Database Users

charging a spare battery

Bit of a dilemma on this one.
With my previous XDA IIs i could use the cradle to charge up a spare battery as I often used it to watch films whilst travelling by train so a spare battery was a must for the return journey.
No that the xda EXEC doesnt' come with a cradle what would be the best soloution to charging a new battery , is there any other option rather than having to swap a fully charged battery already in the phone to a spare and then just do it that way or is there an external soloution i coould use?

Extend Battery life - possible solution?
I agree with you there - I had a M1000 before my Exec & it was real handy to get an instant full battery charge using the spare.
In response to your query:
Don't know if this would be any good to ya -
http://www.thepocketsolution.com/Me...ry_Code=spv_m5000_accessories&Product_Count=9
Extends the battery life using A4 batteries.
Personally - I have a spare mini USB cable I carry with me to hijack my work (and other people's) USB ports for a quick top up whenever I needed it. :lol:
(Some trains provide plug sockets to be used for laptops, etc - you could use this - but that would mean carrying about a big awkward plug!)

Yeah thats one soloution, I had already seen that and considered it, If anyone ever produced a spare battery charger for the EXEC would make a bomb, I bought the cradle type charger from expansys but if only that would make a combined charger and spare battery charger in one unit that would be perfect.

extra battery....
Check out this thread...
http://forum.xda-developers.com/viewtopic.php?t=34638
8800MaH external battery for Universal. MAD JUICE. Movies music travel... whatever... nice.
Cyb

You can use 4x2500 Mah or better rechargables in the battery extender of Knight_Mayor so thats even more then 10.000 Mah.
Also you can carry 4 extra charged batteries with you to replace them.
So it's a much cheaper and better solution.

I think the only viable option at the moment for myself is to just buy a spare battery and stick in the exec and charge it up and then replace with the other and charge it and then just carry the spare battery around with me like I used to.
Any other soloution involves carrying around another piece of kit which kind of defeats the object
bit of a PITA but until someone releases/creates a cradle and spare battery charger seems the best way.

cotc2001 said:
I think the only viable option at the moment for myself is to just buy a spare battery and stick in the exec and charge it up and then replace with the other and charge it and then just carry the spare battery around with me like I used to.
Any other soloution involves carrying around another piece of kit which kind of defeats the object
bit of a PITA but until someone releases/creates a cradle and spare battery charger seems the best way.
Click to expand...
Click to collapse
I used to do that with my MDA II.
But now I don't have a cradle which can recharge a second battery seperatedly, and I don't have a second battery.
The good part about this battery extender is that it's small, it recharges your universal and you don't have to take out your battery, no need to turn off your universal, and no need to reenter your pin code.
So in fact it's a mobile charger, when you are walking or have it in your briefcase keep it fully charged and when you want to use the universal just unplug it.
That Extender is great and cheap.
Shipping cost worldwide is only 4 dollar.
Total cost = 14,95 + 4 dollar worldwide by airmail letter post = 18,95.
The best deal you can get.
I'm gonna order one myself today .

Check This out !!!
Here is a Universal Owners Dream Come True.Havent bought from this person yet,but the offer sounds to good to be True:
http://cgi.ebay.co.uk/Battery-Charger-for-O2-XDA-EXEC-I-mate-JASJAR-Qtek-9000_W0QQitemZ290136694073QQihZ019QQcategoryZ75446QQrdZ1QQcmdZViewItem

Seidio 1600 mah OEM Sized Extended Battery for Tilt/Kaiser/TyTN II

Seidio 1600 mah OEM Sized Extended Battery for Kaiser/Tily/TyTN II
- about 10-15% increase in capacity
- Same size as stock battery (Use OEM door)
- Japanese Li-polymer cell
http://www.seidioonline.com/index.asp?PageAction=VIEWPROD&ProdID=884

pre-order only atm. Shipping starts on 11/19. I've been watching this myself...

Sleuth255 said:
pre-order only atm. Shipping starts on 11/19. I've been watching this myself...
Click to expand...
Click to collapse
The shipment came earlier than we expected. The shipping for this battery began today (11/14)
Thank you for the patience.
Seidio

Hey Seidio, will you be making a compact stand-alone travel charger for these batteries? I got one from you for my 8525, it had swing-out power prongs and was very high quality, gold contacts and everything. Very much hope you will consider this!

I took the plunge. I just ordered one of these, along with the rubberized holster.

do you think it is possible to make batteries with bigger capacity at oem size?
1800mah....

Car Cradle?
Will a car cradle be avalible, like the G4600T?

pepeto2001 said:
do you think it is possible to make batteries with bigger capacity at oem size?
1800mah....
Click to expand...
Click to collapse
The shrink ray hasnt been invented yet
I wonder when/if they will have a 3200mah version?

randomtask16 said:
The shrink ray hasnt been invented yet
I wonder when/if they will have a 3200mah version?
Click to expand...
Click to collapse
When people are prepared to walk around with a car battery in their pocket

lmaoooo hahahhahaha forget about generators on a black out... i got my cell phone

pepeto2001 said:
do you think it is possible to make batteries with bigger capacity at oem size?
1800mah....
Click to expand...
Click to collapse
We always maximize our batteries to the highest capacity available. We'd put 3000mAh in if we could, but the technology just isn't there yet.
Thanks

anyone tried HTC TyTN II High Capacity Battery 2700mAh
http://www.gpsforless.co.uk/product_details.php?id=11658 ??

My battery shipped today. Should have it soon.

pencilcase said:
anyone tried HTC TyTN II High Capacity Battery 2700mAh
http://www.gpsforless.co.uk/product_details.php?id=11658 ??
Click to expand...
Click to collapse
Good God, i'd need to be absolutely desperate to ever resort to that...i'd rather carry a second normal battery in my pocket 24/7 before I got that

seidioseidio said:
We always maximize our batteries to the highest capacity available. We'd put 3000mAh in if we could, but the technology just isn't there yet.
Thanks
Click to expand...
Click to collapse
Does your current extedned OEM size battery have the metal plate?

Metal corner contacts?
seidioseidio said:
Seidio 1600 mah OEM Sized Extended Battery for Kaiser/Tily/TyTN II
- about 10-15% increase in capacity
- Same size as stock battery (Use OEM door)
- Japanese Li-polymer cell
http://www.seidioonline.com/index.asp?PageAction=VIEWPROD&ProdID=884
Click to expand...
Click to collapse
Does this battery have the metal plate and the corner contacts?
I got a 1600 mAh battery on eBay and it works, but it doesn't have that metal contact plate, and I'm concerned because there's got to be a good reason HTC made it that way. I'm guessing it has to do with the massive heat generated when using GPS and Bluetooth together.

I ordered one from them and was shipped yesterday per their email. As soon as I open the box, I will post either way. Has anyone contacted HTC to question this? They probally say that the original is better. I will send them a email now to ask!!

I cannot just do with extra 10 to 20% - I am getting one of these www.gpsforless.co.uk/product_details.php?id=10708 any time ...
1350 mAh + 5400 mAh means I will be able to get by an entire day, and still use GPS and so on. And no need to turn my Kaiser off to change the battery, just plug in and it starts charging, end eventually running off the external battery when the internal has recharged.
Yes, it is another 148 grams and has dimensions of 106 x 40 x 24 mm, but for me it's worth to have that in my bag. In my work I often have no access to power sources I can (or may) use.

LGB said:
I cannot just do with extra 10 to 20% - I am getting one of these www.gpsforless.co.uk/product_details.php?id=10708 any time ...
1350 mAh + 5400 mAh means I will be able to get by an entire day, and still use GPS and so on. And no need to turn my Kaiser off to change the battery, just plug in and it starts charging, end eventually running off the external battery when the internal has recharged.
Yes, it is another 148 grams and has dimensions of 106 x 40 x 24 mm, but for me it's worth to have that in my bag. In my work I often have no access to power sources I can (or may) use.
Click to expand...
Click to collapse
Do you really use GPS that much outside of the car? Otherwise, it shouldn't even be an issue with a car charger.

Just received my battery and it doesn't have the metal contacts on the battery. I'm waiting on HTC to email me back as to what are they and how important they are... I'll charge it Tonite to get a full charge on it, and post back 2morrow. It feels a lil funny. On the edge, there's a "space' that goes down the battery.. interesting
Also, it's a lil lighter than the original.

At&t Tilt 8925 2800mAh Battery Finally in Stock!

Finally, an extended battery for the tilt.
I stumbled across this website http://www.talkietech.com/htcat89ti24e.html. It's thicker than the Seido's standard battery but it's a 2800mAh and it comes with a back cover.

I wish there could be a way to findout if the design is OEM with these newly available battery from 3rd party vendor.
I'm more concern with the metal plate & the 4 corner contact points like the original battery ... it is designed that way for a reason !!!
http://forum.xda-developers.com/showthread.php?t=329692
~~~

Seidio 3200 mah super extended battery
Seidio is working on an 3200 mah extended battery for Kaiser that is thinner than this 2400 battery.
Seidio

Seidio 3200 mah super extended battery
Seidio is working on an 3200 mah extended battery for Kaiser that is thinner than this 2400 battery. It requires a new door.
Seidio

I received an e-mail from talkietech and they informed me that it's actually a 2800mAh, as to the metal plate I'll let you know if it has them once I receive it.

this post is for seidio by the way. sorry bout that

I want a Extended Battery for At&t Tilt
But i Hate for my Phone to look like a Women lol
with its ASS coming out
Where can i find a Extended Battery for Tilt
whic has more juice & no ASS (like the one comes with it so fits & looks original back)
Also when we searching for Extended Battery
If it says Extended Battery Tytn II / Kaiser etc
all the same or i should get just get the one which says Tilt only

I bought this one. So far it works great. Same size as the OEM battery, no new cover needed. The batteries are made in Hong Kong. They ship from HK and take at least a week.
http://www.batteryupgrade.com/produ...d=17769546&searchphrase=HTC%20P4550%20battery
ilordvader said:
I want a Extended Battery for At&t Tilt
But i Hate for my Phone to look like a Women lol
with its ASS coming out
Where can i find a Extended Battery for Tilt
whic has more juice & no ASS (like the one comes with it so fits & looks original back)
Also when we searching for Extended Battery
If it says Extended Battery Tytn II / Kaiser etc
all the same or i should get just get the one which says Tilt only
Click to expand...
Click to collapse

duplicated

c6638746 said:
I bought this one. So far it works great. Same size as the OEM battery, no new cover needed. The batteries are made in Hong Kong. They ship from HK and take at least a week.
http://www.batteryupgrade.com/produ...d=17769546&searchphrase=HTC%20P4550%20battery
Click to expand...
Click to collapse
How much battery life does it give more than the original

yellowlaser said:
Finally, an extended battery for the tilt.
I stumbled across this website http://www.talkietech.com/htcat89ti24e.html. It's thicker than the Seido's standard battery but it's a 2800mAh and it comes with a back cover.
Click to expand...
Click to collapse
cheaper here:
http://cgi.ebay.ca/2800mAh-BATTERY-...ryZ15034QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
again ... I wouldn't buy any of these unless I know it matches exactly with the metal plate and the 4 contact points !! just putting out the info ... shop at your own discretions !

yellowlaser said:
Finally, an extended battery for the tilt.
I stumbled across this website http://www.talkietech.com/htcat89ti24e.html. It's thicker than the Seido's standard battery but it's a 2800mAh and it comes with a back cover.
Click to expand...
Click to collapse
do u ship the back cover also ?
cos seems too real low price for battery
will it work on Tilt

ilordvader said:
Where can i find a Extended Battery for Tilt
whic has more juice & no ASS (like the one comes with it so fits & looks original back)
Click to expand...
Click to collapse
The 1600 ones have about 20% more battery life, according to users. You can't expect something for nothing - if you want a dramatic increase, you need a dramatically larger battery.

ilordvader said:
do u ship the back cover also ?
cos seems too real low price for battery
will it work on Tilt
Click to expand...
Click to collapse
Yes it came with the back cover. The battery works perfectly.

Ypocaramel said:
The 1600 ones have about 20% more battery life, according to users. You can't expect something for nothing - if you want a dramatic increase, you need a dramatically larger battery.
Click to expand...
Click to collapse
YES & I want6 HTC to know THAT
so they make Phones with MORE Battery life
at least 8hrs of Talk time
& they Know PEOPLE Will PAY
so y they dont make it in the 1st place

ilordvader said:
YES & I want6 HTC to know THAT
so they make Phones with MORE Battery life
at least 8hrs of Talk time
& they Know PEOPLE Will PAY
so y they dont make it in the 1st place
Click to expand...
Click to collapse
Ummm, batteries are not a magical thing that you can just get any amount of power into any size battery. If you want more power, you have to accept more bulk and weight. Consider Seidio's upgrade, OEM sized, battery. Stock battery = 1350 mAh; seido upgrade = 1600 mAh. Of course Seidio is going to pack as much juice into an UPGRADE battery as possible and they only could put in 250 mAh more. If you want more power, you will have to have more bulk, which means a battery sticking out the back with a new cover. As most consumers are very concerned about the bulk of their mobile phone, it would not be a good move for stock batteries to be this huge.
No offense, but "at least 8hrs of Talk time" is just an unrealistic request, unless you are ok with a battery that is just as big as the device itself. If you are okay with that, then great, except there probably will not be such a battery available to buy.

fitted case for battery "ass"
it'd be great if there was a fitted case that would take in count the extra battery "ass". (as ilordvader puts it).

Who here has the Fatter Battery ?
Can you tell me how much Talk time you getting on it ?
Thank you

I notice that the 2800mah battery I got last only about the same as my DynaPack. I've only used it 3 days and have been charging it overnight every night. Are your extended battery last as long as it should. I mean like 2x the OEM battery.

cproaudio said:
I notice that the 2800mah battery I got last only about the same as my DynaPack. I've only used it 3 days and have been charging it overnight every night. Are your extended battery last as long as it should. I mean like 2x the OEM battery.
Click to expand...
Click to collapse
I ordered a 2800 from ebay for cheap. It supposedly had the back plate. But they shipped a 2600, no backplate. So far battery life is equal to or marginally better than stock.
I'd reccomend sticking with the good brands and oem specs.

6000mAh external battery w/ solar charger for £15 !

I came across this on ebay: http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=170212826483
It's a solar charger with 6000mAh internal battery. Output voltage is 5.5V and output current 1A. For me it seems to be perfect for our Kaisers.
I doubt you would get even external battery with such capacity for this price (it's £20 including P+P to Slovakia). And this thing even charges itself "on its own".
I will be probably buying one in a few days, but I would like to know if anybody has any experience with or opinions about this (such) device. Please share.

In my understanding it's only a solar-charger not an extended battery.
It would be nice to get an extended battery included the solar charger for Kaiser.

It does have 6000mAh acumulator inside and it can be charged via (included) AC adapter. So in a sense - it is (and can be used as) external battery extender.

Yes, actually it is so, but then it's too heavy to carry.
My wish is to have an extended battery with solar charger on the back cover. I know its just a wish, but would be a nice accessory.

Oh, I see what you are up to. IMO that would be inpractical, since you would have to have your Kaiser laying top-side-up to charge. Something like this might come to your interest (if they would make it for Kaiser, that is): http://gpsforless.co.uk/product_details.php?id=12048 It's an iPhone case that has Solar panel on the front of it.

Yes, something like that. I don't feel unpractical until I can find a smooth surface to lay down kaiser on LCD panel. Before some Nokia model came with such solar panel, I think great solution.

omikr0n said:
Oh, I see what you are up to. IMO that would be inpractical, since you would have to have your Kaiser laying top-side-up to charge. Something like this might come to your interest (if they would make it for Kaiser, that is): http://gpsforless.co.uk/product_details.php?id=12048 It's an iPhone case that has Solar panel on the front of it.
Click to expand...
Click to collapse
just have an off topic question. What battery are u using now? If some extended, where did u buy it? I cant seem to find a store here in Slovakia that sells batteries for Kaiser.

I'm using Mugen Power 1500mAh.
I bought through Eten webshop
HLI-P4550SL Mugen Power 1500mAh Extended Battery For TYTN II (P4550) / HTC Kaiser 120, T-Mobile MmDA Vario III, Vodafone V1615, AT & T Tilt 8925 (Cingular)
http://forum.xda-developers.com/newreply.php?do=newreply&noquote=1&p=2144840

Sorry wrong link. The correct one:
http://shop.eten.hu/batteries-c-25.html?page=2&sort=3a

Mikulec said:
just have an off topic question. What battery are u using now? If some extended, where did u buy it? I cant seem to find a store here in Slovakia that sells batteries for Kaiser.
Click to expand...
Click to collapse
I currently use only OEM 1350mAh that came with my Kaiser. I have, however, bought this extended 2800mAh battery from ebay, which I am still waiting to arrive. I think ebay is the way to go for things like these - they are very expensive and hard to get in standard shops in Slovakia.
And I am very much considering the external battery w/ solar charger mentioned in my first post. I would use it especially for long (couple of days) bike trips that I will be doing. And £20 price for such thing is extremely good price

igkovacs said:
I'm using Mugen Power 1500mAh.
Click to expand...
Click to collapse
How does it work for you? Is there any noticable difference in battery life compared to OEM 1350mAh?

omikr0n said:
I currently use only OEM 1350mAh that came with my Kaiser. I have, however, bought this extended 2800mAh battery from ebay, which I am still waiting to arrive. I think ebay is the way to go for things like these - they are very expensive and hard to get in standard shops in Slovakia.
And I am very much considering the external battery w/ solar charger mentioned in my first post. I would use it especially for long (couple of days) bike trips that I will be doing. And £20 price for such thing is extremely good price
Click to expand...
Click to collapse
I was thinking about buying a new battery, but the fact that I will have to buy a new case also is stopping me from buying it. Give us a little feedback about the battery and also about the solar charger when u will get them. I am really curious.

Okay I will. I am not yet definitely decided if I will buy that solar charger, though.

omikr0n said:
How does it work for you? Is there any noticable difference in battery life compared to OEM 1350mAh?
Click to expand...
Click to collapse
Not really (may be 2hrs longer uptime), but I needed a spare battery as well. You also can buy 2000-3000mAh battery, those should be significantly longer uptime, but they come with a wider back-cover.

Okay, thanks for info.
@all:
I have just bought that 6000mAh solar charger. Will inform you in this thread, when I recieve it.

i too have recently ordered this, hope it is as good as it claims to be, or at least nearly as good, hope I don't have to wait too long for it to be shipped from Hong Kong

I have been astonished by its specification (and price), too. If it is going to be as good as it claims then the money spent will be surely worth it.

do you guys know if you can change the internal battery? for that price i skeptical about the quality of the 6000mah battery. can the solar panel charge the phone directly?

i don't know, i am waiting on delivery any time from 3 days til a week away from recieving it, will tell you all about it with pics if i get it before omikr0n

If the battery is totally dead, can it run the phone on solar power alone?

high capacity battery?? what vendor? what model? what capacity?

Hi everybody.
plz someone can help me to find a good battery in ebay for my kaiser?
I read about some batteries with high mA capacity but the same performance than the original battery, and some vendors and very bad quality batteries.
so I'm a little bit confused, I want a battery with better performance than the original, but with the same size (of preference) or not too big.
if someone can tell me about a good vendor and his best battery model I would be been thankful with him
PS: plz don't burn me by open this topic so vitiated.
Ps2: sorry about my english

I'm using this battery which is technically twice the capacity here:
http://www.superetrader.co.uk/htc-t...lacement-extended-battery-2700mah-p-3052.html
It comes with a new back casing because as you would expect it is literally twice the width of the original battery so it sticks out at the back. I haven't had any problem with the quality of the battery, but the casing does feel a little bit cheaper than the original.
This one comes with 12 months warranty, which you are unlikely to get on Ebay so bare that in mind when you do your purchase.
R

rfarnell said:
I'm using this battery which is technically twice the capacity here:
http://www.superetrader.co.uk/htc-t...lacement-extended-battery-2700mah-p-3052.html
Click to expand...
Click to collapse
Technically, yes...but in normal use, does it actually work? Does the battery work longer?

ive used an incredibly similar style of battery for an older htc phone. I used a battery with twice the mah but didnt quite get twice the life. dont get me wrong, did the job at increasing the life pretty well and u get used to it sticking out a bit on the back
ps, if yer using a tight carry case then it may not fit in with an upgraded battery

hknivers said:
Technically, yes...but in normal use, does it actually work? Does the battery work longer?
Click to expand...
Click to collapse
that is exactly my question. in this case, which battery is better in weight/size/mAh/performance?

Im using the 1600 mah from www.seidio.com. Barely adds any weight compaired to OEM. Batt life for me is extended about 4-5 hrs. On OEM, with normal usage, I am down to 30% by 10pm (I charge overnight 12am-5am). With the 1600, I am about 45% at 10pm.
All my products from Seidio have been solid. I would stray away from batteries bought from ebay. I got lame ones several times when buying batts for other phones, cameras and devices.

I forgot to add that the 1600 does not need the extended back cover. It is the same dimensions of the OEM. Also the 1600's weight is, if anything less then the OEM. The metal bars/frame on the OEM battery is not there on the 1600. Some say that the metal bars are for reception. So far I have not noticed any reception decrease nor interference difference.

transportguy said:
All my products from Seidio have been solid. I would stray away from batteries bought from ebay. I got lame ones several times when buying batts for other phones, cameras and devices.
Click to expand...
Click to collapse
I live in Chile (southamerica) in the ass of the world.
the only easy-fast way to buy something is ebay
I am so lucky I guess, I never had a problem buying this way always looking the vendor feedback/reputation.
thanks by the advice

I think the best battery is that http://shop.eten.hu/mugen-power-300...5-cingular-with-battery-door-black-p-207.html

breakx said:
I think the best battery is that http://shop.eten.hu/mugen-power-300...5-cingular-with-battery-door-black-p-207.html
Click to expand...
Click to collapse
Why do you think that? Have you compared it to the other extended batteries (including the cheap ones on eBay)? As far as I can see, they're all pretty much the same.
As far as I understand, all the extended batteries have the problem where the Kaiser incorrectly reports the capacity and shuts off when they're half full.
Have you seen this post? http://forum.xda-developers.com/showpost.php?p=2097942&postcount=48

FWIW:
We have few older htc phones at home (ipaqs, tytn1, tytn2).
I bought extended batteries for ipaqs in the past - original from HP's store, and 2600mAh and 2400mAh "generics" from ebay.
Contrary to what I've been "warned" by some people, there was no problems whatsoever with any of the "generic" batteries - they didn't explode didn't damage my phones, nor didn't malfunction prematurely either.
The 2600mAh made in China lasted me 1yr 3mths before it started to act up, the 2400mAh Taiwan-make still works (its been 1yr 5mths now) - and both are no-brand cheap batteries from ebay, and the HP's expensive extended batt (IIRC it is mere 1800mAh only) still works too (almost 2yrs now).
The only problem I had with the extended batteries were their replacement back covers.
Except for HP's original one (of course) which came with 2 extra covers, the "generics" came with really shoddy and crappy covers, the China-make one was the worst: it was slightly out-of-specs, and it always felt somewhat loose (no, it never felt off nor unlatched itself but it had this "loose" feeling always, you could physically feel it moving a bit up and down when holding the phone, not much - maybe half a millimeter - but it was there).
The other Taiwan make battery's cover was perfect in its dimensions (no "loose" feeling) but then its color was few shades off of the original color... not really important detail (specially when you pay 3x less than for the "original") but I thought I should mention it too.
I have just ordered Mugen extended battery for my TyTN II.
When it arrives - and I won't forget - I'll post here about it.

****, I am really confused now
thanks justdave by the advise.

just get a ebay cheapo
http://cgi.ebay.com/EXTENDED-LIFE-B...ryZ20336QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
this is what I ordered. from this seller. battery cover fits perfectly. no wiggle. battery lasts all day without worry with heavy usage. talk, email push, web, im on it all day.
It does not report the battery meters correctly as with all extended batteries as noted. but this battery at 23 bucks shipped is the so much cheaper and I am betting the exact same cells as a seidio or muggen battery. they are all made in china anyways.

An alternative may be an external USB power pack. I use one of these and top up when my battery is going low. Saves the hassle of a larger phone, and all i need is a standard mini usb cable
http://www.proporta.com/F02/PPF02P05.php?t_id=2725&t_mode=des

I am also using the seidio extended life 1600ma battery, i used to charge my phone every night because id be down to like 20% after a day of use, now with the 1600 i go 2 days of use and charge it the 2nd night almost always. Also you retain the original battery cover. I dont know about you guys but this phone is dookie enough as is, i dont need a big battery that requires a new cover and makes my phone another 1/4 inch thicker. seidios a good buy imo, little pricey but ive been happy with its performance.

Extended Batteries
I have an Electrospan by Boxwave @ 2600mah and a Mugen 3000mah. Yes, I think the Mugen might be a little better, but what is interesting is the batteries are exactly the same size although the back covers are different. They do make the device thicker, but it still fits in most horizontal leather cases I have tried. Boxwave also sells an external battery pack that takes 4 AA batteries. The key is to minimize battery drain in the first place. If your data like connects to 3G, battery life goes away quickly vs. edge or GPRS. You can restrict this by using Bandswitch # www.commmgrpro.com (10 euros). Voice calls, screen brightness and push email can also contribute significantly to drain.