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The li-on battery doesn't work i have tried chargig it but it still does not work

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That might mean that the battery is soggy or collapsed. It may appear charged but in fact is not. The battery needs to be replaces 2 years of life if used correctly is about the right span of life .

Posted on Jul 28, 2009

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Posted on Jan 02, 2017

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UDS655 monitor is out. Will not recognize AC Or PC. It must be totally discharged and the Lithium battery is gone


If you can not charge device's battery in any standard manner, the only way you have is to try to charge is manually.

Extract battery and check voltage between + an - terminals using some multimeter or just voltmeter device...

Normal Li-Ion (really Li-Polimer!) battery bank have nominal 3.6V to 3.8V and its voltage should be between from 3.2-3.6 to 4.2-4.3V (depending on model's nominal) to work and 2.5V to 4.3V to be on the safe side. All the good original Li-Po batteries have an internal controller board which prevents overheat and overcharge of the battery preventing it from leak, explosion and flaming. It's important and safety related. Also good controllers prevent overdischarge lower then 2.5V and close circuit to prevent later consumption. Closed battery shows 0V on the terminals, while may have remaining voltage on the battery bank itself, allowing to power controller board. Some controller will not close, so voltage may remain to fall tiil 0V, then the battery controller could switch off due to the power loss staying opened or closed to the external world.

Some devices refuse to charge overcharged battery 'slightly pushing' you to buy a new battery or a new whole device for a bunch of bucks, while making user 'guilty' for overdischarging. There should be the way to catch the developers of that devices and 'slightly beat' them with a 'small stick' to prevent future 'misunderstanding'. :)

I don't know which particular voltage is critical for your device nor battery, nor know whether device does correctly trying to charge overdischarged battery. So, while device wouldn't start charging the battery itself, the only way to understand what happened and do the right thing to fix is to check voltage and try to charge the battery manually till the level, device will detect it and fully charge itself.

If your battery shows some voltage higher then 2.5V it seems the device simply do not want to work (charge) in a reasonable manner.
Provide 4-5V power supply to the battery terminals (Check PSU voltage by your multimeter before trying to be on the safe side!). You should be careful and definitely obey polarity requirements, connecting PSU + to the battery + and PSU - to the battery -
Failing to do so may result in battery and/or PSU damage.

You need to hold powered contacts for a 10-20 seconds, then check battery voltage again. It should rise. Repeat procedure (if needed) till the battery voltage will reach 3 - 3.6V. Then install the battery to the device and try to standard full charge in the device. If your device refuses to start charging battery that shows 3.6V it seems to be the device itself failure.

DO NOT TRY TO CHARGE LI-ION/LI-PO BATTERIES WITH PSU RATED HIGHER THEN 5-6V. YOU MAY DAMAGE BATTERY CONTROLLER!
DO NOT TRY TO FULLY CHARGE YOUR LI-ION/LI-PO BATTERIES USING STANDARD 5V+ PSU. THIS MAY LEAD TO THE LEAK AND/OR EXPLOSION DUE TO OVERCHARGE!
Maximum charge voltage is about 4.3V. Charging till 4.4V will most probably will be dangerous and critical at least for battery itself!
Voltage accuracy is critical here so let the device to fully charge battery as designed or use suitable dedicated Li-Ion battery charger.

Some batteries may not start charging due to the internal controller logic, e.g. controller closed for charge or closed due to the power loss when bank is totally overdischarged. There could be some service terminal on the battery covered by sticker. It may lead directly to the bank -, while bank + usually directly connected to the battery +. In this case you can measure voltage and have the full access to the bank directly so may try to directly charge the bank. Anyway you can disassemble the battery and try to check and charge bank directly via bank's own terminals. Be careful while battery disassembly.

7.4V, 10.8V, etc. Li-Ion (Li-Polymer) batteries have a few banks inside, connected as serial to rise the nominal voltage. To charge them you should use suitable 8, 10. etc PSU or dedicated charger or disassemble the battery and charge each bank separately.

Do not short circuit bank terminals strictly obey polarity and strictly avoid damaging bank itself with some sharp tools! (It is NOT easy to damage hard aluminium case) If you have failed with this some way and you battery started to quickly heat and inflate drop it immediately to some heat resisting surface. DO NOT TRY TO DROP DAMAGED LI-ION BATTERY INTO THE WATER, NOR FLOOD IT WITH WATER IN ANY CASE! IT WILL LEAD TO / RISE EXPLOSION AND FLAMING!

Please note, while LI-ION/LI-PO batteries my explode or leak this occurs very rare and the battery (bank) will not explode in your hands unexpectedly unless you will not try to do something especially stupld, like connecting it directly to the 110/220V outlet. It will heat and inflate for a period of time then safety valve may burst. When the battery will exhaust its energy in a few minutes it will start to cool. Bank most probably will be totally damaged, however may remain some capacity. Excessive gas may be deflated through the hole made with a needle (very careful), then hole should be definitely covered by sticker (scotch) to avoid air/gas or water exchange with bank internals. Overdischarged battery may not heat and leak by physics, simply because it has very small energy charge insufficient for heating, unless you will charge it enough.

Think with your brain and make the right things!

Nov 03, 2017 | The Computers & Internet

Tip

How To Save Battery When Using Your iPhone 4s


The iPhone battery received the most troubleshooting requests by a wide amount during FixYa's FixMas report last year, accounting for 40% of user issues. With the newly released iOS 5.0.1 failing to fix the issue for many iPhone owners struggling with battery life, I figured it would be a good idea to break down some of the best ways to get battery life out of your phone.

The vast majority of these actions take place in the "Settings" section of the iPhone. They should be done in conjunction with one another in order to maximize battery saving effects:

  • Turn off location services
  • Turn off push notifications
  • Turn down screen brightness
  • Turn off Bluetooth and turn off auto-search for Wifi
  • Do not leave your phone charging overnight-- when your phone reaches 100% battery power, take it off the charger
  • Lock your phone regularly and enable auto lock (the shorter it takes for your screen to lock the better)
  • Fetch new data manually (emails especially)
  • Turn off Siri (4s users only)
  • Turn off time zone settings

Please keep in mind the historical issues of this phone when attempting to solve your battery issues-- while the phone itself is a work of art and functions wonderfully, the battery is a huge issue and something that will be a problem for you even after you implement these fixes into your daily routine.

In other words, these tips are merely a way to get more juice out of your phone throughout the day. They will not fix your battery issues outright.

That is something only an OS update from Apple will be able to accomplish.

on Jan 23, 2012 | Apple Computers & Internet

1 Answer

The usb for charging but it is not charging.


are you using the charger that came with the phone? I ask because I've run into in the past that if you try and use a different charger it may not work on your phone. you should use the one that came with the phone. having said that, you might want to try a different usb charger if that doesn't work it's probably the battery. Li-Ion batteries have charging circuits built in that can fail and also prevent the battery from charging if it's gone bad.

Nov 09, 2012 | Sony Ericsson Xperia Arc

1 Answer

Can i charge battery via USB connection or do i need the charger?


The USB cable port doesn't provide charging for the Li-Ion battery. You need to pull the battery and charge it in an AC charger.

Mar 03, 2012 | FUJIFILM FinePix XP20 / XP22 Digital...

1 Answer

How to start since the power button does not react? How to charge battery?


Try recharging the battery. If that doesn't work, try a new battery.

Use the supplied charger to charge the battery. If you've lost the charger, you can get an LI-41C charger from Olympus. You can also get LI-40B or LI-42B batteries from them.

Jan 15, 2010 | Olympus FE-340 Digital Camera

1 Answer

How long should u charge battery first time and can u over charge


this depends on the battery size, you normally should be ok after 3 hours or so
batteries get to max chargig capacity after about 3 full charges (+ fully drained)

Normally you cannot overcharge, but you can make your battery lazy if you never let it drain and always charge it during work it will get lazy.

So Try to drain your battery frequently, and do not work with te charger connected all the time

Dec 27, 2009 | Acer Computers & Internet

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