Lenovo ThinkPad X200s battery 11.1V 7800mah 9-cell Li-ion battery

Best fit in Lenovo notebooks with ThinkPad X200s battery:

• Lenovo ThinkPad X201 series battery
• ThinkPad X201s battery
• ThinkPad X200 battery
• ThinkPad X200s battery

Battery Part numbers on IBM Thinkpad ThinkPad X200s Notebook:

• Lenovo ASM 42T4537
• Lenovo ASM 42T4541
• Lenovo FRU 42T4536
• Lenovo FRU 42T4538
• Lenovo FRU 42T4540
• Lenovo FRU 42T4542
• Lenovo FRU 42T4649
• Lenovo 43R9254
• Lenovo 43R9255

Lenovo batteries maintain

Do not modify or disassemble the ThinkPad X200s battery without professional help and knowledge.
Do not incinerate, or short-circuit the rechargeable battery pack (put battery with metal objects)
Do not expose laptop battery to heat more than 212°F(100°C), which may cause an exposure.
Do not place battery in device for a long period of time if device is not being used. Remove the battery when you store your computer for an extended period of time.
Do remember discharge then recharge the notebook battery for every few weeks during storage.
Do keep the Lenovo ThinkPad X200s battery away from children.

Extend Lenovo ThinkPad X200s battery life

The length of laptop running time may vary a lot, It depends on the running applications and the external devices connected to your laptop. Battery operating time (the time the battery can hold a charge) will decrease over time. When you travel with your laptop, you would want longer battery life. Here are some basic tips may help you.
1. Dim laptop screen - Adjust your screen brightness(Most laptops come with the ability to dim your laptop screen); As the screen will take 30% also power of the battery, Try turning down the display brightness to the lowest level you can bear(don't no hurt your eyes).
2. Cut down on unnecessary programs - Cut unnecessary auto running programs when boot up ,cut background programs like Itunes, Desktop Search, etc., Shut down everything that isn’t crucial when you’re on battery. You'd better save the basic firewall software when you are online.
3. Unplug unnecessary devices - USB devices (like mouse, keyboard, other widget chargers), PC cards, DVD drivers, Bluetooth and WiFi will extract your laptop battery power a lot. Remove all of this if applicable. Also check for other built-in components that you could disable to conserve more battery power.
4. Use power saving. Remember that standby mode still uses battery power a lot when you left , But use hibernate instead  will save more if your laptop supports this function .