How to do when your acer caltech 21cp4/70/125 laptop battery won't charge

1, Please check the hardware at first:

  a, Clean the acer caltech 21cp4/70/125 battery contacts. Try charging the laptop battery with the power off. Some laptops draw a lot of power -- so much so that they can't efficiently charge the battery and run demanding tasks at the same time. If the battery doesn't seem to be getting fully charged, shut down the laptop entirely and see how it goes.

  b, Try a deep charge. If the acer caltech 21cp4/70/125 battery is in a bad state, you might be able to bring it back to life with a deep charge cycle. First, make sure it's complete discharged by running the laptop with the battery installed (and the AC adapter removed) until the laptop completely dies. Then charge the laptop overnight.

  c, If your original old battery still charges and discharges but your new replacement acer caltech 21cp4/70/125 battery will not, the new battery may have run to 0% or it may be a defective unit. This may be an indication that you need to replace your AC Adapter. It is more difficult to charge a new battery than it is to charge an older "broken in" battery. If your AC adapter is not outputting the correct amount of power you can run your computer, and charge an old battery, but you may be unable to charge a brand new battery.

If neither battery will recharge, you are most likely experiencing a failure in the laptop charge system (AC adapter, charge port, or motherboard charge circuit).

2, Configuring and upgrading software:

  a, Make sure you're on the latest BIOS revision for your laptop. Windows system, you could also try a repair install and rule out a corrupt installation.

  b, Have a look at your power settings, open up your control panel, and head into the Power Options.
There are several settings in here, take a quick glance around to make sure that nothing looks out of place. The particular one to look out for is the setting that causes your laptop to shut down if your battery percentage drops to a certain low threshold.

  c, Update your drivers, open up the device manager, and under Batteries you'll find a number of entries.
There should usually be three, one for the battery itself, one for the charger and a third called 'Microsoft ACPI Compliant Control Method Battery'. Right click on all of these entries head into properties, then into the driver tab and find the 'Update Driver' button (This may also be found by just right clicking the entry and hitting 'Update driver software'). Once you've done this, restart your laptop and try plugging the charger in again.

If you try all of these troubleshooting steps and your battery is still not working properly, it's time to get a new battery.

Cheap caltech 21cp4/70/125 7.4V,2 cell laptop batteries

1. original battery for acer caltech 21cp4/70/125, 7.4 voltage, 4350 mAh, 2 cells, Li-Polymer laptop batteries

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	Product ID: 1004773 Battery Type: Li-Polymer Property: original battery [?] Voltage: 7.4 V Battery capacity: 4350 mAh (2 cell) Color: black Warranty: 12 months

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Acer caltech 21cp4/70/125 laptop batteries can replace the following part number:

caltech 21cp4/70/125 laptop battery is compatible with the following models :

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You have a larger selection of laptop batteries, which can perfectly work with your equipment.

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How long will my acer caltech 21cp4/70/125 batteries last?

The lifespan of a caltech 21cp4/70/125 laptop batteries will vary considerably with how it is used, how it is maintained and charged, temperature, and other factors.

Does acer caltech 21cp4/70/125 batteries self-discharge when not in use?

All batteries, include caltech 21cp4/70/125 laptop batteries, regardless of their chemistry, self-discharge. The rate of self-discharge depends both on the type of laptop battery and the storage temperature the batteries are exposed to. However, for a good estimate, wet flooded deep cycle laptop batteries self-discharge approximately 4% per week at 80°F.

Disclaimer:
The caltech 21cp4/70/125 laptop batteries and other products supplied by our Company are [replacement for] sold for use with certain product manufacturers, and any reference to products or trademarks of such companies is purely for the purpose of identifying the manufacturers with which our products [are replacement for] may be used. Our Company and this Web site are neither affiliated with, authorized by, licensed by, distributors for, nor related in any way to these manufacturers, nor are the products offered for sale through our web site manufactured by or sold with the authorization of the manufacturers with which our products [are replacement for] may be used.