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Connect to source of supply battery critically low

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If the unit is working properly, then the battery is very low and needs charging. If the unit is old, then the rechargable battery may be worn out and have to be replaced.

Posted on Oct 23, 2013

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SanDisk Sansa Express 2 GB MP3 Player (Black), battery status states 14% critically low....what does it mean and what actions should I suppose to do?


You need to charge the battery so you can continue playing your MP3player.
Connect the supplied USB cable into the player and then plug it into the USB port of your computer. The computer will charge up the MP3 player and you can also copy mp3 music and photos etc to the MP3 player.

Aug 25, 2011 | SanDisk Audio Players & Recorders

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My HP Pavilion Dv 5000 notebook stop working: no power and the power Led is off. I opened it and tested the power cable which is OK; I checked all over the motherboard looking for some damaged or burnt...


Of the two LEDs at the left front of the notebook, if the left-most one is blinking, then the notebook is in standby. If the left-most one is off and the one to the right of it is blinking, then the notebook is in a low battery condition and quite likely the notebook had initiated hibernation. If you had the AC adapter plugged-in for some time and the low-battery condition persists, then likely the adapter has failed. Normally you would just press the power button to restore from hibernation but if the system had initiated hibernation due to a critical low-battery condition, the system may not respond unless you have inserted a fully-charged battery pack. Here is an excerpt from page 38 (Chapter 3 Power) of the HP Pavilion DV5000 User Manual....

*If the system initiated hibernation because of a critical low-battery condition, connect external power or insert a

charged battery pack before you press the power button. (The system may not respond if the discharged battery pack
is the only power source.)

Jul 27, 2011 | HP Pavilion dv4000 Notebook

1 Answer

Camera indicates low battery even for fully charged battery.


I have connected my PowerShot A2000IS that was doing the same thing for me and I discovered the following:
1) The unit works fine even down to 2.5V providing the supply source (i.e. batteries can deliver 500 mA for a short burst during startup, i.e. when the camera's lens is extended). The camera draws 300mA with screen on after the initial startup current has settled. This means that the camera may not work with batteries like normal alkaline as these don't normally supply large currents, like NI-MH and NI-Cd can.
2) I found that if I lowered the voltage down to (using my bench power supply) that the low power indicator come on at just under 2.5 Vs, BUT once it has indicated low battery, turning the voltage back up to 3V didn't remove the low battery indication.
3) Finally I connected my fully charged (with combined voltage of 2.7V) Ni-Mh rechargeables (old and well used) using wires to allow me to measure their voltage and I found that when I turned on the camera the voltage dipped to 2.3V, but come up after the lens was deployed.

Conclusion and recommendations:
a) Get some new high quality Ni-Mh cells.
b) Don't use Alkaline cells (even Duracell brand might not handle it).
c) Forget Ni-Cd as terminal voltage would be at best 2.6V which doesn

Oct 03, 2010 | Canon Powershot A2000 IS Digital Camera

1 Answer

The amber light on the power supply on my HP 550 laptop is flashing 8 times when i press the power button.it does not start ....


This is taken from page 11 of the user's manual (http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c01627018/c01627018.pdf)

Blinking amber: A battery that is the only available
power source has reached a low battery level. When
the battery reaches a critical battery level, the battery
light begins blinking rapidly.

In other words, attach the charger to the laptop and let charge for at least 1 hr before trying to restart your computer.

Mar 24, 2010 | HP Business Notebook 550

2 Answers

Won't start - battery critically low


You should have a light on the notebook indicating that the power supply is plugged in (this should come on with or without the laptop being turned on). My acer has a green light for power, and the battery indicator shows amber for charging and green for full. If you are not seeing the power or charging indicators, you either have a damaged power jack, or a damaged power supply. Power supplies can be purchased usually for fairly cheap online, but if your power jack is damaged, the laptop will have to be serviced by a service center, or by someone who is skilled with a soldering iron and the disassembly and reassembly of laptops.

Feb 28, 2010 | Acer TravelMate 2413LCi Notebook

1 Answer

My laptop keeps shutting down,and doesnt let me do anything ..what can be the problem?


It sounds as if the computer thinks the battery is critically low. You might want to check the output of the AC power supply to ensure you're getting power to recharge the battery.

Jan 27, 2010 | Fujitsu Siemens LIFEBOOK T4010D Tablet PC

1 Answer

Hewlett packard 6735s power up


Your battery is critically low. Didnt you recharge your battery? Try turning it on with the external power source connected.

Jan 14, 2010 | HP Compaq 6735s Notebook

1 Answer

Battery is low / critical please switch to power


ok, how old is your laptop battery?, if it is over 2or 3 years and you always have it connected to your laptop while the power adapter is plugged to the wall when you use it, it must be time to replace it.
While on the other hand, if you have Windows XP Service Pack 2, then there's an issue problem between the Operative system and the battery itself. Here's a hotfix posted on the Microsoft's website and you should only use it if the problem meets this description http://support.microsoft.com/kb/938961 . Good luck.

Jan 03, 2010 | Acer Aspire 3000 Notebook

1 Answer

How to take ups in manual bypass mode.


You definitely want to follow the manual procedure to avoid a possible load loss:

http://powerquality.eaton.com/Products-services/Backup-Power-UPS/9390.aspx?cx=3

9.1.4 Transfer from Normal to Bypass Mode
To transfer the critical load to Bypass mode:
C A U T I O N
In Bypass mode, the critical load is not protected from commercial power interruptions and abnormalities.
1. Press the CONTROLS pushbutton on the main menu bar. The System Controls
screen appears.
2. Press the BYPASS pushbutton on the System Controls menu bar.
The UPS transfers to Bypass mode and the critical load is immediately supplied
by the bypass source. If the bypass source is not available, the power processor
remains on and an alarm sounds.
3. The UPS is now operating in Bypass mode and the BYPASS status indicator is
illuminated.
The power module (PM) status indicates READY. The system is now on bypass
and the UPS power processor remains on.


At this point, you can operate an external bypass switch to get to maintenance bypass if needed.

Oct 14, 2009 | Eaton PW9390 UPS System

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