L8 - T8D - S1 - Power and Battery Issues

• First test the outlet with a "known good" device (such as a lamp)

• Next, check that an LED on the AC adapter is green

  • If there is no LED, check the fuse on the plug

  • If available, try testing with a known good adapter

Things to do if you experience problems from AC power (building power)

True

• This is useful for if e.g. an AC adapter is mixed up with another

  • User will immediately know something is wrong

True or False: If an underpowered adapter is used—for example, a 65 W adapter is plugged into a 90 W system—the laptop will display a warning at boot time 

• First check that the battery is seated properly in its compartment

• Also check whether the battery contacts are dirty

  • You can clean them using swabs

Things to do if a mobile device won’t power on

• You can test this by using a known good battery

• If a known good battery does not work, then there is something wrong with the power circuitry on the motherboard 

Things to do if the battery only remains on for a few seconds

• Likely completely discharged/poor health (end of useful life)

Return to vendor for battery replacement

What to do if a battery in a device with a non-removable battery loses its charge/end of life

• Do not leave a battery to charge overnight unattended

• Do not leave a battery charger close to flammable material

• Li-ion battery

  • Should not be fully discharged regularly

  • Should not be kept persistently at 100% charge

Things to do to avoid improper charging

• Use the manufacturer-supplied charging cables

• Using an incorrect battery charging cable or exposing a battery to extreme heat carries risks of fire or even explosion 

• Use the power management features included with your device/OS to prolong battery life

• Ensure there is plenty of ventilation around the unit

Charging best-practices

• Battery is old

• Battery is faulty

• App is putting excessive strain on battery

Potential reasons for short battery life

Discontinue use of the mobile device immediately

What to do if you notice a swollen battery

• A device that wobbles when placed flat on a desk

• A deformed touchpad or keyboard

Swollen Battery Symptoms

• Problem with the battery's charging circuit

  • Which is supposed to prevent overcharging

• Device may have been exposed to liquid

  • This could have damaged the battery

Swollen Battery Causes

True

• This is to avoid bursting or exploding

  • Great care must be taken when handling a swollen battery to avoid further damage

  • A swollen battery is a fire hazard and could leak hazardous chemicals—do not allow these to come into contact with your skin or your eyes

True or False: Li-ion batteries are designed to swell

• If the battery cannot be released safely and easily from its compartment, contact the manufacturer

  • You should also contact the manufacturer for specific disposal instructions

  • Swollen battery should not be discarded via standard recycling points

    • Unless the facility confirms it’s fine

What to do if you have to operate/replace a swollen battery, but it can’t be released safely

True

• This is why it is important to remain signed up to the vendor's alerting service

  • So you are informed about any product recalls or safety advisories

True or False: Manufacturing defects in batteries and AC adapters often occur in batches