Battery won't hold charge - MacBook

What does it say in the Menu if you click on the battery? It doesn't have to show the percentage and would look pretty much as you describe when on charge and set to show icon only.

If that is wrong, have you been running the battery right down on a regular basis, or running it permanently on the PSU? It can be bad for the battery.

Karn.

welcome to macbook forum.

I believe squiggle line mean your battery is in charging process.

click on that battery and changed to show percentage and it will shows up battery capacity.

Good Luck.

How often do you calibrate your battery? It is OK to leave your battery hooked to the charger most of the time. The only time I unhook my MacBook from the AC adapter is when I calibrate every two months. You should calibrate your battery every two months or so to keep the battery fully functioning. If you use your MacBook infrequently, it’s best to re-calibrate the battery at least once a month.

What do you mean it won't hold a charge. Does it die as soon as the power is unhooked? A little more detail would help.

I calibrate every other month and find that my Blackbook fluctuates the percentage of battery health between 92% and 100%. I have iStat (a widget) and it shows the aforementioned, but I also discovered it under About This Mac>More Info

Is this normal?

That shouldn't be a problem. There is usually some fluctuation in the readings.

Try to reset the SMC (System Management Controller).