Equivalent DELL Laptop Batteries

For Dell Latitude C CP CPI CPX Li-ion Battery and Dell Inspiron 2500 3700 3800 4000 8000 Li-ion Battery , they are produced by using new version firmware, so they probably are not compatible to notebooks with old BIOS. If you find the battery doesn't hold charge at all, please get the latest version BIOS for your notebook model at dell.com, update your notebook BIOS, then the battery will work fine on your notebook.
We have carried out the testing on the following models and BIOS version:
1) Latitude CPi A with BIOS A15 (latest) charges and discharges the battery without problem
2) Latitude CPx H with BIOS A14 (latest) charges and discharges the battery without problem
3) Latitude C600 with BIOS A21 or A23 charges and discharges the battery without problem
Service Tag Latitude CPi A : WHKXK
Service Tag Latitude CPx H : 1LFQ201
Service Tag Latitude C600 : 49SH611
You can obtain BIOS from the following URL: http://support.dell.com/support/downloads/index.aspx?c=us&cs=19&l=en&s=dhs
* BIOS cannot be updated if the battery is fully drained or not installed

How long does a Dell laptop battery last? When should I consider replacing mine?
All rechargeable batteries wear out with time and usage. As time and cumulative use increase, the performance will degrade. For the typical user, noticeable reduction in run time generally will be observed after 18 to 24 months. For a power user, reduction in run time generally may be experienced prior to 18 months. We recommend buying a new Dell laptop battery when the run time does not meet your needs.

How should I choose between two batteries with different Watt hours (Whr) available on one system?
Higher Watt hours (Whr) on the same system under the same operating conditions will generally deliver longer battery run time. For example, if you compare the same system, running the same applications, the 53Whr battery would provide approximately 65% more run time than the 32Whr battery.

How do I charge my Dell laptop battery?
The battery charges in the laptop when the laptop is connected to an AC power source via the AC adapter.

How long does it take for a Dell laptop battery to fully recharge?
The charge time varies depending on the system. If the system supports ExpressChargeTM , the battery typically will have greater than 80% charge after about an hour of charging, and fully charge in about 2 hours with the system off.

Should I totally discharge, then recharge my Dell laptop batteries occasionally to make it last longer?
No, discharging and charging does not increase the life of a Lithium Ion technology battery.

Can a Dell laptop battery be "overcharged"?
No, the battery is designed to stop using the charger when it reaches full charge

Is it easy to install a battery?
Yes, very easy. First, make sure all open files are saved. Next, either attach the AC adapter directly to the laptop or set the system to "hibernate" mode or shut off. Release the latch on the current battery, and simply install the replacement battery.

What does Dell recommend for battery storage for a long period of time?
When storing for more than 4 days these guidelines can better preserve the life of your battery:
1,Do not store batteries for long periods plugged into or attached to any power source. This includes AC adapters and laptop security carts plugged into an outlet.
2,Laptop batteries, including those stored in laptop systems, should maintain an Operational Storage Temperature of 0?to 35°C (32?to 95°F).
Batteries may be stored in the laptop or outside of the laptop.
3,Charge batteries before storing. The recommended charging time should not exceed 1 hour. Typically, this should charge the battery to between 80% and 100%. (Some discharge will take place over time. Stored batteries are expected to discharge 10-15% over a four month period, for your information.)