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LION Battery - Batteries with Power to Spare











Interestingly enough, the folks at LION Battery recognized that the design was flawed and have begun selling Mugen Power batteries that completely fill the back of the extended cover. This is a 3.7-volt battery that is rated at 4500mAh.

When I saw this battery, I had to try it and see if there was an appreciable difference --- well, there is and it is significant! I have never been in a situation where I felt totally comfortable with the amount of time I have on my iPAQ, that is, until now.

When my battery came, I was impressed with two things right away. First, as I took it from the package, its weight was significantly different than the HP extended battery I had. It was enough of a difference that I just knew that I had POWER TO SPARE. Secondly, the design was impressive. By that, it had the same features of the HP extended battery so it looked like it was made for the device but noticeably the void space was not VOID --- they filled it! That means there was more power --- this was good!

Inserting it in my iPAQ, I had to go through the routine of a soft reset but then I was up and running. The battery had power in it but I wanted to charge it, get it up to full power then give it a go. It took a while to charge but all of a sudden the charge light was no longer blinking so I removed my iPAQ from the charger and began to use it.

To get my iPAQ used to the battery, I used it several days allowing the charge to drain and then recharge several times. I was impressed with the amount of time that was displayed on the battery meter (9:24) but I was certainly aware that the amount of time displayed was an estimated usage that the iPAQ determined. Considering that I am not an engineer nor do I purport that I know anything about battery power, I felt that the best way for me to determine the amount of time available was to just use it and report the results of my experience. So this is what I did...

Initially I just used my iPAQ as I normally would --- a couple of hours a day running a few basic programs, playing a game or two and surfing the net. There was drain on my Spb battery meter but not significant. Each night I would recharge as was my normal custom but I started to realize that I did not need to do that. There was ample power remaining to get to and through the next day. Whether it was a conscious or sub-conscious move, I was clearly using my iPAQ more each day but I kept an eye on the battery meter. There never seemed to be significant drops in the amount of power remaining.

Then there were a couple of days that for the first time, I did not plug my iPAQ into the charger because my comfort level was starting to increase. Normal activity started to change as I added more and more time to my WiFi web work. No longer was I afraid that I would run out of power which meant that I started to do more and more on a daily basis.

To see what the potential was with this battery, I played three full-length videos one after another at one sitting (I can not imagine ever watching more than three at a time). Total time was slightly more than 6 hours, in full screen landscape mode with the volume set at its highest setting and screen brightness set just slightly below maximum brightness. At the end of the third movie, I still had in excess of 35% power remaining. Hmmm...I was impressed!

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I'm not sure which forum is appropriate for this topic, but today, as I was travelling on a 6 hour trip, I took a spare Li-ION battery (3.7, 1800mah) with me. I changed it out in the morning and when I went to turn on my unit, it had WIPED ITSELF CLEAN!!!! My internal "backup" battery read 100% when I switched out. HOW ARE YOU SUPPOSED TO SWITCH BATTERIES WITHOUT LOSING ALL YOUR SETTINGS/DATA. THANK GOD I HAD A BACKUP FROM HOURS BEFORE I MADE THE SWITCH! Otherwise, yikes! I have dozens of various software I've installed over the past months, which would be HELL to reinstall!

Any hints or other threads you'd recommend on this. I have a 4700, btw.
I just purchased an extended battery for my 4155. The wording of Dave's article made me think the 2000mAh battery was standard dimensions. It's not. If you get these bigger batteries, realize your unit won't be thin anymore and won't fit in your metal cases anymore.
I'm having a hard time finding a decent case now.
Correction to my 5/19 post: My last post made it look like it is Mugen's issue with the 1.10.08 ROM--NOT TRUE AT ALL. After much research and testing it has been found that ALL bateries are affected-the stock 1800mah one, the HP 3600mah one and the 4500mah Mugen.

That power drain/reporting issue *is not* Mugen's issue--it is definitely HP's issue and can be reversed by reloading the 1.00.09 ROM. This is confirmed with Mugen and Lionbattery. I have purchased two of these batteries and know them to be awesome as such.
Watch out! This batery is awesome under the 1.oo ROM. 9 hours of run-time! BUT I am having problem with the usable capacity of this battery under the new 1.10.08 hx4700 ROM upgrade. I get about 50-60% of the run-time capacity after the upgrade (4.5 hours of run-time versus 8 to 8.5 hours before!) If anyone else is having this problem, contact HP and myself so we can get it fixed with HP in a patch...
From the reviews of the Mugen products, I too, was convinced. My 4700 is now sporting one of their 4500 mAh batteries. Had to get a Sena case for the extended battery, but it was worth every cent.
Thanks for the article. Interesting. I bought one of the HP extended batteries for my 2750 and it came with a charger and back. The Lion product for the 2750 doesn't include a charger but is substantially lower in price AND I noted that the HP product is rated at 2330mAH and the Lion model is rated at 3200mAH. FWIW
I cannot recommend these batteries enough. I carry the iPaq 4155. I purchased a 2000mAh LION Battery several months ago. It fundamentally changed the way in which I use my iPaq. I never even think about whether I have enough power any more. My iPaq still fits in the stock case too. I cannot imagine having a 4500mAh battery. WOW!
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