Develop Bugs

4800 mAh Extended Battery For Universal

4800mAh battery for HTC Universal & Variants
Why would one want a 4800mAh battery? I myself am an extremely heavy Pocket PC user. I listen to music, play games, test skins, organize my life, movies, email, web and the list can go on. Now just add talk time and a constant radio on to receive calls, this is where battery life can get depressing! So I purchased the 4800mAh battery from www.lionbattery.com to fulfill my powerful needs.
As of now I am in the process of getting a carrier plan/tariff. So in this matter I will not be able to test stand by and talk time on my XDA Exec. However if you would like to know how much more stand by and talk time you would get on your HTC Universal, I have a simple formula for you.
Example:
User 1 claims to get 7 hours of battery life per full charge. Convert your hours to minutes, 7 hrs = 420 min. Take the 420 minutes and multiply it by 2.962, then covert the result to hours by dividing by 60. Your result times may vary but User 1’s battery life is now 20.7 hours. This is a significant increase in battery life for a Universal!
Formula:
BL = Claimed Battery Life
H = Hours
M = Minutes
XH = Extended Battery Hours
XM = Extended Battery Minutes
Step 1
(BL) x 60 = (M)
Step 2
(M) x 2.962 = (XM)
Step 3
(XM) / 60 = (XH)
The formula given is based off the i-mate JasJar’s standard battery and may differ on variants. In addition the formula and battery life may not be correct if your device in not used consistently.
Now for the pictures! I am sorry on the image quality. My digital camera is dead and I am left with a PDA that has a sketchy 1.3 mega pixel camera. And Photoshop can only do so much.
Before The Extended Battery:
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With The Extended Battery Installed:
Overall the battery is very good quality and Lion Battery and their suppliers stand behind their products with great support, which I like. The new battery door goes where the original would go, so nothing is covered that isn’t necessary. The camera functions just like it used too, the new door has no affect on it whatsoever. All this power for am mere 1cm of added thickness.
Any other questions let me know.

How well does it do at 'laptop mode', sitting on the base in landscape mode, typing on the keyboard? Does the new cover have a few rubber feet like the original, so it doesn't slide (since the original rubber feet are now off the ground)? And does it rock at all when you type perhaps a little bit too wildly on the keys towards the edge of the keyboard?
Also, what's the added weight?

It does well in laptop mode. It doesnt rock or knock when typing in laptop mode. It does not have the rubber feet to keep it from slidding, thats one flaw.
It does feel heavier, but not significantly. I am the wrong person to ask the weight questions, since I wieght lift anything under 5 lbs in nothing to me.

can you take a picture from the button view, please? I guess there is a wide 1 cm gap between the new cover and the camera?

Can you please post more pictures of the cover and the battery separately, and close-ups please.
More comments on quality of the cover and ease of putting it on the unit please.

3200mAH
Ok i got myself a 3200mAH from the pdashop.nl at 59 euros.
I took some pictures to show you that it looks really good and not a botch job. (Cant see it very well on your pictures of your 4800mAH but it seems it looks crooked at the bottom?)
If you check out the pictures below you will see it looks really good and i would recommend it to anyone!
Huge difference in play time as compared to the original 1600mAH, charged it full yesterday at 13:00, made a few phonecalls played about 20 minute of games and then last night i used it almos 4 hours with wifi on to chat on MSN.
This morning at 10:00 the battery life was still at 73% :shock: WOW the old battery would have been empty already.

Thanks for the pictures dvl. Can you post a link on where you bought yours please?
I hope Bump That could also post nice quality close-up pictures, as I prefer to buy the 4800. If I am going to use a chunky Universal, I'd go for the higher capacity one.

I will post more pictures later today. The entire new battery door covers evenly and symetrically. So everything is even and not crooked.

ehh
hej bumb that..
it must be that piece of plastic you have underneath your phone which kinda makes you wonder if it is crooked.. lol
ok reason i got mine is because it was only 59 euros..
i find 200 euros a lot of money.. but that is of course up to the user itself.
I bought mine at www.pdashop.nl

Its actuall two hundred USD 200.00 USD = 160.00 EUR (about)
Some more pix.

hmm
hej a mate of mine has a similar battery cover like that one used for the 4800mAH when he takes a picture with the camera it gives a rounded edge around the picture? does yours have that too? The distance to the lens cover has been heightend and creates problems. Would be nice to see a picture take with that cover on?
anyway looks like a neat cover. and 160 euros sounds way better.. maybe someone should do a comparisment between the 4800 or the 3200mAH would be nice to see some graphical tests.
:lol:

Thanks for the pictures guys. I like the cover of the 4800 even though it covers part of the lens. I don't use the camera app anyway. I prefer it because it creates an even bottom with a wider surface area, better for typing on surfaces.

The camera works perfectly fine. WOrks just like it did when I had the standard battery and cover on.

BUMP THAT said:
The camera works perfectly fine. WOrks just like it did when I had the standard battery and cover on.
Click to expand...
Click to collapse
How about the flash?

am I stupid?
call me silly, but why not 'make' a charger for the device
just a bunch of 4 NIMH batteries gives you 5V
bung 'em on a USB connector
and voila, you have a portable charger
heck, even if it don't work at 4.8, use 5 batteries in series and a diode, that'll give you 6v - 07 = 5.3, or even use a low dropout reglator

shuflie said:
BUMP THAT said:
The camera works perfectly fine. WOrks just like it did when I had the standard battery and cover on.
Click to expand...
Click to collapse
How about the flash?
Click to expand...
Click to collapse
Honestly I havent use the flash since I got my Exec. I only used the camera app 3 times. All I do i listen to music.

Just when I wanted to order, the 4800 is OUT OF STOCK.

Re: am I stupid?
bleugh said:
call me silly, but why not 'make' a charger for the device
just a bunch of 4 NIMH batteries gives you 5V
bung 'em on a USB connector
and voila, you have a portable charger
heck, even if it don't work at 4.8, use 5 batteries in series and a diode, that'll give you 6v - 07 = 5.3, or even use a low dropout reglator
Click to expand...
Click to collapse
imho thats useless.. you would only take the "charger" with you when you know that you would need the extra battery power afterwards, but then you could also charge in advance. and i doubt that anyone will always carry that thing around, just to make sure to have enough battery power for any possible situation.
with the 4800mAh extended battery you dont have to think "do i need more power afterwards or not?"

Is there any other site where we can buy the 4800 Mugen Power Batteries? I tried searching, but did not find any?

Not that I know of. I waited for about 3-4 weeks for them to come back into stock to get mine.

Sprint HTC Evo Extended Battery (2600 mah)

Sorry if this already has been posted, I did not see it posted anywhere on here.
I just went to return my car dock at Sprint and they said they had just received shipments of Sprints' own extended battery + covers for sale. It was $54 after taxes. Comes with 2 covers, one white which is painted so it's smooth, the other a black that has the rubbery finish on the back.
Not bad for the price, I mean sure it can't beat the Ebay ones (which I ordered the 2 3000)
I am going to guess this is basically a Seidio rebrand?
Pics:
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Did you see any cases for it?

No I did not. I asked but they said they do not know of any coming out yet. I can't find this battery announced anywhere so it must be a brand new item from Sprint, guess I got lucky.
Sent from my EVO using XDA App

jesus it makes the evo look like a damn hunchback. i wish these companies would make these slimline only.

With phones outpacing battery technology by a very large margin, this is the only way so far. I mean there is the option of carrying a second battery, but that seems a little unnecessary. I'll trade aesthetics for convenience and utility.

Can these be purchased online?
mr2man07 .. how are the 3000mah batteries working for you, have you tested them? I've read eBay batteries are lower than actually rated as they arent regulated, even the Seidio's are falsely rated.

Thanks for the heads up, gonna pick one up tomorrow...
Just picked it up , charging .. Got the last one in the store ....
HtcEvo 4G

Plancy said:
Can these be purchased online?
mr2man07 .. how are the 3000mah batteries working for you, have you tested them? I've read eBay batteries are lower than actually rated as they arent regulated, even the Seidio's are falsely rated.
Click to expand...
Click to collapse
I do not even think they are announced from Sprint yet. I managed to get lucky and the guy told me they had them in stock if I was interested. Told me it was $49.99 and I jumped on it.
I have yet to receive them. They are still about a week out, maybe less. This one has only dropped about 15% over 5 hours of moderate-heavy usage. This is on the Fresh rom with battery-config script.

They are online
http://shop.sprint.com/NASApp/onlin...dAccessoryID=&topPageNumber=0&subPageNumber=1

Do you know if they add the same height as the seidio 3500? I have the innocase extended on mine with the innocase extended holster ordered. I wonder if it would work with this battery. Also let us know how the battery does. I wonder how many actual mah it is.

I have no idea how it compares to a Seidio. I have not had the opportunity to do a comparison.
Sent from my HTC Evo

Keep us posted on the performance. I think it will probably been on par with the 3500 batteries.

nice find!
now if we could only get an OEM extended slim battery.
i just can't bring myself to use an extended back. i love my cyclops case too much.

SpaceMonky said:
nice find!
now if we could only get an OEM extended slim battery.
i just can't bring myself to use an extended back. i love my cyclops case too much.
Click to expand...
Click to collapse
Its not oem but people are having some success.
http://forum.xda-developers.com/showthread.php?t=810182

fast2049 said:
Its not oem but people are having some success.
http://forum.xda-developers.com/showthread.php?t=810182
Click to expand...
Click to collapse
awesome, thank you!

ElAguila said:
Keep us posted on the performance. I think it will probably been on par with the 3500 batteries.
Click to expand...
Click to collapse
30 minutes of Angry Birds, 30 minutes of Reckless Racing, 30 minutes of browsing and 3 youtube videos, the rest being standby with WiFi at 7 1/2 hours total time uncharged, it barely dropped 20%. Whereas my oem battery would be around 40-50%. This being on only the batteries first full chrage.
I love it, it is no longer mandatory to put the phone on the charger just to navigate to clients for work, or to be able to use tethering.
I am a Network Technician, and I use my phone a LOT during work days, and this battery will help me greatly.
Obviously, this is not for everybody. I see my phone as a utility, a tool for my job and a personal gadget/toy on off-hours, not some fashion device, so its "beauty" is not as important as its functionality.

Jesus H Christ, that backplate and battery looks bigger and crappier than my Chinese-made 3500mAh, which I got two of at just over 1/3 the price.

im new to the forums but been following and taking UR guys advice for a while....anyways I just picked one of these up today to. Last one at that. I was gonna get the 3500 mah battery from hk right before I bought this one but went with this since oem. I would like to see how long it last.
Update: its now close to 6 hours of being in my phone under heavy usage and it hit 15% and that was out of package with no charging.

rickg82 said:
im new to the forums but been following and taking UR guys advice for a while....anyways I just picked one of these up today to. Last one at that. I was gonna get the 3500 mah battery from hk right before I bought this one but went with this since oem. I would like to see how long it last.
Update: its now close to 6 hours of being in my phone under heavy usage and it hit 15% and that was out of package with no charging.
Click to expand...
Click to collapse
Rule of thumb on these is most batteries are shipped with a 50-60% charge from the manufacturer . It also has yet to be seen if this battery is truely a 2600mah . As its well known from Batteryboss even the Seidio doesnt hold a true 3500mah charge . From batteryboss the Seidio is only holding 80% of its advertised capacity . If the battery from Sprint holds true to that ratio it still will hold a charge of 2080mah (This is just theory and estimated) . You should see an improvement over battery performance from stock . Give the battery a few charge / discharge cycles .

Just grabbed one last night and not really sure if Im gonna keep it. The main issue I have is my phone is completely naked now. Ive got no holster or protective case and Im paranoid about dropping it. Gonna try and see if theres some type of case at best buy tonight that will fit this battery even if I have to modify it.
As far as life goes, Just took it off the charger so gonna try and use it heavier than normal today and see what I get

QCell Epic 4G Touch 3600mAh Extended Battery / 1950mAh Slim battery

QCell Epic 4G Touch 3600mAh Extended Battery and Epic 4G Touch 1950mAh Slim Battery
http://www.amazon.com/gp/product/B006SK5HHW
http://www.amazon.com/gp/product/B006SK5MCW
Here are some pictures of the batteries:
Extended
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Slim
Extended vs Slim Thickness comparison:
Slim holds around same charge as oiriginal.
Still testing out Extended. So far giving me full day use with 10% left

I just can't do it. I'd rather carry my charger with me in my pocket than turn my beautifully slim and sexy E4GT into a mutant. Thanks for posting this though.

IA-32e said:
I just can't do it. I'd rather carry my charger with me in my pocket than turn my beautifully slim and sexy E4GT into a mutant.
Click to expand...
Click to collapse
same thought but i DID buy an extended battery anyways. Charged it 100% and shoved it along with the ugly battery cover in my car's glove box for emergencies.

frifox said:
same thought but i DID buy an extended battery anyways. Charged it 100% and shoved it along with the ugly battery cover in my car's glove box for emergencies.
Click to expand...
Click to collapse
very good idea!

Damm I get 1 day on my stock battery
Sent from the future

I have the 1950 and its worst than stock battery for me I get only 4 hours smh

thatdudepoops said:
Damm I get 1 day on my stock battery
Sent from the future
Click to expand...
Click to collapse
Same here. Calibration helps a lot.

An additional 150ma, if that number is even true, you won't notice any difference compared to the stock battery. That small of increased capacity isn't enough to be noticeable.

oscarthegrouch said:
An additional 150ma, if that number is even true, you won't notice any difference compared to the stock battery. That small of increased capacity isn't enough to be noticeable.
Click to expand...
Click to collapse
If it's accurate, it's a touch over 8% gained. Rough math, but if you get 12 hours use out of stock 1800mah, then 1950mah will give you an additional 57 minutes.

That is a horrid looking battery door. I too have no problems making an 18 hour day on my stock battery. Wonder if a Tpu case will stretch over the battery with out the battery door.

The extended cover looks better physically than in picture. Its rather it's easy to grip the phone now with the extended battery with my big hands. Battery still holding out nicely as before.

My extended battery (note: it's actually 3800mah) and door came today and I must say, I am damn impressed.
This phone, even with extra-deep door, is thinner than the Galaxy S1 I just came from, so I'm strongly considering leaving it on all the time.
The extra depth and curved door is also good for holding the phone in your hand.
It's a great purchase. I bought generic off eBay for under $10.

I will say this is better than generic
it's on par with trexcell although both are of same mAh

I just purchased the 1950 slim version. Have been using it for 3 days. I got Battery Monitor Pro so I could determine true battery amperage. It's telling me 2366mAh right now but I need to give it a few more days before it settles in.

Hey nubsors I've heard those apps cant truly measure mAh curious to see how accurate it ends up being. I have a generic battery and I'm curious about its real rating.

place a stock oem battery and have it measure it

Any of you wanna send me one to test?? I'd gladly test one with my equipment and publish it over at my Epic4G Battery Reviews thread. I'd also be curious if it'd fit under one of my generic cases (regular Epic4G here) just for kicks but I can review the battery no matter what.
I'll send it right back after I get 3 solid runs of collected data for consistency.

someguyatx said:
Hey nubsors I've heard those apps cant truly measure mAh curious to see how accurate it ends up being. I have a generic battery and I'm curious about its real rating.
Click to expand...
Click to collapse
Well all I know is I definitely get better performance than the OEM.
Sent from my SPH-D710 using xda premium

Frifox, Gotta be careful, the high temperatures in the car will probably kill your battery... Probably want to check the charge before you take any long road trips where you might really need it.
Sent from my SPH-D710 using xda app-developers app

Estimated mAh for the battery has dropped significantly in the past three days from over 1950 to 1685.
Sent from my SPH-D710 using xda premium

Hyperion Extended Battery

Ordered this a few days ago and it came in the mail today, it says for the i9300 (international) but I took the chance and it works great for my AT&T version.
http://www.amazon.com/gp/product/B008BVIV06/ref=oh_details_o01_s00_i00
It's a Hyperion 4000mAh extended battery. Its about the double the thickness of the stock battery and has a new back cover to come with it. On the card included with it, it suggested a 12 hour initial charge and then 4-5 cycles to reach full potential. I will be following up on the thread periodically over the next few days with some screenshots and other thoughts on how the battery is working out for me.
However, initial impressions are good. The back cover is good quality, however very slick compared to the stock one. The thickness with the added battery isn't terrible, and will definitely be worth it if it doubles the battery life like it should.

On the amazon site it looks enormously thick, like a half of an inch or so, can you measure it for exact thickness please?

obender said:
On the amazon site it looks enormously thick, like a half of an inch or so, can you measure it for exact thickness please?
Click to expand...
Click to collapse
5/8" thick total. Like I said, it makes it quite a bit thicker but double the juice... You gotta put it somewhere lol. At least it looks a lot better than the Note extended batteries did, those looked atrocious. There was just a bump where the battery was but behind the camera was stock thickness and it looked horrid.

Does the battery have the NFC antenna?

No nfc and bulky on a rather sleek n sexy phone...no go here. Plus the battery life on this thing is SICKKK, why the need for the extended batt? I could reason with an extra battery.

Well to add to my review, the back panel breaks VERY easy. My phone took a 2 ft tumble off my bed and it took a chunk out of the battery panel that came with the extended battery.

I was thinking of either getting an extra battery it just buy one of those battery packs that recharges the phone. Friend has one of the Energizer packs for his iPhone and it appears to work really good, that he bought an extra one.
Sent from my SAMSUNG-SGH-I747 using xda premium

I bought one of these a year ago and it works awesomely
http://www.newegg.com/Product/Product.aspx?Item=N82E16875993507R
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I use my own AA rechargeable batteries (instead of alkaline disposables, which also work fine)
(I don't charge the AA's with its included AC plug, though, I have a better charger I use)
hard to beat $8

Beakerzor said:
I bought one of these a year ago and it works awesomely
http://www.newegg.com/Product/Product.aspx?Item=N82E16875993507R
I use my own AA rechargeable batteries (instead of alkaline disposables, which also work fine)
(I don't charge the AA's with its included AC plug, though, I have a better charger I use)
hard to beat $8
Click to expand...
Click to collapse
Unfortunately, $6 shipping.
Looks nice though with an equivalent storage of approximately 2000mAh with 4 NiMH's in it @ 5v or 10Wh (minus whatever conversion losses, probably about 10% so 9Wh). Original battery is about 7.8Wh capacity.

if you want a good external battery pack goto amazon. serach for vaas battery. get the $28.99 shipped one with the 2.1 amp output
sadly its mini usb not micro to charge but at least its STANDARD and not proprietary. it charges up my S3 just fine should be able to get 2 full charges out of it or run the phone for DAYS if you use it while the phone it already fully charged.
it is by far the best battery pack I have purchased yet I would not by anything else.
they have a cheaper one. SAME battery but less amps on the output. if you buy 2 to avoid shipping its under $16 a pop ($15.70 each) but I am not sure if it has enough power to charge. I know the 1amp outlet on my unit does NOT properly charge my S2/S3 (trickle charge) I have to use the 2.1 amp outlet.

Stock charger for the S3 is 700mA so a 1A charger should be more than enough. Some dual port chargers list 1A but limit each port to 500mA. I sometimes wonder if using higher capacity chargers (I've been using some HP Touchpad 2A chargers) might have thermal issues shortening battery life. But, I like the quick charge.

my stock s3 charger is 1A ??
there is "port" differences. I have a VAAS battery pack I use (6 of them I power a lot of stuff) and the 2.1 amp port charges the S3 fine but the 1A port is "slow" (trickle??)

Anyone having problems with this? Fit, finish and signal?
I just got the Hyperion Extended battery with the dark colored back. I also got their case to fit it.
All was well when I put the new battery in and covered it up with the new back cover. I then installed the case and left it to charge. That took about 3 hours to go from 58 to 100.
When I picked up the phone, I noted that there was no telephone signal (at home it was on wifi). I checked the settings (not in airplane mode) and then turned it on and off again and it was still no telephone signal. So, I took the case off, put the old battery back in and all was OK. I switched back and the signal is now good.
I noticed that the back cover was dirty. I thought I had gotten some kind of smudge on it so I wiped it off. The smudge just got bigger. The cheap coating of paint was coming off.
Earlier, I had noted that the charger plug didn't feel quite right. When I looked closer, I saw that the small top part of the opening for the plug didn't quite fit. We're talking a millimeter or so, but it doesn't quite fit. It is so thin that I cannot consider cutting it.
My first inclination is thinking that Hyperion is junk. Since I have been considering getting a new, bigger battery almost since I got the phone a couple of months ago, I don't want to give up.
So, what are your experiences with this company's products? If I send any part back, I have to send it all back. The battery came with the big cover so if I send back the cover, the battery goes with it. If I send those back, I don't need the case.
Where do I go from here?

I just bought the Hyperion as well. So far, so good. I did get the Hyperion case as well. The power and cooling buttons are really hard to push. Can anyone suggest another case that will fit the Hyperion?
Sent from my SPH-L710 using xda premium

No issues with mine so far. No signal issues like other member mentioned. The back cover fits very well. Charger plugs up with no problems.

Vote: 8000mah Nexus 5 extended Battery. Will you buy?

I love travel, especially remote area. I want a great phone with long lasting battery. Nexus 5 is a great phone, but battery only last less one day under moderate use.
So I made a extended battery, the capacity is about 8000mah, 3.6 times of the stock battery:
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I am waiting for the 3D printed back cover to finish this project. According to my test, under normal use, this phone can last 3-5 days with one full charge. The charge time is about 5-6 hours. My wife love it too, I am making another one for her. She asked me why don't mass produce it and sell?
The only thing about this extended battery is the complexity. Like other recent cell phones, Neuxs 5 put NFC, wireless charging coil, antennas and vibrator on the back cover. So to make this extended battery work on Nexus 5, beside the 8000mah battery. I also designed NFC Coil, Wireless Charging Coil, WiFi Antenna, GPS Antenna, and a vibrator. All these components adds up the cost. The retail price may reach $70-80.
I started this battery as a hobby. Is here anybody like my design, and think I should mass produce it? Will you upgrade your Nexus5's battery to 3.6 times for $70-80?

Yes!!!

At that price? Yes, really just depends on the bulk added
-guess

Looking good! 8000mAH is a lot of juice. How much bulk (in term of thickness and weight) is this going to add?

This is a great idea, but way too big. If you made one with a 2000mah battery I'd be all over it. Good luck!

I would take one for that price.
Sent from my Nexus 5 using XDA Premium 4 mobile app

God damn!! I wouldn't mind using it, ingress destroys my battery.

Sheesh that's a lotta juice!
Looking forward to seeing that cover and how the phone looks after juicing

How about adding a MicroSD slot, I'd imagine you could graft it onto the usb port somehow... I never understood why nobody does that.

kokoon said:
How about adding a MicroSD slot, I'd imagine you could graft it onto the usb port somehow... I never understood why nobody does that.
Click to expand...
Click to collapse
Technically, MicroSD slot is doable with the usb port, but we may need to cut off the data wires of the usb port. I haven't tried that yet. Don't know if the SD card and USB data can be connected at the same time to the PC / Mac.
==========================================
Thanks Everybody for the supports. I am glad to see you guys are interested.
I worry most about this mod is the installation part, since Nexus 5 is not deisgned with a removable battery. Please let me know if the following installation is suitable for most of users:
1. We need to take your nexus 5 apart to take the original battery out.
2. Install the small battery of the extended battery and plug in the connectors.
3. Install the circuit board which connects the vibrator, antennas and coils.
4. Flip the large battery back to cover the small battery.
5. Connect the coils on the large battery to the circuit board.
6. Snap the extended battery cover on. (Coming Soon).
Please let me know how do you guys think about the installation part.
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About the thickness: according to the 3D file, the thickness is about 17.5mm. I think it's okay.
The last phone with extended battery I used is HTC Sensation XE, with the extended battery is 18.5mm for only 3800mah
The thickness of galaxy s5 is even thicker: 21.4mm for 7500mah (With this thickness, we can make about 10000mah for nexus 5).
The thickness of s4 is 17mm for 6400mah

OMG like really this would be awesome could you post some pictures of your phone with the inserted?
And ps be sure to ship outside the US too

The worst of Nexus 5 is the battery...
This "mod" its awesome! I cant wait to see the Nexus 5 ensambled with the 8000mAh battery!!
Sent from my Nexus 5 Unchained using XDA Free mobile app

I'll Buy

this is awesome. Though i would prefer something along the lines of a 3000mah battery, just so its that much thinner

This looks pretty cool. Can't wait to see how it turns out.

Just perfect
This would be soooooo good. The installation doesnt look hard and you are getting 8000 mAh. Ridiculously good.
Waiting to see that final image with the printed back cover.
I will buy it

This is very good work you've done. But it is a very niche product. Not many people are willing and able to disassemble their phone. Fewer of them own a Nexus 5. Fewer of those want a bigger battery and will ever learn about your product. And fewer still will swallow the price.
I encourage you to charge as much money as you need to, so you can make up for the low sales volume. Don't short-change yourself. This looks like a $100+ kit to me. Maybe you can hold a group buy, massdrop-style, where the price falls as more people commit to buy.

I'd definitely pay for it, well worth the money! but would want a bulky case to fit it lol.
Easily $100 or more wouldnt pay more than $150!
Like he said it's something only certain people would buy and be able to fit it properly, well I would!

I would love to have that battery power but i'm afraid that thing will ruin camera performance.
An extension battery pack can't add any thickness where the camera sits, otherwise it will impact on camera

If it's not bulky, I don't mind paying up to $100-$150. It would be nice if you can make the size smaller and fit it inside.