Tip & How-To about Miscellaneous

Long live battery of your Smartphones.



Don't charge your smartphone to 100% level.
Charge your phone's battery till 90%.
And don't wait for fully discharge of battery,whenever battery level go below 40% ,if possible charge your phone till 90%.


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acer aspire 5741g


If the laptop battery is more than 3 - 4 years old then the battery could be worn out. Rechargeable batteries have a finite number of charge and discharge cycles and will lose their charge capacity over time, i.e. won't charge to 100% and gradually the charge reduces until the battery won't charge up at all. OR The battery shows a 100% charge but when the adapter is disconnected the battery drops off to zero capacity in a very short time. If the battery drops to an unacceptable charge level then the battery needs to be replaced.
Rechargeable batteries will fail if stored in a discharged state for long periods.

May 16, 2013 | Computers & Internet

1 Answer

my battery level reduce with in a day after full charge so how to solve the draining problem of my 5800nokia?


If the cell phone battery is more than 3 - 4 years old then the battery could be worn out.Rechargeable batteries have a finite number of charge and discharge cycles andwill lose their charge capacity over time, i.e. won't charge to 100% andgradually the charge reduces until the battery won't charge up at all. OR Thebattery shows a 100% charge but when the adapter is disconnected the batterydrops off to zero capacity in a very short time. If the battery drops to anunacceptable charge level then the battery needs to be replaced.

Aug 04, 2011 | Nokia 5800 XpressMusic Smartphone

1 Answer

My phone charges but never reaches the stage where message says "your battery is full now", even if i leave it overnight to charge. then when i turn the phone on, it's life is only a couple of hours - most of it on standby (i don't use phone a lot). Do i have a problem with the battery or with the phone itself?


Ifthe cell phone battery is more than 3 - 4 years old then the battery could be wornout. Rechargeable batteries have a finite number of charge and discharge cyclesand will lose their charge capacity over time, i.e. won't charge to 100% andgradually the charge reduces until the battery won't charge up atall. ORThe battery shows a 100% charge but when the adapter is disconnected thebattery drops off to zero capacity in a very short time. Ifthe battery drops to an unacceptable charge level then the battery needs to bereplaced.

Jun 06, 2011 | Nokia 7230 Cell Phone

1 Answer

Two brand new Hitachi BSL1815X Lithium Batteries won't recharge (UC18YGSL charger and DS 18DSAL drill)


These batteries have big problems that Hitachi doesn't address very well. Unlike NiCad batteries, Lith-Ion ones must be periodically used and recharged to retain their battery functions, i.e. if they have been sitting on the shelf at a store for an extended period of time, chances are they will be dead when bought and will not accept a charge. If they go dead i.e. no little red light on the charger when you plug the battery unit in...it's basically junk.

If you can return them or exercise the warranty do so. If / when you get new ones DO NOT completely discharge them like you would NiCads. Lith-Ion batteries do not have the "battery memory" issues that NiCads have which means you don't lose running time if you don't fully discharge the battery unit prior to recharge. Completely discharging before recharge will ultimately kill them. Use the 1815X till almost dead and then charge it. It is also recommended Lith-Ion batteries not be stored fully charged i.e. charge the 1815X fully, drive a couple bolts or screws, remove the battery unit and then put it away. Do not leave battery unit plugged into the tool when you put the tool away. This will discharge and kill the battery unit.

There are non-Hitachi substitute batteries now on the market. I'm guessing the same precautions apply but I don't own one of the replacements so I don't truly know.

The actual batteries in the Hitachi BSL 1815X are Sanyo UR18650SAX lithium ion batteries. Lithium Ion cells aren't all that easy to get commercially because of handling & safety requirements. Not certain if you can take apart the 1815X and swap out the bad Sanyo cells.

Jan 07, 2011 | Hitachi Koki Usa WH18DL Lithium Ion...

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