Here are shots of the 6-cell battery itself. This is the original Lenovo 6-cell battery that came with my S10. First is the overall view and next is the side view that shows it is like two cylinders joined on the side. Note the rail on the straight part of the battery.
The next two photos show the S10 without the battery, one a side view and the other the back view.
The next photo is a close-up on the back of the S10 that shows the "guide rail" for the battery. There is a similar one on the other side. Besides being a guide for inserting the battery in the correct angle, it also helps to relief the stress on the battery connection as part of the weight of the S10 will be resting on the battery itself once it is installed.
The next photo shows the S10 with the battery installed. Note that the battery comes with two rubber feet and this takes over the function of the two back rubber feet on the S10 itself (which is used if the 3-cell battery is installed) to provide support since the battery now lifts up the back of the unit.
This also gives the keyboard a certain slant (sloping towards the user which is good for the wrist if you type a lot) and it also increases the space between the bottom of the unit and the resting surface and improves the air circulation and aids heat dissipation. On actual usage, the unit doesn't wobble and feels very steady indeed. These are very good reasons to opt for the 6-cell battery, not to mention the extended battery life. The additional weight is minimal; my S10 weighs in at 1.3kg with the battery installed.
I noticed in some photos of 3rd party battery, there are no rubber feet and the weight will be on the front 2 rubber feet and the battery body itself and it also reduces the air circulation. Not sure if it has the rail that fits the guide rails mentioned earlier.
So much for the battery. Here are some other comments on the S10. I'm happy that it is very easy to upgrade the memory as well as the HDD if you wish to do so. Just remove 2 screws and lift out the back panel cover. See photo below. I heard it is pretty messy to do the same in some other netbooks.
There are a few cons as nothing is perfect. The click buttons on the touch-pad is very stiff and needs great effort to click. Thinking positively, it means you will never click in error.
The SD card sticks out and the slot is not spring loaded (like in most other devices but not sure about other similar netbooks) so you're not certain if you have fully inserted the card. On the positive side, you can see if you have removed your card or not. See photo below.
Finally, most other netbooks have 3 USB ports while the S10 has only 2. Granted the S10 comes with Bluetooth and an Express card slot which others may not have but such devices are expensive and nothing like the el cheapo USB stuff that is available. In fact there is a perfect space for adding another USB port just next to the LAN port. With this in place, the S10 will thump the competition, hands down.
Did somebody say S11?