Momax EXPower 2700mAh Battery
- Thread starter iridaki
- Start date
batwingnz
Senior Member
Sweet as, I'll unpack kernel I'm using and stick my grubby fingers in it to see what happens. disclaimer: never tried anything similar before.
Sent from my LT18i using xda premium
Sent from my LT18i using xda premium
batwingnz
Senior Member
I got an Arc S and with the ExPower 2700mah battery too, Using DooMKernel with MIUI ROM, the battery reading is really annoying me, tried reboot but still it didn't give the correct battery reading, I can use the phone for hours at 1% batt
Maybe try pulling the battery instead of rebooting the phone.
iR¡D@k!* via Tapatalk 2
batwingnz
Senior Member
Pulling the battery doesn't fix that, but it is necessary in order to charge the battery. If it gets flat and you plug in charger it will say its charging but it isn't until you pull the battery.
Difficult to use/recharge as sometimes even at 14% pluggin in it keeps discharging then dies, but if i pull it out then plug it in and reboot the phone i can charge it.
Verdict: basically unusable but that first few days was sweet as with a massive charge but now its difficult to confirm its actually charging.
Difficult to use/recharge as sometimes even at 14% pluggin in it keeps discharging then dies, but if i pull it out then plug it in and reboot the phone i can charge it.
Verdict: basically unusable but that first few days was sweet as with a massive charge but now its difficult to confirm its actually charging.
I haven't encountered any of the issues you mention, at least for now.
The battery can go on for approximately 2 days and it is the perfect backup battery for me. It is annoying that it can stay @1% for hours, but all in all, I can't complain. Are you charging via AC or USB?
batwingnz
Senior Member
Both ac and usb. I'm sure I'll work it out, failed on the kernel front btw, didn't boot after recompile. Not going to try again though .
Sent from my LT18i using xda premium
. Sent from my LT18i using xda premium
batwingnz
Senior Member
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8Hello!
I bought this battery from eBay and it just arrived.
I know the first thing that anybody wants to know when they hears "extended battery" is how it looks...
So, here are some pictures
(YES, they are shot with an iPhone 4 and the phone is on an iPad... My brother has bitten the forbidden fruit!)
7/3/2012 UPDATE:
OK, after almost a full week with it, here are my observations:
1. The battery is indeed of extended capacity and the cells appear to hold the charge better than stock battery so far. I do not have the equipment to confirm that it is 2700 mAh as it is claimed, but there is no doubt that it is almost twice as lasting as stock battery.
I've been in between changing ROMs at this point, but I will upload screenshots of Battery Usage in the coming days. I've been able to stay away from charger for more than 50 hours, which is an immense improvement over stock battery.
2. Battery cover is of OK quality, feels a bit loose at times, but it is not falling out of its place. Of course, I haven't dropped the phone, so I can't guarantee on the durability. Certainly sub-par to OEM battery cover, but not bad either.
The kickstand is purely awesome! Phone stands on a perfect angle. I am concerned about its durability too though.
3. Here comes the tricky part:
The phone seems to be unable to display accurate readings of the battery.
It drains from 100% to 1% approximately the same way stock does and then I have to pull it an re-insert it and when the phone boots it displays 65%. Same way, every time it hits 1%, I have to do the same and the percentage rises.
I looked into /sys/class/power_supply and found a folder called semc_battery_data. I searched further and realised that the capacity (1500) and type (Li-Pol) are actually hardcoded on kernel level. HTC developers have already addressed similar issues on kernel level.
I talked to Bazoocase (the developer of the 0% battery issue work-around, so pretty much the expert on the Arc battery gauge!)
about it and he confirmed that this is really the case:
Bazoocaze said:
He was kind enough to prepare a test kernel for me, with increased battery capacity, from 1500 to 2700, and I am testing it right now.
____________________
All in all, my personal opinion is that this battery is long-lasting and reliable, a huge improvement over stock.
Whoever wants the extra juice and is ready to compromise the thinness of the Arc, could go for it.
I will certainly keep using it, as it has freed me from the "looking for a power plug" plaque.
Even if the kernel patch turns out not to be working, inaccurate readings are not an issue, at least for me,
when I can safely go through the day without charging and can reach up to 2 days of battery life.
As far as my usage goes, I could get 18-20 hours average from stock battery, which is not bad at all,
since the easiest thing to do is plug your phone before you go to bed. However, I do appreciate not necessarily having to do that too.
I will keep this thread updated should I have further findings.
iR¡D@k!*™ via Tapatalk Pro6OK, after almost a full week with it, here are my observations:
1. The battery is indeed of extended capacity and the cells appear to hold the charge better than stock battery so far. I do not have the equipment to confirm that it is 2700 mAh as it is claimed, but there is no doubt that it is almost twice as lasting as stock battery.
I've been in between changing ROMs at this point, but I will upload screenshots of Battery Usage in the coming days. I've been able to stay away from charger for more than 50 hours, which is an immense improvement over stock battery.
2. Battery cover is of OK quality, feels a bit loose at times, but it is not falling out of its place. Of course, I haven't dropped the phone, so I can't guarantee on the durability. Certainly sub-par to OEM battery cover, but not bad either.
The kickstand is purely awesome! Phone stands on a perfect angle. I am concerned about its durability too though.
3. Here comes the tricky part:
The phone seems to be unable to display accurate readings of the battery.
It drains from 100% to 1% approximately the same way stock does and then I have to pull it an re-insert it and when the phone boots it displays 65%. Same way, every time it hits 1%, I have to do the same and the percentage rises.
I looked into /sys/class/power_supply and found a folder called semc_battery_data. I searched further and realised that the capacity (1500) and type (Li-Pol) are actually hardcoded on kernel level. HTC developers have already addressed similar issues on kernel level.
I talked to Bazoocase (the developer of the 0% battery issue work-around, so pretty much the expert on the Arc battery gauge!)
about it and he confirmed that this is really the case:
Bazoocaze said:
He was kind enough to prepare a test kernel for me, with increased battery capacity, from 1500 to 2700, and I am testing it right now.
____________________
All in all, my personal opinion is that this battery is long-lasting and reliable, a huge improvement over stock.
Whoever wants the extra juice and is ready to compromise the thinness of the Arc, could go for it.
I will certainly keep using it, as it has freed me from the "looking for a power plug" plaque.
Even if the kernel patch turns out not to be working, inaccurate readings are not an issue, at least for me,
when I can safely go through the day without charging and can reach up to 2 days of battery life.
As far as my usage goes, I could get 18-20 hours average from stock battery, which is not bad at all,
since the easiest thing to do is plug your phone before you go to bed. However, I do appreciate not necessarily having to do that too.
I will keep this thread updated should I have further findings.2
Yes, it is not slippery anymore in fact!
I am going to make a video, should be more indicative than pictures.
When it arrived, it had 8% battery in it, I drained it and that took approximately 6 hours (5 hours screen on, music, youtube, browsing, emails).
I plugged it in overnight and today when I woke up, took the phone off charger. It's been 3 hours and still @99%.
So far seems really good, but to be honest, I have to monitor battery life for 2-3 cycles before I can tell if it's that good.
I'll keep you posted.1its not an Arc anymore <whers the sexiest of our Phone
It certainly deprives the Arc of its slimness but it doesn't look half as bad as I thought it would!1
No works fine with the stock back cover that was the most important thing while considering secondary battery.
