try these to solve Toshiba Satellite C55-C5241 power light blinks.

The Toshiba Satellite C55-C5241 lithium Ion 45Wh 4-Cell battery is not user replaceable and we do not have the info on battery life but you can probably expect about 4-5 hours considering the system TDP is only 15 watts.But if the battery light is blinking when the computer is on, this indicates a power mismatch.Do you know what power light blinks mean? And how to fix it? Follow to check:

Original TOSHIBA SATELLITE C55-5352 14.8V 2800mAh laptop battery

1 Connect the AC adaptor to a different power outlet, preferably in a different room. If the computer starts normally, there may be a problem with the AC outlet itself, or the voltage level available from it.

2 Verify that the toshiba satellite C55 adaptor is the correct unit for your computer model. The computer may not be able to start from an AC adaptor that is rated for less current (amperage) than the computer requires, even if the rated voltage is correct, and the plug fits correctly in the DC-IN socket. The labels on the bottom of the computer and the AC adaptor show the specifications for voltage (“V”) and current (“A”) for each device. The voltage level must match exactly. The amperage rating of the AC adaptor must be equal to or greater than that required by the computer.The original adapter information is 19V,2.37A, 45W.

3 If your computer has a toshiba removable battery, connect the AC adaptor to the computer. Leave the battery out of the computer. Try turning the computer on again. If the computer starts normally, the battery may need charging, may be depleted, or may be defective. Turn the computer off, insert the battery, turn the computer on, and then leave the computer running for several hours, which will deliver a slow, steady “trickle-charge” to the battery. Once the battery has been trickle-charged, it may begin working correctly again. 

If the trickle-charging does not prove effective, you can connect to Support Online by going to Toshiba support at support.toshiba.com.