Rear View; Status Indicators - Lenovo ThinkPad S540 User Manual

3 Memory-upgrade slots
Depending on the model, your computer might have one or two memory-upgrade slots. You can increase
the amount of memory in your computer by installing a memory module into a memory-upgrade slot.
Memory modules are available as options from Lenovo. For more information, see "Replacing a memory
module" on page 74.
4 Integrated battery
Use your computer with the battery power whenever ac power is unavailable.
5
Hard disk drive, solid-state drive, or hybrid drive
Depending on the model, your computer might have a large-capacity, customer-upgradable hard disk
drive that can meet a variety of storage demands.
Some models are equipped with a solid-state drive for data storage, making your computer lighter, smaller,
and faster.
Note: The hidden service partition is the reason why there is less free space than expected on your hard
disk drive or solid-state drive. This reduction is more noticeable on the solid-state drive because of its
smaller capacity.
Some models are equipped with a hybrid drive, which is a storage device that combines NAND flash
solid-state memory with hard disk drive technology.
6 Wireless LAN card slot
Your computer might have a wireless local area network (LAN) card for you to establish wireless LAN
connections.

Rear view

Figure 5. Rear view

Status indicators

Your computer has several status indicators that show the status of your computer.
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Chapter 1 Product overview
7