Replacement Laptop Battery For COMPAQ Presario CQ40-300

Please ensure the COMPAQ Presario CQ40-300 Battery that you are going to buy fits the brand, model ,voltage and part number of your device. If you can not find your laptop model or battery part number in this list, this battery may still be compatible with your laptop.
Please contact us to check.

Professional manufacturer,one year warranty,CE ROHS MSDS Certificates, 100% brand new COMPAQ Presario CQ40-300 battery but low price,genuine grade A cell ensure the high quality and stable performance of our laptop batteries.
Used as either a spare or replacement battery, this battery pack meets or exceeds the specifications of the original battery that came with your notebook. It interfaces with the Power Saver Utility on the notebook which features a charge indicator to help you monitor the available power.

• Grade A cells Li-ion battery for COMPAQ Presario CQ40-300 .
• Provides excellent discharge characteristics. Over 500-800 times of charge and discharge.
• 100% Compatible with original manufacturer equipments, guaranteed.
• Includes inbuilt over-charge, over-current, over-voltage and short-circuit protection.
• Utilizes state of the art printed circuit board (PCB) design to provide stable and safe performance.
• Brand New, 60 Days Money Back, 1 Year Warranty, 100% Secure Shopping Guarantee!

10.8V and 11.1V are compatible, they are in common use.
14.4V and 14.8V are compatible, they are in common use.
The 10.8V(=11.1V) and 14.4V(=14.8V) are the different voltages, they are not compatible, please choose the right battery(Voltage) for your laptop.
The 7800mAh,6600mah(9 Cells) / 8800mAh,9600mah,10400mah(12 cells) battery will extend out about 1 inch from the bottom of the laptop.

Don't Run It Down to Empty.Full COMPAQ Presario CQ40-300 battery discharges (until laptop power shutdown, 0%) should be avoided, because this stresses the battery a lot and can even damage it. It's recommended to perform partial discharges to capacity levels of 20~30% and frequent charges, instead of performing a full discharging followed by a full charging.

Discharge (or charge) cycles consist of using all that battery charge (100%) but not necessarily all at once. For example, you can use the laptop for some minutes in a day, using half its capacity e then fully charge it. If you did the same thing in the next day, it would be counted a discharge cycle and not two, so it may take several days until a full discharge cycle is completed.

To store a battery for long periods of time, its charge capacity should be around 40% and it should be stored in a place as fresh and dry as possible. A fridge can be used (0oC - 10oC), but only if the battery for COMPAQ Presario CQ40-300 stays isolated from any humidity. One must say again that the battery's worst enemy is the heat, so leaving the laptop in the car in a hot summer day is half way to kill the battery.

• Model: COMPAQ Presario CQ40-300
• 100 Units in Stock