How can i reset battery percentage?

Hi, @mosh tech

A laptop that shuts off at 50% usually has a weak cell inside the battery, or its battery gauge has lost track of how much charge is really left. Windows might also be set to treat 50% as a "critical" level.

Here are some suggestions you can try:

Check the battery level settings in Windows. Press Windows + R, type powercfg.cpl and press Enter. Click Change plan settings > Change advanced power settings, then expand Battery. Make sure Critical battery level and Low battery level are set to something like 5% and 10%. Also set Low battery action to Do nothing. If either level was set too high, the laptop will shut itself down early.

Reset the power controller. Shut the laptop down and unplug the charger. Hold the power button for about 15 seconds, then plug the charger back in and turn it on.

Run HP's own battery test. Fully charge the laptop and unplug the charger. Turn it on and tap Esc repeatedly until a menu appears, then press F2. Go to Component Tests > Power > Battery > Run once. If the result says Calibrate, click Calibrate Battery and let HP's tool reset the battery gauge. This can take 12 to 14 hours, so it's best to start it overnight.

Update the BIOS. Get the latest BIOS for the ProBook 430 G3 from HP's drivers page or HP Support Assistant. Newer BIOS versions can fix how the laptop reads the battery.

If the HP test shows Replace or a failure ID, one of the battery cells is most likely dead. A new battery is the only real fix, so write down the failure ID in case you need to contact HP.