does anyone here have a multimeter that they can read their BA's battery with?
4 of my BA batterys are reading 0.00. and yet, they're 90% charged. then i have one thats reading .02, which is about fitting with its chargelevel.
what do yours's read=
Related
Hi
has anyone ever tried out AA battery charger for O2 Exec, Qtek 9000,HTC Universal ?
I cannot imagine how this could possibly work with just one AA battery.
Same question for AA Battery Extender Charger
(If this has been asked/posted around, please point me to. I couldn't find it)
I personally have a 2x AA charger I bought in Japan. Does mini-USB.
Um, I can't say for certain, but it did charge my Dopod 900 from 18% to 20%, at which point the thingie broke down and stopped charging and instead did a rapid discharge on my phone... bringing it down to 11% before I pulled it out.
It doesn't seem to charge unless the phone is off beforehand, as well, as noted in a Motorola-charger thread somewhere else.
I tested it with the alkaline batteries that were provided with it; your mileage might vary with rechargeable lithium-ions. I'm going to try 2x 2000mAh ones when I get back to Singapore and scrounge up a bit of change; I'll report back then.
One of the pictures seems to put the USB charger in the wrong place.
Is there a Universal with the charger at the SD Card area or is it at the side?
Full voltage (100%) is around 4.2V, so charging the Universal I expect higher voltage, isn't it not correct?
1 normal battery is usually 1.5V and rechargable type is 1.2V. Seems like need 4 batteries?
Is there a protection circuit for over charging?
Mmmm, perhaps I can help here.
Premise, I haven't test any of the chargers you mention (but they seem interesting to me).
I'm not 100% certain of this, but, I'm quite sure that there's no universal with the charge bay near the SD; this is just a simple graphic error surely made by the Ebay user that place the ad togheter, most PDAs have their power in around there!
CWKJ is absolutely right when He says that battery voltage is 4.2V, now, if you were going to charge the universal "directly" battery to battery (this is not the way rechargeable batteries are charged), you would need at least the same voltage that has the battery to be charged (this is 4.2V).
Battery chargers are "a little bit more complicated", each battery technology requires some kind of "different" battery charger (Acid like Lead batteries used in cars or UPSs, NiCd, NiMh, LiPoly, LiIon, etc.).
Some chargers verify the battery's voltage, others battery's current, others battery's temperature, others several of them, others a special mix of changes related to several of these parameters, and so forth.
The chargers you're talking about in this thread are contructed with a special switch mode power supply, the type that boosts (raises) the input voltage, they'll work as long as the "donor" battery has enough power (expressed in W or A*V). Also this power supply has a "efficiency" (expressed in %), so not all the energy is tranferred to the charging battery.
It depends on charger's quality how well will it work and how much will it last, the situation mentioned by linj seems like a defective charger to me.
One last thing, usually these boost converters have been made with over current and over protection circuits, and I'm saying usually, because one of my car chargers burnt itself out without any reasonable cause but a defective/poor design.
See the price that you're buying and you'll (not neccessarily) end with a good approach to the charger's quality.
With such cheap price, I would expect it to be direct to direct charging and not completed Switch Mode Power Supply charging.
For the first one mentioned by JumpinS (the cheapest), the converter seems to be present, there's a detailed photo where some components can be seen, including a little inductor that's absolutely necessary to make the converter.
The other one has no such photos but being expensivier...
As soon as the battery meter shows 74% the device shuts down and will only restart if powered via the USB port. Once the battery is re-charged to 100% the device works fine again until 74%. I assume somewhere there is a setting for the battery threshold voltage.
(Same with a new battery)
Can anyone help?
Regards
Paul Holt
This question has been asked many times in many threads.
If you have no time to read, here is what most concluded,
"Buy a new battery."
Preferbly original battery. (my comments)
Universal Battery Probs
Thanks for your advice.
I have tried a new battery - Not genuine HTC
I will buy a genuine new battery
I had similar problem. I bought directly from the HTC shop the big battery. Now I have enough power for a week or so
duracell batteries for JasJar?
Pholt,
How long have you been using your universal?
my jasjar's battery had the same problems after 6 months of use.
does anyone have any ideas about bigger batteries?
cheers.
Jim
I think your batt is degrade
Hi guys, I i'm Uni user who own two batteries, both standard 1620 Dynapack batteries. One of them came with the device as I bought it used. One of them I bought I on ebay, both of show different kind of problems, first on dies when 38% battery left and second one shows bizarre power meter and dies with unknown indication of power left.
For both of these batteries, I charge them with a wall charger which originally for my HTC Hermes aka Cigular 8525. The output I read was 5V and I just found on the Uni batteries it says charging voltage limited under 4.2V
So I'm wondering could the wall charger being the reason for damaging my batteries as it charged them over a higher voltage so they act funny? If so where could I buy a Wall charger for HTC Uni?
Thanks guys~
Hi,
The first battery shows the normal signs of an old Uni battery. The same happend to most people here.
The seocnd battery is a cheap copy, which does not implement the same functionality as the original one.
The charger will show a slightly higher voltage, when measured directly with a multimeter, because it is not providing any current. Normally the voltage will drop as soon as an appliance is connected to it.
So far, everything seems normal.
To get an idea: I bought two Universal standard batteries at eBay, with one month delay (I have two Universals). The first one is much better than the second one, because it will retain power on standby much longer and seems to have a bigger capacity.
Still, the second one features a more impressive label...
I bought them from different sellers: I had to buy a battery for a friend and thought I better use the free shipping. Now I know I should have bought the second battery from the first seller - never change a winning horse!
Cheers,
vma
Also as Universal is an old device I´m not sure that bateries still being made to this date, so perhaps a "new" battery is not really new, as perhaps it is on storage from seller since long time. Just consider that
Dukenukem sold me the original Universal battery and he´s reliable seller
I am looking for an app our another way to test the mah rating of my battery. Its an extended battery I got from ebay. I have seen the battery boss page but my battery isn't on it. I have a volt meter and a lipo battery charger If that could be useful. This battery seems more like 2000mah instead of the 3000mah its advertised as.
im looking for some myself
i've heard people talk of r/c chargers and the like, but have yet to come across some to display the info these guys are talking about... i.e. like having an lcd on the charger to display how many cycles, and how many mah are put back in, etc etc
I just today afternoon recieved this universal charger, and till at end my first charging SGS3 original battery. And tonight or tomorrow will charge battery from my SGS1.
Will back soon opinion about my experience with battery life, after this way charging battery...
http://www.soshine.com.cn/a42.aspx
Regards
First experiment with original SGS1 battery (1500mAh) have went exellent, about 3 hours. First, no more, rapid fall battery life from 100% to 95% in first half hour, like if charging on GSM device direct. Think, maybe this universal charger have battery calibrator in
Regards
Yesterday i was charging my strongest battery for our SGS III, and im little confused. Baterry is capacity 4300 mAh, and from empty to 100 % was charging about 5 hours. Im not electronic expert, and i havent so much knoweledge, but confuse me, after full charging capacity battery is 2939 mAh on 4.2 V. Is it correct for this battery with capacity 4300 mAh, or something is wrong ?
Im asking from somebody battery expert or wit more knoweledge, if can explain me. Foto is attached.
Forwarding thanks on any answer or sugestion.
Regards
Nobody? No one?
well, lately you can buy a 10,000 mah battery pack that has 2 usb ports (one at 1a and the other at 2a) for under 50 bucks.
For the most part, not alot of people spend too much time removing and replacing batteries during the day and if they do, i've seen people with docks that charge up both the battery and phone at the same time.
mputtr said:
well, lately you can buy a 10,000 mah battery pack that has 2 usb ports (one at 1a and the other at 2a) for under 50 bucks.
For the most part, not alot of people spend too much time removing and replacing batteries during the day and if they do, i've seen people with docks that charge up both the battery and phone at the same time.
Click to expand...
Click to collapse
Ok, thanks, but some answer on my question in my last post about capacity battery and charging ? Know you some about this ?
Regards
Sorry. I'm no expert in electronics as well.
Sent from my GT-I9300 using xda app-developers app