Power and Battery Issues

if problems working from AC power:
- test the outlet with a “known good” device
- check that an LED on the AC adapter is green
- if no LED, check the fuse on the plug
  - try testing with a known good adapter
If a mobile device will not power on when unplugged:
- check that the battery is seated properly
- check whether the battery contacts are dirty\
  - clean them using swabs
- if battery is inserted properly, but issues still persist:
  - most likely completely discharged
  - battery with poor health will not hold a charge
    - end of its useful life
  - test this by using a known good battery
- If a known good battery does not work:
  - something wrong with the power circuitry on the motherboard

Improper Charging Symptoms

Use the battery charger provided by the manufacturer or an approved replacement charger
- Using an incorrect battery charging cable carries risks of fire or even explosion
improper charging routine will reduce the usable life of a battery
- Follow manufacturer instructions
- use power management features included with your device/OS
- A Li-ion battery should not:
  - fully discharge regularly
  - be kept persistently at 100% charge
If the battery is not old or faulty:
- could suspect that an app is putting excessive strain on the battery
  - use an app to check battery utilization

If you notice any swelling from the battery compartment
- discontinue use of the mobile device immediately
Signs that the battery has swollen
- device wobbles when placed flat on a desk
- deformed touchpad or keyboard
swollen battery indicates some sort of problem with the battery’s charging circuit
- is supposed to prevent overcharging
- exposure to liquid could damage battery
Li-ion batteries are designed to swell to avoid bursting or exploding
- take great care when handling a swollen battery to avoid further damage
- swollen battery is a fire hazard
  - could leak hazardous chemicals
  - do not allow contact with skin or eyes
- if battery does not come out easily, contact manufacturer for advice
- contact the manufacturer for specific disposal instructions
- should not be discarded via standard recycling points
  - unless the facility confirms it can accept batteries in a potentially hazardous state