The battery is only warranted from defects in material or workmanship resulting in failures.Reduced runtime is not warranted and will vary depending on the power management settings and configurations that are set on the mobile device as well as the number of times the battery has been charged and discharged.The advantage of Battery Log mode of Batteryinfoview is that you can visualize the battery drainage over time..Generally, if you can get original replacement from laptop manufacturer, that would be the best.Because the bios battery is used to retain the settings of the Date and time RTC Real Time Clock. that is why the battery is there to keep the time and date right. Isn't it cmos battery alone is enough to save the date/time setting? I bought the notebook at 2005, so it's been about 7 years. It has a Negative spring plate at the bottom and two positive folds at the top that make contact with the battery... I only detach the notebook battery, so that means I only use power adapter to start the notebook. Duh, I tried to diassemble the notebook, but it's hard. Bought new battery but CMOS still resets the date etc. So i bent them slightly untill i could test the signal on the back of the and - pins on the motherboard...
Replacements will be made using new or refurbished BTI product (at BTI's discretion).
**NOTE: The capacity of all rechargeable batteries will decline over time depending on the use and charging/discharging process.
This is considered normal and therefore, a reduction in battery capacity is not covered under warranty.
I also remember that I had set a password for the BIOS but now it's gone, all settings seems back to default. But interesting thing that I found if I restart or turn-off-then-turn-on the notebook without unplugging the power adapter, the BIOS date/time are not reset to default.
Because the bios battery is used to retain the settings of the Date and time RTC Real Time Clock. that is why the battery is there to keep the time and date right. Unplug the main power without a Cmos battery = Bios restet every time. Just be careful not to break them when you bend them..are fragile.