Replacement Presario CQ40 Laptop Battery Tips:

Use compaq battery Presario CQ40 needing attention some matters :
1. Carefulness read narrate book of battery, use commendatory battery.
2. Research the electric appliance and the laptop battery contact elements is clean, when necessry, clean with the wet cloth mop, after dry loads according to the correct polar direction.
3.When non-adult custody, don't let the child replace the battery, compact battery like AAA should place the place which the child cannot attain.
4.Don't mix up new and old battery or put different model batteries together.
5. Don't try to make the battery rebirth use of hotting up,charging,or in any other way.
6. Don't let battery short circuit.
7. Don't hot up laptop battery or loss it in water.
8. Don't strip battery.
9. Electro-adapter should cut switch after use.
10. Take off compaq Presario CQ40 battery from adapter when battery long time no use .
11.Battery should be stocked in cool and dry places.

Follow the notice below, Better using your laptop battery:
* Try to avoid frequent full discharging of the Lithium battery.
* For Presario CQ40 battery meter calibration, periodically do a full battery discharge, every 30 charges, to increase meter accuracy.
* Avoid propping your laptop on a pillow, blanket, or other soft surface that can heat up. Your laptop battery is a lot less efficient when not within its standard operating temperature range.
* If you plan to place your battery in storage, be sure to have the charge at 40% and stored in the fridge (not freezer) for maximum battery longevity.

How Long Do My Laptop Batteries Last ?
The life of a rechargeable laptop li-ion battery operating under normal conditions is generally between 500 to 800 charge-discharge cycles. This typically translates into one and a half to three years of battery life for the average user. As your rechargeable battery begins to die, you will notice a decline in the running time of the battery. When your two hour battery is only supplying you with an hour's worth of use, it's time for a new one.

What Should I Do If My Battery Isn’t Charging ?
For safety reasons new batteries are not shipped in a fully charged condition. As such the laptop battery must be fully charged before use. Before the initial use please complete two to three charge cycles in order for the battery to display its full capacity. This means the battery should be fully charged and then fully discharged (so that the battery is completely dead) several times. The battery may become warm during the charging cycle. This is part of normal operation and does not indicate an error or defect. If the battery does not reach its full charge please take it out of the device and reinsert it. This should reset the charging function and allow for the battery to be fully charged.

What Kind Of laptop battery Should You Get?
You are watching your television and a commercial comes on that claims that they have found the internet in the vast reaches of a mountain wasteland. It is a great advertising gimmick but it raises a very good question - how would you recharge your laptop battery way up in the mountains? As more people become reliant on their laptops for their every day existence the laptop battery takes front and center as one of the most important parts of the laptop computer. Many people run their laptop battery until it just cannot hold a charge anymore and then they look to replace it. Some people buy extra batteries and carry them around with them fully charged so that they can keep on computing wherever they are. Still others hail the advent of the laptop battery that increases battery time by a significant margin and eliminates the need to carry extra batteries around. Many people like the idea of using their laptop on and off all day without having to recharge their batteries until they settle in for the night. But there are a lot of things to consider with your compaq Presario CQ40 battery replacement and some of the most important things to consider are things you would never think of.