Date/Time reset on Asus Eee PC 1005HA Laptop

Q:"I have an Asus 1005ha running Windows XP. Recently, when not plugged in and booting up, the system went to a utility screen and I had to press F2 to get Windows to boot up. When Windows came up, the system date had reset to January 2002 (I don't remember which date). If I do a simple restart, the clock doesn't reset, but if I leave it off for a while, the clock will get behind. If I leave it off for a long time, the clock resets. I read that a possible problem might be the RTOS asus eee pc 1005ha battery and it sounded simple to fix because the round battery was easy to find on my desktop PC and I had replaced the hard drive on the netbook. When I opened it up though, I could not find the round battery on either side of the motherboard. What is causing my problem with the clock resetting? What is an RTOS eee pc 1005ha battery and how do I replace it on my Asus eee pc 1005ha? If anyone can help me, I would appreciate it."

S1:" Once I remove the 4 phillips screws, what are the next steps to open up the case.The next step would be to get the keyboard out. There are four tiny little 'cantilever' clips that locks the keyboard in place. And you'll be able to see these clips inside the main asus laptop battery bay (after you remove the big main laptop battery block at the rear-underside of the laptop). You probably need to carefully insert a tiny flat screwdriver to move the cantilever clips outwards, and then keep those clips out with little bits of folded paper strips or something. Once those clips have all been moved outwards and kept in the 'open' position, then the keyboard can then pop out (starting from the part of the keyboard closest to the display). I don't like this clip idea. I would prefer screws."

S2:"If you know anyone with a coin asus eee pc 1005ha charger then you might be able to recharge the ML1220 and then put it back...
I don't think the system charges the battery though, since it only has a basic two pin connection and at the very least it needs to detect the battery polarity to avoid over charging. Unlike other rechargeable batteries lithium can explode if over charged even a little bit and netbooks are very basic. So likely it's just using it like a regular battery, which would also explain why it died so soon rather than later and so suddenly instead of slowly dying as it lost capacity over time.
So you should be able to replace it with any coin eee pc 1005 battery you can get to fit and as long as the battery is thin you can also fit it above or under the motherboard. So not locked in to just that corner space. Even more space if you have a unit without the bluetooth module..."

4 pin is pretty rare... then again most systems use CR batteries or Ni-MH rechargeable that don't require careful monitoring. Especially desktop motherboards... So seems rather dangerous if they use lithium rechargeable without proper monitoring but they do tend to treat these systems as disposable and really want us to keep on buying new systems every year or two anyway.

This wasn't the case for the older Eee PC's, thus my confusion, but it seems they changed it for the Seashell models. Meaning they must have at least added a reverse polarity sensor on the motherboard otherwise it would be dangerous because lithiums have to stop charging when fully charged. They can't be continuously charged because they will over heat and explode and it takes very little over charge to do it. So there has to be a cut off but even then waiting till the polarity changes at full charge isn't all that accurate and would wear on the battery more than the more advance monitoring system used for the main system laptop battery.

I see at least one transistor near the CMOS connector, usually need two for polarity detection. But if in place then then something else to watch out for is some experiencing this problem the sensor could be permanently switched, power surge for example could have damaged the transistor, and never charge the asus eee pc 1005ha battery and that would be another problem that would cause the premature replacing of the CMOS ML battery as recharge-ables tend to not hold as much charge as non-charge-ables. And another problem with lithium is over draining kills them too. So if over drained then the ML's won't be chargeable anymore.

So if seeing signs of CMOS failure then immediately see if it can be recharged before it completely dies...
http://www.laptop-battery-store.ca/asus-eee-pc-1005ha-ac-adapter.html