overview:
New, 4400mAh, 14.8V, Li-ion Acer BATCL50L Laptop Battery


This ACER BATCL50L Laptop Battery Replaces the Following Battery
Parts:
BATCL50L BTT3504.001 BTT3506.001


how to make ACER BATCL50L laptop battery last longer?
Actually, many factors affect the amount of time that a laptop battery
can deliver power before it must be recharged. How to extend BATCL50L
ACER laptop battery life? Here are some more tips to improve your ACER
BATCL50L laptop battery notebook's battery life:

1. If you do not use your laptop for extended periods of time (a week
or more), remove the batcl50l acer laptop battery pack from the
laptop.

2. Do not expose the battery to high heat or freezing temperatures. Do
not leave your battery in your car in the summer. Hot batteries
discharge very quickly, and cold ones can't create as much power.

3. Make sure to plug your laptop charger adapter into a UPS and not
directly into a power outlet or surge protector.

4. If you have a nickel-metal hydride battery, completely drain and
recharge the battery once a month to maximize its capacity to hold a
charge.

5. Fully charge new battery packs before use. New pack needs to be
fully charged and discharged (cycled) a few times before it can
condition to full capacity.

6. For laptops that work as Desktop Replacement, the battery should be
re-installed every 3-4 weeks and allowed to fully discharge.

7. Leaving a battery in a laptop while using an electrical outlet for
long periods of time will keep the battery in a constant state of
charging up and that will reduce the life cycle of the battery.


reference from:
http://www.power-batteries.net/noteb.../batcl50l.html

http://www.laptop-battery-inc.co.uk/...r-batcl50l.htm