No. The offer no protection. If you need protection, you must use a surge protector and even that is no guarrantee it will not damage the battery or the computer.
it cant protect the system against power surges
The best protection is a good UPS (Uninterruptible Power Supply). That will protect you against both surges and brown outs, as well as allowing you to power down safely in case of a power outage.
how can starta surfwear protect there system against power surges
Short circuits.
An electrical device used to protect electronic devices against power fluctuations against power surges by tripping or blowing before those devices can be damaged. They are a very low cost insurance policy built in to equipment to protect it against costly damage.
a sertain way
Yes it can. In fact, if your computer and modem are both plugged into an UPS you may be able to continue surfing during a power outage. It will also protect the modem from power line surges and brown outs that could otherwise be destructive. Many UPS have jacks to plug the telephone line in to protect against surges on the telephone line (phone modems) but typically don't have protection for surges on cable.
Kensington SmartSockets basic adapter provides protection against power surges. It has eight color coded sockets to easily track your cords, and also has a $25,000 limited connected equipment warranty.
It's true that a surge protector would protect against surges like those caused by lightning strikes but would do nothing to help with sags and brownouts. To address both high voltage (surges) and low voltage (brownouts) you would need an uninterruptible power supply (UPS). A UPS provides clean current by powering your computer from the battery while simultaneously charging the battery from the electrical supply.
Printers do not require power surge protection is an example of a false statement about protecting against power surges. Lightning can cause a power surge.
surge protector designed to protect electrical devices from voltage spike. A surge protector attempts to regulate the voltage supplied to an electric device by either blocking or by shorting to ground voltages above a safe threshold.
Electric Current