Re: Mugen Power Batteries
 

Yes, you are completely mistaken, in my brief experience.

1. The battery seems to last forever.

2. I use an external battery charger, so I don't know whether the N900 detects the design properly or not or whether that affects the charging. The external battery charger cost me $10 a few months ago.

3. The battery and the cover seem well made. There is no cover for the camera and the external SD card doesn't work, but Mugen may well provide a fix.

Re: Mugen Power Batteries
 

I added now later, that although the battery charge level bars dropped from 8 to 1, the battery had been in use 25 hours after the last full charge. I was wondering in the morning already why the charge bars still show 8 although it had been so long after last charging.

So either Mugen has wrong logic in the battery, and it doesn't report the charge level (mAh) correctly, or then there is a hw/software bug in N900.

Anyway, ...well I still wait for a fix for the microSD-card, but battery has improved usability alot because if I have charged battery in the night, I can do about anything (except maybe not play Quake Arena 10 hours) during the day with N900 and the battery will have juice still.
I think Nokia should themselves provide 2400 mAh battery. This seems like a right size for the heavy user.

I won't recommend this 2400 mAh battery yet though, before they prove they have a back cover which makes both microSD-card and camera work OK.
I find it little odd, they do not tell about the microSD-card problem on the web-page.

Re: Mugen Power Batteries
 

yes, I thought it was kind of mind-blowing that I didn't at least get some instructions mentioning that the camera could use some protection. I suspect that Mugen didn't try it with a microsd card, which would explain why they didn't mention it!

In the last analysis, they probably made a mistake even offering this battery. But I sorta like mine, despite the defects.

Re: Mugen Power Batteries
 

There's no logic in the battery. There's just one resistor or NTC.
I was pretty sure that was an NTC to monitor the battery's temperature and prevent charging if it gets hot. But I could be wrong -- looking around a bit turns up references to both roles, and if it actually is a resistor to specify size, it would explain the wierdness.

Re: Mugen Power Batteries
 

I thought Mugen is powering HONDA Vtech Engine :D

Re: Mugen Power Batteries
 

Well, it's the next day and I'm still waiting for my Mugen to lose enough power for me to recharge it! Maybe it really does last forever! It certainly is nice to be fretting that the battery lasts too long for a change. This aspect of the new battery I like very much.

Re: Mugen Power Batteries
 

I just got a message from Mugen saying they are working on a solution to the Microsd problem and will send a replacement cover as soon as it is ready.

Re: Mugen Power Batteries
 

I measured the Battery Size Indicator pin with a dmm, and comparing it with BL-5C, BP-4L and BL-5J does make it look like it's properly reporting the bigger capacity.

Re: Mugen Power Batteries
 

Maybe someone with one of these batteries should file a bug in https://bugs.maemo.org/. Probably too late for PR1.2 though.

Re: Mugen Power Batteries
 

I found out that after taking a Mugen battery off and then inserting it and booting seems to fix the battery level indicator. But then rebooting again without removing the battery, makes the level indicators "broken" again.

Re: Mugen Power Batteries
 

I think the N900 recalibrates the battery sensors on boot - presumably the settings are specific to the standard battery.

Re: Mugen Power Batteries
 

Re: Mugen Power Batteries
 

So you measured resistance between what and what pins?
What is the formula to convert the resistance then to capacity of the battery, do you know?

Re: Mugen Power Batteries
 

Between GND and the third (unmarked) pin. I don't know the formula.

EDIT:

Seems like there's a design flaw in the mugen battery. The resistance on BSI-GND varies according to battery temperature. Thus the reported design capacity varies depending on how warm the battery is.

Edit:

Sent an email to mugen about it..

Re: Mugen Power Batteries
 

i just get 1 more bl-5j battery and an external charger.

that way, plugging my n900 on a wall charger is minimal, and i dont have to wait for 2 hours before can use my n900 if charging

Re: Mugen Power Batteries
 

Well you can use your N900 while charging as long as you've got a sufficiently long cable :) You don't need to charge it full once you start charging either, you can interrupt and resume the charging whenever you want.

Re: Mugen Power Batteries
 

that's right! and you dont have to turn your phone off

Re: Mugen Power Batteries
 

You're mistaken, they tune and power anything that's Honda :)

Re: Mugen Power Batteries
 

1st charge: 2,5 days of battery life (many hours of web surfing)
2nd charge: 6 days of battery life (every day use - some web surfing, checking for updates, pim/agenda)

Re: Mugen Power Batteries
 

FYI I've hacked my Mugen back cover with white sticky tape (where there should be the white spot that signals the lens cover is open) and a piece of a fridge magnet in the place of the original cover magnet. It wasn't difficult, the only point is to find a magnet powerful enough.

Mugen says they'll send two working covers when they are ready; in the meantime, my hacked one works :)

Re: Mugen Power Batteries
 

theyre sending TWO covers?? Nice!

Re: Mugen Power Batteries
 

OMG!!

The one who coocked up this rediculous bulky idea wasn't paying attention to the n900 design at all!

1) The N900 has an active back cover. It's one of the first things I noticed while i was exploring the device when I got home with it.

2) What kind of pictures/movies are you expecting to get when the backcover is lifted to create hiding space for that bulky brick called "power battery" My guess is that the flashlight will simply be reflected by the backcover messing up all your pics.

3) The N900 is allready big enough as it is, unless you're planning to strapping on to your back cuz now it wont fit in any pocket!


btw...those nails!! :eek:
I really would like know how many ladies own a N900 and also have those kind of nails. I guess not that many.


This topic is a fun read and I'm certainly not even considering this battery-pack for a nanosecond.
Untill there is a same sized, balanced, higher capacity battery designed to meet the specs of the N900...I'll pack my charger instead, and maybe even buy an extra OEM battery.

greetz,

TylerD

Re: Mugen Power Batteries
 

Do you really believe in that? :D

Re: Mugen Power Batteries
 

me.......? no.

Re: Mugen Power Batteries
 

The back cover seems to interfere less with the camera than the original

Re: Mugen Power Batteries
 

like duh! offcourse not... that's why i said i'll be packing my charger instead :p

Re: Mugen Power Batteries
 

Working fine here --perhaps the difference would be perceptible in head-to-head comparisons. But it's black, and angled away, such that it really reflects very little light back into the lens. I'm not at all sure it's even worse than stock, with that lovely chrome around the lens...

Well, phones don't really belong in pockets -- pockets are shapeless bags made to hold random things, or loose objects that need containment. They generally result in excessive wear from everything in them rattling together. If you're going to carry a single item every day, doesn't it make sense to use a belt holster that fits it just right? No scratching, you always know exactly where to reach for it, no getting snagged against other objects...

But since I have yet to find a holster just right for my N900 with extended back, it's been riding in my front pocket quite comfortably. Maybe it's because I wear pants that fit freely enough for actual living.

Re: Mugen Power Batteries
 

My answer to the thick/heavy phone problems?

http://www.hardcloud.com/uploads/pro...511175br_m.jpg

Cargos 4 life. :)

See, unlike my metrose--- fashionable friends who buy their phones to suit their attire, I buy clothes to match my phone. :p

Re: Mugen Power Batteries
 

nightfire, I somewhat agree, I recently got a pair of pants that has a cell pocket that's PERFECT for the N900 (with a stock battery). Haven't gotten a Mugen yet to test, but depending how the battery holds up after overclocking with my typical usage (GV open in Conversations all day potentially tethered to my Storm) I may have to get a Mugen yet (and hope like heck it fits).

Re: Mugen Power Batteries
 

Lol, was thinking the same! Though it seemed as if they were the perfect length to open the back cover...

Re: Mugen Power Batteries
 

lol i think i'm the only person i know who still wears skater jeans for this reason.. tho i have been known to crack out the man bag every now and again..
always think those crumpler holsters look intersting too..

Re: Mugen Power Batteries
 

is there any update on the fixed back covers?

Re: Mugen Power Batteries
 

Yeah I was impressed when they told me that. Great customer service!

Hopefully they'll arrive soon.

Re: Mugen Power Batteries
 

In case I haven't mentioned it already, in my tests this battery measures up very close to 2400mAh, measured from the shutdown threshold to full battery.

It'a so refreshing to see someone make a battery labeled and marketed with its real capacity!

Re: Mugen Power Batteries
 

Yes, I've noticed also, the capacity IS what is promised.
It was better to be also, for that price.
Mugen Power company isn't just some NO NAME company, so I felt pretty secure when making the order then. They have been in Formula F1 industry before also.

The design bugs are a misfortune though. The back cover design flaw is probably cheap to correct, just plastic; but the wrong type of resistor inside the battery is a different thing.
I haven't got any info are they planning to fix that issue or not. A new (or two) back cover won't fix it. There could be also a software fix, but that needs Nokia as BME is closed source.

Re: Mugen Power Batteries
 

Presumably that is not a bug - you'd think Mugen would know about that kind of technical feature as it's hardly the first time it's been used to determine capacity in a mobile battery. If it's news to Mugen, after all these years in business, then that would come as a suprise.

On the other hand you can excuse them for the lack of a magnet and white reflector as these features are somewhat unique to the N900, although a modicum of investigation would have revealed their existence/purpose. I still can't help thinking this product has just been cobbled together though.

Re: Mugen Power Batteries
 

When I get the time I plan to test at which temperature you need to boot n900 for bme battery measurements to become useful :)

Re: Mugen Power Batteries
 

Dude, I'd love to find cargo pants in my size! I love them! Even cargo shorts would rock too. Especially since I've got several large 1+ lb batteries I periodically need to carry with me.

Re: Mugen Power Batteries
 

Has anyone received an updated rear cover yet? I'm contemplating ordering one of these but I don't want to have to mod a bad cover.

Re: Mugen Power Batteries
 

I haven't received mine yet.

Are they fixing the lack of sliding camera lens cover?