh an important thing about your mod, the metal backplate (that you dont have) is part of the wifi/gps antenna. thats what the 2 gold contacts on the back of the phone are that touch the back plate.

Whoever orders the battery will be able to see what needs to be cut unless they are complete idiots (in which case they shouldn't be playing with knives in the first place). Look at the first picture and remember that battery was originally square. I didn't intend on making a tutorial out of this, I'm just trying to help some people out (people who prefer function over beauty of course )
Trusselo said:
Oh an important thing about your mod, the metal backplate (that you dont have) is part of the wifi/gps antenna. thats what the 2 gold contacts on the back of the phone are that touch the back plate.
Click to expand...
Click to collapse
I was concerned about that since people have mentioned that on several occasions. WiFi works fine without it, and on my way home, my GPS worked quite well without it also (didn't really notice any degradation compared to GPS with the backplate on).
Now that I've done some testing, I'll be reverting back to standard battery for general usage. This one will be used for when I need to use GPS for long trips or stream over an hour of flash content

Trusselo said:
Oh an important thing about your mod, the metal backplate (that you dont have) is part of the wifi/gps antenna. thats what the 2 gold contacts on the back of the phone are that touch the back plate.
Click to expand...
Click to collapse
I haven't noticed a difference on either wifi or gps. I haven't even bothered to trim the battery yet, just slipped my silicone case over the battery to hold it in place. I kind of like the result - it's a lot slimmer than a plastic back with an extended battery case over it.

justDave said:
I haven't noticed a difference on either wifi or gps. I haven't even bothered to trim the battery yet, just slipped my silicone case over the battery to hold it in place. I kind of like the result - it's a lot slimmer than a plastic back with an extended battery case over it.
Click to expand...
Click to collapse
It fits a bit better and looks a little nicer if you trim the battery though.

ProBoner said:
It fits a bit better and looks a little nicer if you trim the battery though.
Click to expand...
Click to collapse
True. I went ahead and did it last night. The pack looks like it was built to be trimmed. Under the label, I found a plastic spacer which lifted right out. Then I just used a Dremel to cut off the remaining thin strip of plastic.
Thanks again for the idea.

After reading the whole thread, I bought this for only $9.99: http: // bit.ly/h6FUob (sorry I can't post links yet as I don't have enough posts on this forum :/ )
so I hope I did the right thing folks
cheers

hmm a 3000mah NON mungen... i wonder how good it will be for that price.
i hope you noticed it comes with a i9000 backplate not a captivate one...
the 3200mah mungens are going for 70 bucks still on ebay.

Seidio ACTIVE Case w/ Kickstand 15% Off Coupon

I've been waiting for a nice looking case with a kickstand. I just found this ACTIVE case from Seidio, looks like it just came out. I went ahead and ordered one. I'm hoping it will work with the extended battery, but if not... I may try just using that one as a backup. It'd be nice to find just the spare battery charger. I really don't want to buy another battery.
You can also get 15% off using the coupon code "winter11". Anybody else ording this case?
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I'll order when blue or red comes out. Or white.
Rabble rabble rabble.

The kickstand is cool but the sides look really ugly to me and if you don't put your fingers there when you hold the phone it might feel awkward. Bonus points for covering the top part by the ear piece though.

i had an active on my droid x and was pretty happy with it except for the size and weight, but the otterbox defender for the gnex is just WAY to big (IMHO of course). functional case and holster combos are few and far between and seidio provides a solid product.
right now i'm using a surface, have an active combo on the way and i'm praying they come out with a naked holster since once the 3 pin docks start showing up i'm not gunna feel like case stripping to dock all the time

I've had the Seido Active for my TB. While it's a great case! It felt extremely bulky and made the screen feel smaller. I went with the otterbox commuter this time. Seido is great! I dropped my phone dozens of times with no injuries to the inside.

Anyone received their Active yet? I'm looking for a review. I'm a long time Seidio Surface (Innocase) fan but they are on backorder and I like the idea of a kickstand.

Magnus_CA said:
Anyone received their Active yet? I'm looking for a review. I'm a long time Seidio Surface (Innocase) fan but they are on backorder and I like the idea of a kickstand.
Click to expand...
Click to collapse
YES! I want a kickstand. I saw the Verizon case with kickstand and I wanted it but I have the extended battery and I refuse to go cover-less just to have a case fit it. I've been using the hangout on mobile a lot and it sure would be nice to have a kickstand so I don't have to hold the phone up all the time as well.

D3TH METAL said:
I've had the Seido Active for my TB. While it's a great case! It felt extremely bulky and made the screen feel smaller. I went with the otterbox commuter this time. Seido is great! I dropped my phone dozens of times with no injuries to the inside.
Click to expand...
Click to collapse
Is the commuter about the same size as the active? I also used an active on my TBolt. Wanted to try Otterbox this time around though, and the defender is just way to big for me.

Zomb!e said:
Is the commuter about the same size as the active? I also used an active on my TBolt. Wanted to try Otterbox this time around though, and the defender is just way to big for me.
Click to expand...
Click to collapse
What I want to know is anybody with an otter box commuter have a seidio active holster? If it fits that might be the match I'm going for. I love the slimness of the commuter but need a face in belt holster for my job.
Sent from my Galaxy Nexus

Zomb!e said:
Is the commuter about the same size as the active? I also used an active on my TBolt. Wanted to try Otterbox this time around though, and the defender is just way to big for me.
Click to expand...
Click to collapse
I just got my commuter in last night. Otterbox has two day fedex shipping for under 6 bucks! Can't beat that.
I'll post comparison pictures tonight of my old active next to the commuter. The one thing I really miss is my kickstand, I feel so naked without it heh
---------- Post added at 09:37 AM ---------- Previous post was at 09:18 AM ----------
otterbox = Teh sex

Who actually has the Seidio case? Is the kickstand for it any good? I am also interested to hear if it fits on a phone with an extended battery.

Hey guys, I have the Seidio Active Case with metal kickstand for the OEM 2100 mAh hour battery, and I love it, BUT, there is a problem with it I figured I'd let you all know.
The metal kickstand and the thickness of the bump for it, interferes with NFC. As you may know, the NFC antenna on the Galaxy Nexus is actually in the battery, so it's as close to the back of the phone as possible. The Seidio kickstand goes right over the middle of the battery. It is very difficult if not near impossible, to do things like "back to back" transfers with my Nexus 7
(especially while my Nexus 7 is ALSO in it's Active Case. If I take the plastic outer part of the case off, that contains the metal kickstand and the bump, and just leave the
silicone/soft inner on the phone, NFC works just fine.
But with the outer part on, NFC is very hard to use for back to back. With a NFC terminal like for payments, it works better (as they generate a larger powered field - I test them
at work actually as part of my job).
I let Seidio know this, they don't have a plastic kickstand version for the OEM extended or their extended. I suggested they move the kickstand up higher, or re-engineer it to be
thinner and plastic.. but no changes yet.
For now i take the outer shell off when I want to use NFC back to back
You also can't get the cases for extended batteries in anything other than black.. I wish I could get Red for it

I found even with the extended battery there are NO gaps in the case! just pull the plastic a bit and its perfect!
Oh and if anyone still wants one for a bit cheaper I am selling mine cuz I gat a new SIII ;] http://www.ebay.com/itm/281037616353?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l264

Seidio extended backdoor and Active case pics

Update: swapped Seidio case for modified $5 bumper case + Seidio holster (details in second post)
Just some pics and first impressions of the combo.
I decided to order the extended battery and case/belt clip combo from Seidio. Just got it yesterday and charged it overnight. Working on discharging it before I go to bed... at 60% I had to watch a Youtube movie with the speaker on and wifi about 2 1/2 times.
I am not going to do a battery review but here are my reasons for getting this. I wanted an extended battery so that I can use all the battery draining things all the time without worrying about the battery dieing on me half way through the day. Yes, I can turn everything off and have it last 3+ days on the stock battery but wanted everything on for use at a moments notice as well as long phone calls, internet surfing, Navigation, WiFi, 3G+ (Tmobile 4G), GPS, Sync, possibly WiFi tethering in the future, etc. I liked the Seidio reviews and backdoor/case look and wanted the belt clip anyway.
Anyway, I really like the Seidio extended backdoor. I like it soo much I regret having to put it in a separate case... it feels good in the hand too. The battery is big and heavy (feels like the phone's weight was doubled). I don't know if the Mugen battery is the same size or not, as I didn't see any threads comparing the two. If I find reviews saying that the Mugen battery lasts longer I might have to get one before my next long trip (I realize they advertise it at 4600, but haven't read a comparison review to the Seidio). I like the Seidio back a LOT. However, the Active case really adds to the bulk and gives it a much bigger feel. I ordered a cheap bumper case which should be here in a couple weeks, but if worse comes to worse I could always cut down a normal case... I didn't have the heart to modify my Otterbox Commuter.
Extra plus and minuses... First, the kickstand is nice and is held closed by a magnet.. if you want a kickstand. However, it adds to the size of the case, which is already pretty big. Second, the case/backdoor shape seems to improve the sound from the speaker. Last, although there are protrusions holding on part of the rubber sides, I doubt they will stay in place with a sliding fall on the face. Not a huge worry, but for such a large case I wish the front was as secure as the Otterbox was... after all, the back is just protecting the Seidio backdoor, which I'm not as concerned about anyway.
As a side note, the Otterbox Communter fits fine in the Seidio clip holster.
Battery comparison:
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Back Door Comparison:
Edit: Some pics with the backdoor on the phone versus the Active case for size comparison.
Active Case vs Commuter:
Backdoor and Active Case pics:
Edit: Some pics with the backdoor on the phone versus the Active case for size comparison.
Hope this helps some of you considering this case.

Update: added pics to this second post of modified $5 bumper case used in place of Seidio case (will use Seidio case for harsher environments)
Another side note: Even without the backdoor and rubber undercase on, the Seidio battery does not fit under the Otterbox Commuter case... it is too big. The Commuter would have to be cut to fit the battery through. I have considered turning the Otterbox into a bumper case, but don't have the heart.
I've just came back from a two month trip in the Philippines seeing all sorts of environments and never really needed the extra protection of the Otterbox. I think if I go on other extended trips in rustic environments I would be fine with the Active case... although I believe the Otterbox Commuter holds the lip over the front a LOT better.
If anything, I might get a baggy case for taking pictures in the rain... I wish I brought it during the last trip since the Philippines was in the rainy season and there were many times I should have taken vids and pics where I didn't because of the rain. I tried a freezer ziplock bag which worked fine for screen controls but made pics very cloudy and blurry.
Updated pics of modified bumper case; slightly loose in Seidio holster but have been using it with the holster for a month now with no issues.

Thanks man. This is absolutely perfect. I've been looking into this but have been kind of skeptical. I think I shall get it now. It's just so expensive.
Apparently the Hyperion 4200 battery works with the seidio case. So I might get that battery and just buy the back door and active case from seidio
Sent from my SPH-L710 using xda app-developers app

Updated original post with pic of backdoor on phone vs Active case for size comparison.

Thanks so much, this is absolutely perfect Seidio extended back door and activities

Posted updated pics with modified bumper case suggested in this thread by Angeliou: http://forum.xda-developers.com/showthread.php?t=1908923&highlight=cheap+bumper+case